#include <ForcingMovingBody.h>

Inheritance diagram for Nektar::ForcingMovingBody:

Static Public Member Functions
static SolverUtils::ForcingSharedPtr	create (const LibUtilities::SessionReaderSharedPtr &pSession, const std::weak_ptr< SolverUtils::EquationSystem > &pEquation, const Array< OneD, MultiRegions::ExpListSharedPtr > &pFields, const unsigned int &pNumForcingFields, const TiXmlElement *pForce)
	Creates an instance of this class. More...

Static Public Member Functions inherited from Nektar::SolverUtils::Forcing
static SOLVER_UTILS_EXPORT std::vector< ForcingSharedPtr >	Load (const LibUtilities::SessionReaderSharedPtr &pSession, const std::weak_ptr< EquationSystem > &pEquation, const Array< OneD, MultiRegions::ExpListSharedPtr > &pFields, const unsigned int &pNumForcingFields=0)

Static Public Attributes
static std::string	className
	Name of the class. More...

Protected Member Functions
virtual void	v_InitObject (const Array< OneD, MultiRegions::ExpListSharedPtr > &pFields, const unsigned int &pNumForcingFields, const TiXmlElement *pForce)

virtual void	v_Apply (const Array< OneD, MultiRegions::ExpListSharedPtr > &fields, const Array< OneD, Array< OneD, NekDouble >> &inarray, Array< OneD, Array< OneD, NekDouble >> &outarray, const NekDouble &time)

Protected Member Functions inherited from Nektar::SolverUtils::Forcing
SOLVER_UTILS_EXPORT	Forcing (const LibUtilities::SessionReaderSharedPtr &pSession, const std::weak_ptr< EquationSystem > &pEquation)
	Constructor. More...

virtual SOLVER_UTILS_EXPORT void	v_PreApply (const Array< OneD, MultiRegions::ExpListSharedPtr > &fields, const Array< OneD, Array< OneD, NekDouble >> &inarray, Array< OneD, Array< OneD, NekDouble >> &outarray, const NekDouble &time)

virtual SOLVER_UTILS_EXPORT void	v_ApplyCoeff (const Array< OneD, MultiRegions::ExpListSharedPtr > &fields, const Array< OneD, Array< OneD, NekDouble >> &inarray, Array< OneD, Array< OneD, NekDouble >> &outarray, const NekDouble &time)

SOLVER_UTILS_EXPORT SessionFunctionSharedPtr	GetFunction (const Array< OneD, MultiRegions::ExpListSharedPtr > &pFields, const LibUtilities::SessionReaderSharedPtr &pSession, std::string pName, bool pCache=false)
	Get a SessionFunction by name. More...

SOLVER_UTILS_EXPORT void	EvaluateTimeFunction (LibUtilities::SessionReaderSharedPtr pSession, std::string pFieldName, Array< OneD, NekDouble > &pArray, const std::string &pFunctionName, NekDouble pTime=NekDouble(0))

SOLVER_UTILS_EXPORT void	EvaluateTimeFunction (const NekDouble pTime, const LibUtilities::EquationSharedPtr &pEqn, Array< OneD, NekDouble > &pArray)

Protected Attributes
GlobalMapping::MappingSharedPtr	m_mapping

Protected Attributes inherited from Nektar::SolverUtils::Forcing
LibUtilities::SessionReaderSharedPtr	m_session
	Session reader. More...

const std::weak_ptr< EquationSystem >	m_equ
	Weak pointer to equation system using this forcing. More...

Array< OneD, Array< OneD, NekDouble > >	m_Forcing
	Evaluated forcing function. More...

int	m_NumVariable
	Number of variables. More...

std::map< std::string, SolverUtils::SessionFunctionSharedPtr >	m_sessionFunctions
	Map of known SessionFunctions. More...

Private Member Functions
	ForcingMovingBody (const LibUtilities::SessionReaderSharedPtr &pSession, const std::weak_ptr< SolverUtils::EquationSystem > &pEquation)

void	CheckIsFromFile (const TiXmlElement *pForce)

void	InitialiseCableModel (const LibUtilities::SessionReaderSharedPtr &pSession, const Array< OneD, MultiRegions::ExpListSharedPtr > &pFields)

void	InitialiseFilter (const LibUtilities::SessionReaderSharedPtr &pSession, const Array< OneD, MultiRegions::ExpListSharedPtr > &pFields, const TiXmlElement *pForce)

void	Newmark_betaSolver (const Array< OneD, MultiRegions::ExpListSharedPtr > &pFields, Array< OneD, NekDouble > &FcePhysinArray, Array< OneD, NekDouble > &MotPhysinArray)

void	EvaluateStructDynModel (const Array< OneD, MultiRegions::ExpListSharedPtr > &pFields, Array< OneD, NekDouble > &Hydroforces, NekDouble time)

void	SetDynEqCoeffMatrix (const Array< OneD, MultiRegions::ExpListSharedPtr > &pFields)

void	RollOver (Array< OneD, Array< OneD, NekDouble >> &input)

Private Attributes
int	m_movingBodyCalls
	number of times the movbody have been called More...

int	m_np
	number of planes per processors More...

int	m_vdim
	vibration dimension More...

NekDouble	m_structrho
	mass of the cable per unit length More...

NekDouble	m_structdamp
	damping ratio of the cable More...

NekDouble	m_lhom
	length ratio of the cable More...

NekDouble	m_kinvis
	fluid viscous More...

NekDouble	m_timestep
	time step More...

LibUtilities::NektarFFTSharedPtr	m_FFT

FilterMovingBodySharedPtr	m_MovBodyfilter

Array< OneD, NekDouble >	m_Aeroforces
	storage for the cable's force(x,y) variables More...

Array< OneD, Array< OneD, NekDouble > >	m_MotionVars
	storage for the cable's motion(x,y) variables More...

Array< OneD, Array< OneD, Array< OneD, NekDouble > > >	m_fV
	fictitious velocity storage More...

Array< OneD, Array< OneD, Array< OneD, NekDouble > > >	m_fA
	fictitious acceleration storage More...

Array< OneD, DNekMatSharedPtr >	m_CoeffMat_A
	matrices in Newmart-beta method More...

Array< OneD, DNekMatSharedPtr >	m_CoeffMat_B
	matrices in Newmart-beta method More...

Array< OneD, std::string >	m_funcName
	[0] is displacements, [1] is velocities, [2] is accelerations More...

Array< OneD, std::string >	m_motion
	motion direction: [0] is 'x' and [1] is 'y' More...

Array< OneD, bool >	m_IsFromFile
	do determine if the the body motion come from an extern file More...

Array< OneD, Array< OneD, NekDouble > >	m_zta
	Store the derivatives of motion variables in x-direction. More...

Array< OneD, Array< OneD, NekDouble > >	m_eta
	Store the derivatives of motion variables in y-direction. More...

unsigned int	m_outputFrequency

Array< OneD, std::ofstream >	m_outputStream

std::string	m_outputFile_fce

std::string	m_outputFile_mot

Friends
class	MemoryManager< ForcingMovingBody >

Additional Inherited Members
Public Member Functions inherited from Nektar::SolverUtils::Forcing
virtual SOLVER_UTILS_EXPORT	~Forcing ()

SOLVER_UTILS_EXPORT void	InitObject (const Array< OneD, MultiRegions::ExpListSharedPtr > &pFields, const unsigned int &pNumForcingFields, const TiXmlElement *pForce)
	Initialise the forcing object. More...

SOLVER_UTILS_EXPORT void	Apply (const Array< OneD, MultiRegions::ExpListSharedPtr > &fields, const Array< OneD, Array< OneD, NekDouble >> &inarray, Array< OneD, Array< OneD, NekDouble >> &outarray, const NekDouble &time)
	Apply the forcing. More...

SOLVER_UTILS_EXPORT void	PreApply (const Array< OneD, MultiRegions::ExpListSharedPtr > &fields, const Array< OneD, Array< OneD, NekDouble >> &inarray, Array< OneD, Array< OneD, NekDouble >> &outarray, const NekDouble &time)
	Change the advection velocity before applying the forcing. For example, subtracting the frame velocity from the advection velocity in the MovingRefercenceFrame. More...

SOLVER_UTILS_EXPORT void	ApplyCoeff (const Array< OneD, MultiRegions::ExpListSharedPtr > &fields, const Array< OneD, Array< OneD, NekDouble >> &inarray, Array< OneD, Array< OneD, NekDouble >> &outarray, const NekDouble &time)
	Apply the forcing. More...

SOLVER_UTILS_EXPORT const Array< OneD, const Array< OneD, NekDouble > > &	GetForces ()

SOLVER_UTILS_EXPORT Array< OneD, Array< OneD, NekDouble > > &	UpdateForces ()

Detailed Description

Definition at line 49 of file ForcingMovingBody.h.

Constructor & Destructor Documentation

◆ ForcingMovingBody()

Nektar::ForcingMovingBody::ForcingMovingBody	(	const LibUtilities::SessionReaderSharedPtr &	pSession,
		const std::weak_ptr< SolverUtils::EquationSystem > &	pEquation
	)

private

Definition at line 48 of file ForcingMovingBody.cpp.

     : Forcing(pSession, pEquation)
 {
 }

Member Function Documentation

◆ CheckIsFromFile()

void Nektar::ForcingMovingBody::CheckIsFromFile ( const TiXmlElement * pForce )

private

Definition at line 1063 of file ForcingMovingBody.cpp.

 {
  
     m_funcName  = Array<OneD, std::string>(3);
     m_motion    = Array<OneD, std::string>(2);
     m_motion[0] = "x";
     m_motion[1] = "y";
  
     m_IsFromFile = Array<OneD, bool>(6);
     // Loading the x-dispalcement (m_zta) and the y-displacement (m_eta)
     // Those two variables are bith functions of z and t and the may come
     // from an equation (forced vibration) or from another solver which, given
     // the aerodynamic forces at the previous step, calculates the
     // displacements.
  
     // Get the body displacement: m_zta and m_eta
     const TiXmlElement *funcNameElmt_D =
         pForce->FirstChildElement("DISPLACEMENTS");
     ASSERTL0(funcNameElmt_D,
              "MOVINGBODYFORCE tag has to specify a function name which "
              "prescribes the body displacement as d(z,t).");
  
     m_funcName[0] = funcNameElmt_D->GetText();
     ASSERTL0(m_session->DefinesFunction(m_funcName[0]),
              "Function '" + m_funcName[0] + "' not defined.");
  
     // Get the body velocity of movement: d(m_zta)/dt and d(m_eta)/dt
     const TiXmlElement *funcNameElmt_V =
         pForce->FirstChildElement("VELOCITIES");
     ASSERTL0(funcNameElmt_D,
              "MOVINGBODYFORCE tag has to specify a function name which "
              "prescribes the body velocity of movement as v(z,t).");
  
     m_funcName[1] = funcNameElmt_V->GetText();
     ASSERTL0(m_session->DefinesFunction(m_funcName[1]),
              "Function '" + m_funcName[1] + "' not defined.");
  
     // Get the body acceleration: dd(m_zta)/ddt and dd(m_eta)/ddt
     const TiXmlElement *funcNameElmt_A =
         pForce->FirstChildElement("ACCELERATIONS");
     ASSERTL0(funcNameElmt_A,
              "MOVINGBODYFORCE tag has to specify a function name which "
              "prescribes the body acceleration as a(z,t).");
  
     m_funcName[2] = funcNameElmt_A->GetText();
     ASSERTL0(m_session->DefinesFunction(m_funcName[2]),
              "Function '" + m_funcName[2] + "' not defined.");
  
     LibUtilities::FunctionType vType;
  
     // Check Displacement x
     vType = m_session->GetFunctionType(m_funcName[0], m_motion[0]);
     if (vType == LibUtilities::eFunctionTypeExpression)
     {
         m_IsFromFile[0] = false;
     }
     else if (vType == LibUtilities::eFunctionTypeFile)
     {
         m_IsFromFile[0] = true;
     }
     else
     {
         ASSERTL0(false, "The displacements in x must be specified via an "
                         "equation <E> or a file <F>");
     }
  
     // Check Displacement y
     vType = m_session->GetFunctionType(m_funcName[0], m_motion[1]);
     if (vType == LibUtilities::eFunctionTypeExpression)
     {
         m_IsFromFile[1] = false;
     }
     else if (vType == LibUtilities::eFunctionTypeFile)
     {
         m_IsFromFile[1] = true;
     }
     else
     {
         ASSERTL0(false, "The displacements in y must be specified via an "
                         "equation <E> or a file <F>");
     }
  
     // Check Velocity x
     vType = m_session->GetFunctionType(m_funcName[1], m_motion[0]);
     if (vType == LibUtilities::eFunctionTypeExpression)
     {
         m_IsFromFile[2] = false;
     }
     else if (vType == LibUtilities::eFunctionTypeFile)
     {
         m_IsFromFile[2] = true;
     }
     else
     {
         ASSERTL0(false, "The velocities in x must be specified via an equation "
                         "<E> or a file <F>");
     }
  
     // Check Velocity y
     vType = m_session->GetFunctionType(m_funcName[1], m_motion[1]);
     if (vType == LibUtilities::eFunctionTypeExpression)
     {
         m_IsFromFile[3] = false;
     }
     else if (vType == LibUtilities::eFunctionTypeFile)
     {
         m_IsFromFile[3] = true;
     }
     else
     {
         ASSERTL0(false, "The velocities in y must be specified via an equation "
                         "<E> or a file <F>");
     }
  
     // Check Acceleration x
     vType = m_session->GetFunctionType(m_funcName[2], m_motion[0]);
     if (vType == LibUtilities::eFunctionTypeExpression)
     {
         m_IsFromFile[4] = false;
     }
     else if (vType == LibUtilities::eFunctionTypeFile)
     {
         m_IsFromFile[4] = true;
     }
     else
     {
         ASSERTL0(false, "The accelerations in x must be specified via an "
                         "equation <E> or a file <F>");
     }
  
     // Check Acceleration y
     vType = m_session->GetFunctionType(m_funcName[2], m_motion[1]);
     if (vType == LibUtilities::eFunctionTypeExpression)
     {
         m_IsFromFile[5] = false;
     }
     else if (vType == LibUtilities::eFunctionTypeFile)
     {
         m_IsFromFile[5] = true;
     }
     else
     {
         ASSERTL0(false, "The accelerations in y must be specified via an "
                         "equation <E> or a file <F>");
     }
 }

References ASSERTL0, Nektar::LibUtilities::eFunctionTypeExpression, Nektar::LibUtilities::eFunctionTypeFile, m_funcName, m_IsFromFile, m_motion, and Nektar::SolverUtils::Forcing::m_session.

Referenced by v_InitObject().

◆ create()

static SolverUtils::ForcingSharedPtr Nektar::ForcingMovingBody::create	(	const LibUtilities::SessionReaderSharedPtr &	pSession,
		const std::weak_ptr< SolverUtils::EquationSystem > &	pEquation,
		const Array< OneD, MultiRegions::ExpListSharedPtr > &	pFields,
		const unsigned int &	pNumForcingFields,
		const TiXmlElement *	pForce
	)

inlinestatic

Creates an instance of this class.

Definition at line 55 of file ForcingMovingBody.h.

     {
         SolverUtils::ForcingSharedPtr p =
             MemoryManager<ForcingMovingBody>::AllocateSharedPtr(pSession,
                                                                 pEquation);
         p->InitObject(pFields, pNumForcingFields, pForce);
         return p;
     }

References Nektar::MemoryManager< DataType >::AllocateSharedPtr(), Nektar::SolverUtils::ForcingSharedPtr, and CellMLToNektar.cellml_metadata::p.

◆ EvaluateStructDynModel()

void Nektar::ForcingMovingBody::EvaluateStructDynModel	(	const Array< OneD, MultiRegions::ExpListSharedPtr > &	pFields,
		Array< OneD, NekDouble > &	Hydroforces,
		NekDouble	time
	)

private

Definition at line 225 of file ForcingMovingBody.cpp.

 {
     LibUtilities::CommSharedPtr vcomm = pFields[0]->GetComm();
     int colrank                       = vcomm->GetColumnComm()->GetRank();
     int nproc                         = vcomm->GetColumnComm()->GetSize();
  
     bool homostrip;
     m_session->MatchSolverInfo("HomoStrip", "True", homostrip, false);
  
     // number of structral modes and number of strips
     int npts, nstrips;
     if (!homostrip) // full resolutions
     {
         npts = m_session->GetParameter("HomModesZ");
     }
     else
     {
         m_session->LoadParameter("HomStructModesZ", npts);
         m_session->LoadParameter("Strip_Z", nstrips);
  
         // ASSERTL0(nstrips < = npts,
         //     "the number of struct. modes must be larger than that of the
         //     strips.");
     }
  
     // the hydrodynamic forces
     Array<OneD, Array<OneD, NekDouble>> fces(2);
     // forces in x-direction
     fces[0] = Array<OneD, NekDouble>(npts, 0.0);
     // forces in y-direction
     fces[1] = Array<OneD, NekDouble>(npts, 0.0);
  
     // fill the force vectors
     if (colrank == 0)
     {
         if (!homostrip) // full resolutions
         {
             Vmath::Vcopy(m_np, Hydroforces, 1, fces[0], 1);
             Vmath::Vcopy(m_np, Hydroforces + m_np, 1, fces[1], 1);
         }
         else // strip modelling
         {
             fces[0][0] = Hydroforces[0];
             fces[1][0] = Hydroforces[m_np];
         }
  
         if (!homostrip) // full resolutions
         {
             Array<OneD, NekDouble> tmp(2 * m_np);
             for (int i = 1; i < nproc; ++i)
             {
                 vcomm->GetColumnComm()->Recv(i, tmp);
                 for (int n = 0; n < m_np; n++)
                 {
                     for (int j = 0; j < 2; ++j)
                     {
                         fces[j][i * m_np + n] = tmp[j * m_np + n];
                     }
                 }
             }
         }
         else // strip modelling
         // if the body is submerged partly, the fces are filled partly
         // by the flow induced forces
         {
             Array<OneD, NekDouble> tmp(2);
             for (int i = 1; i < nstrips; ++i)
             {
                 vcomm->GetColumnComm()->Recv(i, tmp);
  
                 for (int j = 0; j < 2; ++j)
                 {
                     fces[j][i] = tmp[j];
                 }
             }
         }
     }
     else
     {
         if (!homostrip) // full resolutions
         {
             vcomm->GetColumnComm()->Send(0, Hydroforces);
         }
         else // strip modelling
         {
             for (int i = 1; i < nstrips; ++i)
             {
                 if (colrank == i)
                 {
                     Array<OneD, NekDouble> tmp(2);
                     tmp[0] = Hydroforces[0];
                     tmp[1] = Hydroforces[m_np];
                     vcomm->GetColumnComm()->Send(0, tmp);
                 }
             }
         }
     }
  
     if (colrank == 0)
     {
         // Fictitious mass method used to stablize the explicit coupling at
         // relatively lower mass ratio
         bool fictmass;
         m_session->MatchSolverInfo("FictitiousMassMethod", "True", fictmass,
                                    false);
         if (fictmass)
         {
             NekDouble fictrho, fictdamp;
             m_session->LoadParameter("FictMass", fictrho);
             m_session->LoadParameter("FictDamp", fictdamp);
  
             static NekDouble Betaq_Coeffs[2][2] = {{1.0, 0.0}, {2.0, -1.0}};
  
             // only consider second order approximation for fictitious variables
             int intOrder = 2;
             int nint     = min(m_movingBodyCalls + 1, intOrder);
             int nlevels  = m_fV[0].size();
  
             for (int i = 0; i < m_motion.size(); ++i)
             {
                 RollOver(m_fV[i]);
                 RollOver(m_fA[i]);
  
                 int Voffset = npts;
                 int Aoffset = 2 * npts;
  
                 Vmath::Vcopy(npts, m_MotionVars[i] + Voffset, 1, m_fV[i][0], 1);
                 Vmath::Vcopy(npts, m_MotionVars[i] + Aoffset, 1, m_fA[i][0], 1);
  
                 // Extrapolate to n+1
                 Vmath::Smul(npts, Betaq_Coeffs[nint - 1][nint - 1],
                             m_fV[i][nint - 1], 1, m_fV[i][nlevels - 1], 1);
                 Vmath::Smul(npts, Betaq_Coeffs[nint - 1][nint - 1],
                             m_fA[i][nint - 1], 1, m_fA[i][nlevels - 1], 1);
  
                 for (int n = 0; n < nint - 1; ++n)
                 {
                     Vmath::Svtvp(npts, Betaq_Coeffs[nint - 1][n], m_fV[i][n], 1,
                                  m_fV[i][nlevels - 1], 1, m_fV[i][nlevels - 1],
                                  1);
                     Vmath::Svtvp(npts, Betaq_Coeffs[nint - 1][n], m_fA[i][n], 1,
                                  m_fA[i][nlevels - 1], 1, m_fA[i][nlevels - 1],
                                  1);
                 }
  
                 // Add the fictitious forces on the RHS of the equation
                 Vmath::Svtvp(npts, fictdamp, m_fV[i][nlevels - 1], 1, fces[i],
                              1, fces[i], 1);
                 Vmath::Svtvp(npts, fictrho, m_fA[i][nlevels - 1], 1, fces[i], 1,
                              fces[i], 1);
             }
         }
     }
     // structural solver is implemented on the root process
     if (colrank == 0)
     {
         // Tensioned cable model is evaluated in wave space
         for (int n = 0, cn = 1; n < m_vdim; n++, cn--)
         {
             Newmark_betaSolver(pFields, fces[cn], m_MotionVars[cn]);
         }
     }
  
     Array<OneD, NekDouble> Motvars(2 * 2 * m_np);
     // send physical coeffients to all planes of each processor
     if (!homostrip) // full resolutions
     {
         Array<OneD, NekDouble> tmp(2 * 2 * m_np);
  
         if (colrank != 0)
         {
             vcomm->GetColumnComm()->Recv(0, tmp);
             Vmath::Vcopy(2 * 2 * m_np, tmp, 1, Motvars, 1);
         }
         else
         {
             for (int i = 1; i < nproc; ++i)
             {
                 for (int j = 0; j < 2; j++) // moving dimensions
                 {
                     for (int k = 0; k < 2; k++) // disp. and vel.
                     {
                         for (int n = 0; n < m_np; n++)
                         {
                             tmp[j * 2 * m_np + k * m_np + n] =
                                 m_MotionVars[j][k * npts + i * m_np + n];
                         }
                     }
                 }
                 vcomm->GetColumnComm()->Send(i, tmp);
             }
  
             for (int j = 0; j < 2; j++)
             {
                 for (int k = 0; k < 2; k++)
                 {
                     for (int n = 0; n < m_np; n++)
                     {
                         tmp[j * 2 * m_np + k * m_np + n] =
                             m_MotionVars[j][k * npts + n];
                     }
                     Vmath::Vcopy(2 * 2 * m_np, tmp, 1, Motvars, 1);
                 }
             }
         }
     }
     else // strip modelling
     {
         Array<OneD, NekDouble> tmp(2 * 2);
  
         if (colrank != 0)
         {
             for (int j = 1; j < nproc / nstrips; j++)
             {
                 if (colrank == j * nstrips)
                 {
                     vcomm->GetColumnComm()->Recv(0, tmp);
  
                     for (int plane = 0; plane < m_np; plane++)
                     {
                         for (int var = 0; var < 2; var++)
                         {
                             for (int k = 0; k < 2; k++)
                             {
                                 Motvars[var * 2 * m_np + k * m_np + plane] =
                                     tmp[var * 2 + k];
                             }
                         }
                     }
                 }
             }
  
             for (int i = 1; i < nstrips; i++)
             {
                 for (int j = 0; j < nproc / nstrips; j++)
                 {
                     if (colrank == i + j * nstrips)
                     {
                         vcomm->GetColumnComm()->Recv(0, tmp);
  
                         for (int plane = 0; plane < m_np; plane++)
                         {
                             for (int var = 0; var < 2; var++)
                             {
                                 for (int k = 0; k < 2; k++)
                                 {
                                     Motvars[var * 2 * m_np + k * m_np + plane] =
                                         tmp[var * 2 + k];
                                 }
                             }
                         }
                     }
                 }
             }
         }
         else
         {
             for (int j = 0; j < 2; ++j)
             {
                 for (int k = 0; k < 2; ++k)
                 {
                     tmp[j * 2 + k] = m_MotionVars[j][k * npts];
                 }
             }
  
             for (int j = 1; j < nproc / nstrips; j++)
             {
                 vcomm->GetColumnComm()->Send(j * nstrips, tmp);
             }
  
             for (int plane = 0; plane < m_np; plane++)
             {
                 for (int j = 0; j < 2; j++)
                 {
                     for (int k = 0; k < 2; ++k)
                     {
                         Motvars[j * 2 * m_np + k * m_np + plane] =
                             m_MotionVars[j][k * npts];
                     }
                 }
             }
  
             for (int i = 1; i < nstrips; ++i)
             {
                 for (int j = 0; j < 2; ++j)
                 {
                     for (int k = 0; k < 2; ++k)
                     {
                         tmp[j * 2 + k] = m_MotionVars[j][i + k * npts];
                     }
                 }
  
                 for (int j = 0; j < nproc / nstrips; j++)
                 {
                     vcomm->GetColumnComm()->Send(i + j * nstrips, tmp);
                 }
             }
         }
     }
  
     // Set the m_forcing term based on the motion of the cable
     for (int var = 0; var < 2; var++)
     {
         for (int plane = 0; plane < m_np; plane++)
         {
             int n = pFields[0]->GetPlane(plane)->GetTotPoints();
  
             Array<OneD, NekDouble> tmp;
  
             int offset  = plane * n;
             int xoffset = var * m_np + plane;
             int yoffset = 2 * m_np + xoffset;
  
             Vmath::Fill(n, Motvars[xoffset], tmp = m_zta[var] + offset, 1);
             Vmath::Fill(n, Motvars[yoffset], tmp = m_eta[var] + offset, 1);
         }
     }
 }

References Vmath::Fill(), m_eta, m_fA, m_fV, m_motion, m_MotionVars, m_movingBodyCalls, m_np, Nektar::SolverUtils::Forcing::m_session, m_vdim, m_zta, Newmark_betaSolver(), RollOver(), Vmath::Smul(), Vmath::Svtvp(), and Vmath::Vcopy().

Referenced by v_Apply().

◆ InitialiseCableModel()

void Nektar::ForcingMovingBody::InitialiseCableModel	(	const LibUtilities::SessionReaderSharedPtr &	pSession,
		const Array< OneD, MultiRegions::ExpListSharedPtr > &	pFields
	)

private

Definition at line 677 of file ForcingMovingBody.cpp.

 {
     m_movingBodyCalls = 0;
     m_session->LoadParameter("Kinvis", m_kinvis);
     m_session->LoadParameter("TimeStep", m_timestep, 0.01);
  
     LibUtilities::CommSharedPtr vcomm = pFields[0]->GetComm();
     int colrank                       = vcomm->GetColumnComm()->GetRank();
     int nproc                         = vcomm->GetColumnComm()->GetSize();
  
     // number of structral modes
     int npts;
     bool homostrip;
     m_session->MatchSolverInfo("HomoStrip", "True", homostrip, false);
  
     if (!homostrip) // full resolutions
     {
         npts = m_session->GetParameter("HomModesZ");
     }
     else
     {
         m_session->LoadParameter("HomStructModesZ", npts);
     }
  
     m_MotionVars    = Array<OneD, Array<OneD, NekDouble>>(2);
     m_MotionVars[0] = Array<OneD, NekDouble>(3 * npts, 0.0);
     m_MotionVars[1] = Array<OneD, NekDouble>(3 * npts, 0.0);
  
     Array<OneD, unsigned int> ZIDs;
     ZIDs = pFields[0]->GetZIDs();
     m_np = ZIDs.size();
  
     std::string vibtype = m_session->GetSolverInfo("VibrationType");
  
     if (boost::iequals(vibtype, "Constrained"))
     {
         m_vdim = 1;
     }
     else if (boost::iequals(vibtype, "Free"))
     {
         m_vdim = 2;
     }
     else if (boost::iequals(vibtype, "Forced"))
     {
         m_vdim = 0;
         return;
     }
  
     if (!homostrip)
     {
         m_session->LoadParameter("LZ", m_lhom);
         int nplanes = m_session->GetParameter("HomModesZ");
         m_FFT = LibUtilities::GetNektarFFTFactory().CreateInstance("NekFFTW",
                                                                    nplanes);
     }
     else
     {
         int nstrips;
         NekDouble DistStrip;
  
         m_session->LoadParameter("DistStrip", DistStrip);
         m_session->LoadParameter("Strip_Z", nstrips);
         m_lhom = nstrips * DistStrip;
         m_FFT  = LibUtilities::GetNektarFFTFactory().CreateInstance("NekFFTW",
                                                                    nstrips);
     }
  
     // load the structural dynamic parameters from xml file
     m_session->LoadParameter("StructRho", m_structrho);
     m_session->LoadParameter("StructDamp", m_structdamp, 0.0);
  
     // Identify whether the fictitious mass method is active for explicit
     // coupling of fluid solver and structural dynamics solver
     bool fictmass;
     m_session->MatchSolverInfo("FictitiousMassMethod", "True", fictmass, false);
     if (fictmass)
     {
         NekDouble fictrho, fictdamp;
         m_session->LoadParameter("FictMass", fictrho);
         m_session->LoadParameter("FictDamp", fictdamp);
         m_structrho += fictrho;
         m_structdamp += fictdamp;
  
         // Storage array of Struct Velocity and Acceleration used for
         // extrapolation of fictitious force
         m_fV = Array<OneD, Array<OneD, Array<OneD, NekDouble>>>(2);
         m_fA = Array<OneD, Array<OneD, Array<OneD, NekDouble>>>(2);
         for (int i = 0; i < m_motion.size(); ++i)
         {
             m_fV[i] = Array<OneD, Array<OneD, NekDouble>>(2);
             m_fA[i] = Array<OneD, Array<OneD, NekDouble>>(2);
  
             for (int n = 0; n < 2; ++n)
             {
                 m_fV[i][n] = Array<OneD, NekDouble>(npts, 0.0);
                 m_fA[i][n] = Array<OneD, NekDouble>(npts, 0.0);
             }
         }
     }
  
     // Setting the coefficient matrices for solving structural dynamic ODEs
     SetDynEqCoeffMatrix(pFields);
  
     // Set initial condition for cable's motion
     int cnt = 0;
  
     for (int j = 0; j < m_funcName.size(); j++)
     {
         // loading from the specified files through inputstream
         if (m_IsFromFile[cnt] && m_IsFromFile[cnt + 1])
         {
             std::ifstream inputStream;
             int nzpoints;
  
             if (homostrip)
             {
                 m_session->LoadParameter("HomStructModesZ", nzpoints);
             }
             else
             {
                 nzpoints = pFields[0]->GetHomogeneousBasis()->GetNumModes();
             }
  
             if (vcomm->GetRank() == 0)
             {
                 std::string filename =
                     m_session->GetFunctionFilename(m_funcName[j], m_motion[0]);
  
                 // Open intputstream for cable motions
                 inputStream.open(filename.c_str());
  
                 // Import the head string from the file
                 Array<OneD, std::string> tmp(9);
                 for (int n = 0; n < tmp.size(); n++)
                 {
                     inputStream >> tmp[n];
                 }
  
                 NekDouble time, z_cds;
                 // Import the motion variables from the file
                 for (int n = 0; n < nzpoints; n++)
                 {
                     inputStream >> setprecision(6) >> time;
                     inputStream >> setprecision(6) >> z_cds;
                     inputStream >> setprecision(8) >> m_MotionVars[0][n];
                     inputStream >> setprecision(8) >>
                         m_MotionVars[0][n + nzpoints];
                     inputStream >> setprecision(8) >>
                         m_MotionVars[0][n + 2 * nzpoints];
                     inputStream >> setprecision(8) >> m_MotionVars[1][n];
                     inputStream >> setprecision(8) >>
                         m_MotionVars[1][n + nzpoints];
                     inputStream >> setprecision(8) >>
                         m_MotionVars[1][n + 2 * nzpoints];
                 }
                 // Close inputstream for cable motions
                 inputStream.close();
             }
             cnt = cnt + 2;
         }
         else // Evaluate from the functions specified in xml file
         {
             if (!homostrip)
             {
                 int nzpoints = pFields[0]->GetHomogeneousBasis()->GetNumModes();
                 Array<OneD, NekDouble> z_coords(nzpoints, 0.0);
                 Array<OneD, const NekDouble> pts =
                     pFields[0]->GetHomogeneousBasis()->GetZ();
  
                 Vmath::Smul(nzpoints, m_lhom / 2.0, pts, 1, z_coords, 1);
                 Vmath::Sadd(nzpoints, m_lhom / 2.0, z_coords, 1, z_coords, 1);
  
                 Array<OneD, NekDouble> x0(m_np, 0.0);
                 Array<OneD, NekDouble> x1(m_np, 0.0);
                 Array<OneD, NekDouble> x2(m_np, 0.0);
                 for (int plane = 0; plane < m_np; plane++)
                 {
                     x2[plane] = z_coords[ZIDs[plane]];
                 }
  
                 Array<OneD, NekDouble> tmp(m_np, 0.0);
                 Array<OneD, NekDouble> tmp0(m_np, 0.0);
                 Array<OneD, NekDouble> tmp1(m_np, 0.0);
                 LibUtilities::EquationSharedPtr ffunc0, ffunc1;
  
                 ffunc0 = m_session->GetFunction(m_funcName[j], m_motion[0]);
                 ffunc1 = m_session->GetFunction(m_funcName[j], m_motion[1]);
                 ffunc0->Evaluate(x0, x1, x2, 0.0, tmp0);
                 ffunc1->Evaluate(x0, x1, x2, 0.0, tmp1);
  
                 int offset = j * npts;
                 Vmath::Vcopy(m_np, tmp0, 1, tmp = m_MotionVars[0] + offset, 1);
                 Vmath::Vcopy(m_np, tmp1, 1, tmp = m_MotionVars[1] + offset, 1);
  
                 if (colrank == 0)
                 {
                     for (int i = 1; i < nproc; ++i)
                     {
                         vcomm->GetColumnComm()->Recv(i, tmp0);
                         vcomm->GetColumnComm()->Recv(i, tmp1);
                         Vmath::Vcopy(m_np, tmp0, 1,
                                      tmp = m_MotionVars[0] + offset + i * m_np,
                                      1);
                         Vmath::Vcopy(m_np, tmp1, 1,
                                      tmp = m_MotionVars[1] + offset + i * m_np,
                                      1);
                     }
                 }
                 else
                 {
                     vcomm->GetColumnComm()->Send(0, tmp0);
                     vcomm->GetColumnComm()->Send(0, tmp1);
                 }
             }
             else
             {
                 if (colrank == 0)
                 {
                     int nstrips;
                     m_session->LoadParameter("Strip_Z", nstrips);
  
                     ASSERTL0(
                         m_session->DefinesSolverInfo("USEFFT"),
                         "Fourier transformation of cable motion is currently "
                         "implemented only for FFTW module.");
  
                     NekDouble DistStrip;
                     m_session->LoadParameter("DistStrip", DistStrip);
  
                     Array<OneD, NekDouble> x0(npts, 0.0);
                     Array<OneD, NekDouble> x1(npts, 0.0);
                     Array<OneD, NekDouble> x2(npts, 0.0);
                     Array<OneD, NekDouble> tmp(npts, 0.0);
                     Array<OneD, NekDouble> tmp0(npts, 0.0);
                     Array<OneD, NekDouble> tmp1(npts, 0.0);
                     for (int plane = 0; plane < npts; plane++)
                     {
                         x2[plane] = plane * DistStrip;
                     }
                     LibUtilities::EquationSharedPtr ffunc0, ffunc1;
                     ffunc0 = m_session->GetFunction(m_funcName[j], m_motion[0]);
                     ffunc1 = m_session->GetFunction(m_funcName[j], m_motion[1]);
                     ffunc0->Evaluate(x0, x1, x2, 0.0, tmp0);
                     ffunc1->Evaluate(x0, x1, x2, 0.0, tmp1);
  
                     int offset = j * npts;
                     Vmath::Vcopy(npts, tmp0, 1, tmp = m_MotionVars[0] + offset,
                                  1);
                     Vmath::Vcopy(npts, tmp1, 1, tmp = m_MotionVars[1] + offset,
                                  1);
                 }
             }
  
             cnt = cnt + 2;
         }
     }
 }

References ASSERTL0, Nektar::LibUtilities::NekFactory< tKey, tBase, tParam >::CreateInstance(), Nektar::LibUtilities::GetNektarFFTFactory(), m_fA, m_FFT, m_funcName, m_fV, m_IsFromFile, m_kinvis, m_lhom, m_motion, m_MotionVars, m_movingBodyCalls, m_np, Nektar::SolverUtils::Forcing::m_session, m_structdamp, m_structrho, m_timestep, m_vdim, Vmath::Sadd(), SetDynEqCoeffMatrix(), Vmath::Smul(), and Vmath::Vcopy().

Referenced by v_InitObject().

◆ InitialiseFilter()

void Nektar::ForcingMovingBody::InitialiseFilter	(	const LibUtilities::SessionReaderSharedPtr &	pSession,
		const Array< OneD, MultiRegions::ExpListSharedPtr > &	pFields,
		const TiXmlElement *	pForce
	)

private

Definition at line 1213 of file ForcingMovingBody.cpp.

 {
     // Get the outputfile name, output frequency and
     // the boundary's ID for the cable's wall
     std::string typeStr = pForce->Attribute("TYPE");
     std::map<std::string, std::string> vParams;
  
     const TiXmlElement *param = pForce->FirstChildElement("PARAM");
     while (param)
     {
         ASSERTL0(param->Attribute("NAME"),
                  "Missing attribute 'NAME' for parameter in filter " + typeStr +
                      "'.");
         std::string nameStr = param->Attribute("NAME");
  
         ASSERTL0(param->GetText(), "Empty value string for param.");
         std::string valueStr = param->GetText();
  
         vParams[nameStr] = valueStr;
  
         param = param->NextSiblingElement("PARAM");
     }
  
     // Creat the filter for MovingBody, where we performed the calculation of
     // fluid forces and write both the aerodynamic forces and motion variables
     // into the output files
     m_MovBodyfilter = MemoryManager<FilterMovingBody>::AllocateSharedPtr(
         pSession, m_equ, vParams);
  
     // Initialise the object of MovingBody filter
     m_MovBodyfilter->Initialise(pFields, 0.0);
 }

References Nektar::MemoryManager< DataType >::AllocateSharedPtr(), ASSERTL0, Nektar::SolverUtils::Forcing::m_equ, and m_MovBodyfilter.

Referenced by v_InitObject().

◆ Newmark_betaSolver()

void Nektar::ForcingMovingBody::Newmark_betaSolver	(	const Array< OneD, MultiRegions::ExpListSharedPtr > &	pFields,
		Array< OneD, NekDouble > &	FcePhysinArray,
		Array< OneD, NekDouble > &	MotPhysinArray
	)

private

Definition at line 549 of file ForcingMovingBody.cpp.

 {
     std::string supptype = m_session->GetSolverInfo("SupportType");
  
     int npts = HydroForces.size();
  
     Array<OneD, Array<OneD, NekDouble>> fft_i(4);
     Array<OneD, Array<OneD, NekDouble>> fft_o(4);
  
     for (int i = 0; i < 4; i++)
     {
         fft_i[i] = Array<OneD, NekDouble>(npts, 0.0);
         fft_o[i] = Array<OneD, NekDouble>(npts, 0.0);
     }
  
     Vmath::Vcopy(npts, HydroForces, 1, fft_i[0], 1);
     for (int i = 0; i < 3; i++)
     {
         Vmath::Vcopy(npts, BodyMotions + i * npts, 1, fft_i[i + 1], 1);
     }
  
     // Implement Fourier transformation of the motion variables
     if (boost::iequals(supptype, "Free-Free"))
     {
         for (int j = 0; j < 4; ++j)
         {
             m_FFT->FFTFwdTrans(fft_i[j], fft_o[j]);
         }
     }
     else if (boost::iequals(supptype, "Pinned-Pinned"))
     {
         // TODO:
         int N = fft_i[0].size();
  
         for (int var = 0; var < 4; var++)
         {
             for (int i = 0; i < N; i++)
             {
                 fft_o[var][i] = 0;
  
                 for (int k = 0; k < N; k++)
                 {
                     fft_o[var][i] +=
                         fft_i[var][k] * sin(M_PI / (N) * (k + 1 / 2) * (i + 1));
                 }
             }
         }
     }
     else
     {
         ASSERTL0(false, "Unrecognized support type for cable's motion");
     }
  
     // solve the ODE in the wave space
     for (int i = 0; i < npts; ++i)
     {
         int nrows = 3;
  
         Array<OneD, NekDouble> tmp0, tmp1, tmp2;
         tmp0 = Array<OneD, NekDouble>(3, 0.0);
         tmp1 = Array<OneD, NekDouble>(3, 0.0);
         tmp2 = Array<OneD, NekDouble>(3, 0.0);
  
         for (int var = 0; var < 3; var++)
         {
             tmp0[var] = fft_o[var + 1][i];
         }
  
         tmp2[0] = fft_o[0][i];
  
         Blas::Dgemv('N', nrows, nrows, 1.0, &(m_CoeffMat_B[i]->GetPtr())[0],
                     nrows, &tmp0[0], 1, 0.0, &tmp1[0], 1);
         Blas::Dgemv('N', nrows, nrows, 1.0 / m_structrho,
                     &(m_CoeffMat_A[i]->GetPtr())[0], nrows, &tmp2[0], 1, 1.0,
                     &tmp1[0], 1);
  
         for (int var = 0; var < 3; var++)
         {
             fft_i[var][i] = tmp1[var];
         }
     }
  
     // get physical coeffients via Backward fourier transformation of wave
     // coefficients
     if (boost::iequals(supptype, "Free-Free"))
     {
         for (int var = 0; var < 3; var++)
         {
             m_FFT->FFTBwdTrans(fft_i[var], fft_o[var]);
         }
     }
     else if (boost::iequals(supptype, "Pinned-Pinned"))
     {
         // TODO:
         int N = fft_i[0].size();
  
         for (int var = 0; var < 3; var++)
         {
             for (int i = 0; i < N; i++)
             {
                 fft_o[var][i] = 0;
  
                 for (int k = 0; k < N; k++)
                 {
                     fft_o[var][i] += fft_i[var][k] *
                                      sin(M_PI / (N) * (k + 1) * (i + 1 / 2)) *
                                      2 / N;
                 }
             }
         }
     }
     else
     {
         ASSERTL0(false, "Unrecognized support type for cable's motion");
     }
  
     for (int i = 0; i < 3; i++)
     {
         Array<OneD, NekDouble> tmp(npts, 0.0);
         Vmath::Vcopy(npts, fft_o[i], 1, tmp = BodyMotions + i * npts, 1);
     }
 }

References ASSERTL0, Blas::Dgemv(), m_CoeffMat_A, m_CoeffMat_B, m_FFT, Nektar::SolverUtils::Forcing::m_session, m_structrho, and Vmath::Vcopy().

Referenced by EvaluateStructDynModel().

◆ RollOver()

void Nektar::ForcingMovingBody::RollOver ( Array< OneD, Array< OneD, NekDouble >> & input )

private

Function to roll time-level storages to the next step layout. The stored data associated with the oldest time-level (not required anymore) are moved to the top, where they will be overwritten as the solution process progresses.

Definition at line 1045 of file ForcingMovingBody.cpp.

 {
     int nlevels = input.size();
  
     Array<OneD, NekDouble> tmp;
     tmp = input[nlevels - 1];
  
     for (int n = nlevels - 1; n > 0; --n)
     {
         input[n] = input[n - 1];
     }
  
     input[0] = tmp;
 }

Referenced by EvaluateStructDynModel().

◆ SetDynEqCoeffMatrix()

void Nektar::ForcingMovingBody::SetDynEqCoeffMatrix ( const Array< OneD, MultiRegions::ExpListSharedPtr > & pFields )

private

Definition at line 940 of file ForcingMovingBody.cpp.

 {
     int nplanes;
  
     bool homostrip;
     m_session->MatchSolverInfo("HomoStrip", "True", homostrip, false);
  
     if (!homostrip)
     {
         nplanes = m_session->GetParameter("HomModesZ");
     }
     else
     {
         m_session->LoadParameter("Strip_Z", nplanes);
     }
  
     m_CoeffMat_A = Array<OneD, DNekMatSharedPtr>(nplanes);
     m_CoeffMat_B = Array<OneD, DNekMatSharedPtr>(nplanes);
  
     NekDouble tmp1, tmp2, tmp3;
     NekDouble tmp4, tmp5, tmp6, tmp7;
  
     // load the structural dynamic parameters from xml file
     NekDouble cabletension;
     NekDouble bendingstiff;
     NekDouble structstiff;
     m_session->LoadParameter("StructStiff", structstiff, 0.0);
     m_session->LoadParameter("CableTension", cabletension, 0.0);
     m_session->LoadParameter("BendingStiff", bendingstiff, 0.0);
  
     tmp1 = m_timestep * m_timestep;
     tmp2 = structstiff / m_structrho;
     tmp3 = m_structdamp / m_structrho;
     tmp4 = cabletension / m_structrho;
     tmp5 = bendingstiff / m_structrho;
  
     // solve the ODE in the wave space for cable motion to obtain disp, vel and
     // accel
  
     std::string supptype = m_session->GetSolverInfo("SupportType");
  
     for (int plane = 0; plane < nplanes; plane++)
     {
         int nel = 3;
         m_CoeffMat_A[plane] =
             MemoryManager<DNekMat>::AllocateSharedPtr(nel, nel);
         m_CoeffMat_B[plane] =
             MemoryManager<DNekMat>::AllocateSharedPtr(nel, nel);
  
         // Initialised to avoid compiler warnings.
         unsigned int K = 0;
         NekDouble beta = 0.0;
  
         if (boost::iequals(supptype, "Free-Free"))
         {
             K    = plane / 2;
             beta = 2.0 * M_PI / m_lhom;
         }
         else if (boost::iequals(supptype, "Pinned-Pinned"))
         {
             K    = plane + 1;
             beta = M_PI / m_lhom;
         }
         else
         {
             ASSERTL0(false, "Unrecognized support type for cable's motion");
         }
  
         tmp6 = beta * K;
         tmp6 = tmp6 * tmp6;
         tmp7 = tmp6 * tmp6;
         tmp7 = tmp2 + tmp4 * tmp6 + tmp5 * tmp7;
  
         (*m_CoeffMat_A[plane])(0, 0) = tmp7;
         (*m_CoeffMat_A[plane])(0, 1) = tmp3;
         (*m_CoeffMat_A[plane])(0, 2) = 1.0;
         (*m_CoeffMat_A[plane])(1, 0) = 0.0;
         (*m_CoeffMat_A[plane])(1, 1) = 1.0;
         (*m_CoeffMat_A[plane])(1, 2) = -m_timestep / 2.0;
         (*m_CoeffMat_A[plane])(2, 0) = 1.0;
         (*m_CoeffMat_A[plane])(2, 1) = 0.0;
         (*m_CoeffMat_A[plane])(2, 2) = -tmp1 / 4.0;
         (*m_CoeffMat_B[plane])(0, 0) = 0.0;
         (*m_CoeffMat_B[plane])(0, 1) = 0.0;
         (*m_CoeffMat_B[plane])(0, 2) = 0.0;
         (*m_CoeffMat_B[plane])(1, 0) = 0.0;
         (*m_CoeffMat_B[plane])(1, 1) = 1.0;
         (*m_CoeffMat_B[plane])(1, 2) = m_timestep / 2.0;
         (*m_CoeffMat_B[plane])(2, 0) = 1.0;
         (*m_CoeffMat_B[plane])(2, 1) = m_timestep;
         (*m_CoeffMat_B[plane])(2, 2) = tmp1 / 4.0;
  
         m_CoeffMat_A[plane]->Invert();
         (*m_CoeffMat_B[plane]) =
             (*m_CoeffMat_A[plane]) * (*m_CoeffMat_B[plane]);
     }
 }

References Nektar::MemoryManager< DataType >::AllocateSharedPtr(), ASSERTL0, Nektar::LibUtilities::beta, m_CoeffMat_A, m_CoeffMat_B, m_lhom, Nektar::SolverUtils::Forcing::m_session, m_structdamp, m_structrho, and m_timestep.

Referenced by InitialiseCableModel().

◆ v_Apply()

void Nektar::ForcingMovingBody::v_Apply	(	const Array< OneD, MultiRegions::ExpListSharedPtr > &	fields,
		const Array< OneD, Array< OneD, NekDouble >> &	inarray,
		Array< OneD, Array< OneD, NekDouble >> &	outarray,
		const NekDouble &	time
	)

protectedvirtual

Implements Nektar::SolverUtils::Forcing.

Definition at line 102 of file ForcingMovingBody.cpp.

 {
     // Update the forces from the calculation of fluid field, which is
     // implemented in the movingbody filter
     Array<OneD, NekDouble> Hydroforces(2 * m_np, 0.0);
     m_MovBodyfilter->UpdateForce(m_session, pFields, Hydroforces, time);
  
     // for "free" type (m_vdim = 2), the cable vibrates both in streamwise and
     // crossflow dimections, for "constrained" type (m_vdim = 1), the cable only
     // vibrates in crossflow dimection, and for "forced" type (m_vdim = 0), the
     // calbe vibrates specifically along a given function or file
     if (m_vdim == 1 || m_vdim == 2)
     {
         // For free vibration case, displacements, velocities and acceleartions
         // are obtained through solving structure dynamic model
         EvaluateStructDynModel(pFields, Hydroforces, time);
  
         // Convert result to format required by mapping
         int physTot = pFields[0]->GetTotPoints();
         Array<OneD, Array<OneD, NekDouble>> coords(3);
         Array<OneD, Array<OneD, NekDouble>> coordsVel(3);
         for (int i = 0; i < 3; i++)
         {
             coords[i]    = Array<OneD, NekDouble>(physTot, 0.0);
             coordsVel[i] = Array<OneD, NekDouble>(physTot, 0.0);
         }
         // Get original coordinates
         pFields[0]->GetCoords(coords[0], coords[1], coords[2]);
  
         // Add displacement to coordinates
         Vmath::Vadd(physTot, coords[0], 1, m_zta[0], 1, coords[0], 1);
         Vmath::Vadd(physTot, coords[1], 1, m_eta[0], 1, coords[1], 1);
         // Copy velocities
         Vmath::Vcopy(physTot, m_zta[1], 1, coordsVel[0], 1);
         Vmath::Vcopy(physTot, m_eta[1], 1, coordsVel[1], 1);
  
         // Update mapping
         m_mapping->UpdateMapping(time, coords, coordsVel);
     }
     else if (m_vdim == 0)
     {
         // For forced vibration case, load from specified file or function
         int cnt = 0;
         for (int j = 0; j < m_funcName.size(); j++)
         {
             if (m_IsFromFile[cnt] && m_IsFromFile[cnt + 1])
             {
                 ASSERTL0(false, "Motion loading from file needs specific "
                                 "implementation: Work in Progress!");
             }
             else
             {
                 GetFunction(pFields, m_session, m_funcName[j], true)
                     ->Evaluate(m_motion[0], m_zta[j], time);
                 GetFunction(pFields, m_session, m_funcName[j], true)
                     ->Evaluate(m_motion[1], m_eta[j], time);
                 cnt = cnt + 2;
             }
         }
  
         // Update mapping
         m_mapping->UpdateMapping(time);
  
         // Convert result from mapping
         int physTot = pFields[0]->GetTotPoints();
         Array<OneD, Array<OneD, NekDouble>> coords(3);
         Array<OneD, Array<OneD, NekDouble>> coordsVel(3);
         for (int i = 0; i < 3; i++)
         {
             coords[i]    = Array<OneD, NekDouble>(physTot, 0.0);
             coordsVel[i] = Array<OneD, NekDouble>(physTot, 0.0);
         }
         // Get original coordinates
         pFields[0]->GetCoords(coords[0], coords[1], coords[2]);
  
         // Get Coordinates and coord velocity from mapping
         m_mapping->GetCartesianCoordinates(m_zta[0], m_eta[0], coords[2]);
         m_mapping->GetCoordVelocity(coordsVel);
  
         // Calculate displacement
         Vmath::Vsub(physTot, m_zta[0], 1, coords[0], 1, m_zta[0], 1);
         Vmath::Vsub(physTot, m_eta[0], 1, coords[1], 1, m_eta[0], 1);
  
         Vmath::Vcopy(physTot, coordsVel[0], 1, m_zta[1], 1);
         Vmath::Vcopy(physTot, coordsVel[1], 1, m_eta[1], 1);
  
         for (int var = 0; var < 3; var++)
         {
             for (int plane = 0; plane < m_np; plane++)
             {
                 int n      = pFields[0]->GetPlane(plane)->GetTotPoints();
                 int offset = plane * n;
                 int Offset = var * m_np + plane;
  
                 m_MotionVars[0][Offset] = m_zta[var][offset];
                 m_MotionVars[1][Offset] = m_eta[var][offset];
             }
         }
     }
     else
     {
         ASSERTL0(false, "Unrecogized vibration type for cable's dynamic model");
     }
  
     LibUtilities::CommSharedPtr vcomm = pFields[0]->GetComm();
     int colrank                       = vcomm->GetColumnComm()->GetRank();
     // Pass the variables of the cable's motion to the movingbody filter
     if (colrank == 0)
     {
         int n = m_MotionVars[0].size();
         Array<OneD, NekDouble> tmpArray(2 * n), tmp(n);
         Vmath::Vcopy(n, m_MotionVars[0], 1, tmpArray, 1);
         Vmath::Vcopy(n, m_MotionVars[1], 1, tmp = tmpArray + n, 1);
         m_MovBodyfilter->UpdateMotion(m_session, pFields, tmpArray, time);
     }
 }

References ASSERTL0, EvaluateStructDynModel(), Nektar::SolverUtils::Forcing::GetFunction(), m_eta, m_funcName, m_IsFromFile, m_mapping, m_motion, m_MotionVars, m_MovBodyfilter, m_np, Nektar::SolverUtils::Forcing::m_session, m_vdim, m_zta, Vmath::Vadd(), Vmath::Vcopy(), and Vmath::Vsub().

◆ v_InitObject()

void Nektar::ForcingMovingBody::v_InitObject	(	const Array< OneD, MultiRegions::ExpListSharedPtr > &	pFields,
		const unsigned int &	pNumForcingFields,
		const TiXmlElement *	pForce
	)

protectedvirtual

Implements Nektar::SolverUtils::Forcing.

Definition at line 55 of file ForcingMovingBody.cpp.

 {
     // Just 3D homogenous 1D problems can use this techinque
     ASSERTL0(pFields[0]->GetExpType() == MultiRegions::e3DH1D,
              "Moving body implemented just for 3D Homogenous 1D expansions.");
  
     // At this point we know in the xml file where those quantities
     // are declared (equation or file) - via a function name which is now
     // stored in funcNameD etc. We need now to fill in with this info the
     // m_zta and m_eta vectors (actuallythey are matrices) Array to control if
     // the motion is determined by an equation or is from a file.(not Nektar++)
     // check if we need to load a file or we have an equation
     CheckIsFromFile(pForce);
  
     // Initialise movingbody filter
     InitialiseFilter(m_session, pFields, pForce);
  
     // Initialise the cable model
     InitialiseCableModel(m_session, pFields);
  
     // Load mapping
     m_mapping = GlobalMapping::Mapping::Load(m_session, pFields);
     m_mapping->SetTimeDependent(true);
  
     if (m_vdim > 0)
     {
         m_mapping->SetFromFunction(false);
     }
  
     m_zta = Array<OneD, Array<OneD, NekDouble>>(3);
     m_eta = Array<OneD, Array<OneD, NekDouble>>(3);
     // What are this bi-dimensional vectors
     // ------------------------------------------ m_zta[0] = m_zta |  m_eta[0] =
     // m_eta                      | m_zta[1] = d(m_zta)/dt               |
     // m_eta[1] = d(m_eta)/dt                | m_zta[2] = dd(m_zta)/ddtt |
     // m_eta[2] = dd(m_eta)/ddtt             |
     //--------------------------------------------------------------------------------
     int phystot = pFields[0]->GetTotPoints();
     for (int i = 0; i < m_zta.size(); i++)
     {
         m_zta[i] = Array<OneD, NekDouble>(phystot, 0.0);
         m_eta[i] = Array<OneD, NekDouble>(phystot, 0.0);
     }
 }

References ASSERTL0, CheckIsFromFile(), Nektar::MultiRegions::e3DH1D, InitialiseCableModel(), InitialiseFilter(), Nektar::GlobalMapping::Mapping::Load(), m_eta, m_mapping, Nektar::SolverUtils::Forcing::m_session, m_vdim, and m_zta.

Friends And Related Function Documentation

◆ MemoryManager< ForcingMovingBody >

friend class MemoryManager< ForcingMovingBody >

friend

Definition at line 1 of file ForcingMovingBody.h.

Member Data Documentation

◆ className

std::string Nektar::ForcingMovingBody::className

static

Initial value:

=
    SolverUtils::GetForcingFactory().RegisterCreatorFunction(
        "MovingBody", ForcingMovingBody::create, "Moving Body Forcing")

Name of the class.

Definition at line 69 of file ForcingMovingBody.h.

◆ m_Aeroforces

Array<OneD, NekDouble> Nektar::ForcingMovingBody::m_Aeroforces

private

storage for the cable's force(x,y) variables

Definition at line 128 of file ForcingMovingBody.h.

◆ m_CoeffMat_A

Array<OneD, DNekMatSharedPtr> Nektar::ForcingMovingBody::m_CoeffMat_A

private

matrices in Newmart-beta method

Definition at line 136 of file ForcingMovingBody.h.

Referenced by Newmark_betaSolver(), and SetDynEqCoeffMatrix().

◆ m_CoeffMat_B

Array<OneD, DNekMatSharedPtr> Nektar::ForcingMovingBody::m_CoeffMat_B

private

matrices in Newmart-beta method

Definition at line 138 of file ForcingMovingBody.h.

Referenced by Newmark_betaSolver(), and SetDynEqCoeffMatrix().

◆ m_eta

Array<OneD, Array<OneD, NekDouble> > Nektar::ForcingMovingBody::m_eta

private

Store the derivatives of motion variables in y-direction.

Definition at line 148 of file ForcingMovingBody.h.

Referenced by EvaluateStructDynModel(), v_Apply(), and v_InitObject().

◆ m_fA

Array<OneD, Array<OneD, Array<OneD, NekDouble> > > Nektar::ForcingMovingBody::m_fA

private

fictitious acceleration storage

Definition at line 134 of file ForcingMovingBody.h.

Referenced by EvaluateStructDynModel(), and InitialiseCableModel().

◆ m_FFT

LibUtilities::NektarFFTSharedPtr Nektar::ForcingMovingBody::m_FFT

private

Definition at line 124 of file ForcingMovingBody.h.

Referenced by InitialiseCableModel(), and Newmark_betaSolver().

◆ m_funcName

Array<OneD, std::string> Nektar::ForcingMovingBody::m_funcName

private

[0] is displacements, [1] is velocities, [2] is accelerations

Definition at line 140 of file ForcingMovingBody.h.

Referenced by CheckIsFromFile(), InitialiseCableModel(), and v_Apply().

◆ m_fV

Array<OneD, Array<OneD, Array<OneD, NekDouble> > > Nektar::ForcingMovingBody::m_fV

private

fictitious velocity storage

Definition at line 132 of file ForcingMovingBody.h.

Referenced by EvaluateStructDynModel(), and InitialiseCableModel().

◆ m_IsFromFile

Array<OneD, bool> Nektar::ForcingMovingBody::m_IsFromFile

private

do determine if the the body motion come from an extern file

Definition at line 144 of file ForcingMovingBody.h.

Referenced by CheckIsFromFile(), InitialiseCableModel(), and v_Apply().

◆ m_kinvis

NekDouble Nektar::ForcingMovingBody::m_kinvis

private

fluid viscous

Definition at line 121 of file ForcingMovingBody.h.

Referenced by InitialiseCableModel().

◆ m_lhom

NekDouble Nektar::ForcingMovingBody::m_lhom

private

length ratio of the cable

Definition at line 120 of file ForcingMovingBody.h.

Referenced by InitialiseCableModel(), and SetDynEqCoeffMatrix().

◆ m_mapping

GlobalMapping::MappingSharedPtr Nektar::ForcingMovingBody::m_mapping

protected

Definition at line 73 of file ForcingMovingBody.h.

Referenced by v_Apply(), and v_InitObject().

◆ m_motion

Array<OneD, std::string> Nektar::ForcingMovingBody::m_motion

private

motion direction: [0] is 'x' and [1] is 'y'

Definition at line 142 of file ForcingMovingBody.h.

Referenced by CheckIsFromFile(), EvaluateStructDynModel(), InitialiseCableModel(), and v_Apply().

◆ m_MotionVars

Array<OneD, Array<OneD, NekDouble> > Nektar::ForcingMovingBody::m_MotionVars

private

storage for the cable's motion(x,y) variables

Definition at line 130 of file ForcingMovingBody.h.

Referenced by EvaluateStructDynModel(), InitialiseCableModel(), and v_Apply().

◆ m_MovBodyfilter

FilterMovingBodySharedPtr Nektar::ForcingMovingBody::m_MovBodyfilter

private

Definition at line 126 of file ForcingMovingBody.h.

Referenced by InitialiseFilter(), and v_Apply().

◆ m_movingBodyCalls

int Nektar::ForcingMovingBody::m_movingBodyCalls

private

number of times the movbody have been called

Definition at line 114 of file ForcingMovingBody.h.

Referenced by EvaluateStructDynModel(), and InitialiseCableModel().

◆ m_np

int Nektar::ForcingMovingBody::m_np

private

number of planes per processors

Definition at line 115 of file ForcingMovingBody.h.

Referenced by EvaluateStructDynModel(), InitialiseCableModel(), and v_Apply().

◆ m_outputFile_fce

std::string Nektar::ForcingMovingBody::m_outputFile_fce

private

Definition at line 152 of file ForcingMovingBody.h.

◆ m_outputFile_mot

std::string Nektar::ForcingMovingBody::m_outputFile_mot

private

Definition at line 153 of file ForcingMovingBody.h.

◆ m_outputFrequency

unsigned int Nektar::ForcingMovingBody::m_outputFrequency

private

Definition at line 150 of file ForcingMovingBody.h.

◆ m_outputStream

Array<OneD, std::ofstream> Nektar::ForcingMovingBody::m_outputStream

private

Definition at line 151 of file ForcingMovingBody.h.

◆ m_structdamp

NekDouble Nektar::ForcingMovingBody::m_structdamp

private

damping ratio of the cable

Definition at line 119 of file ForcingMovingBody.h.

Referenced by InitialiseCableModel(), and SetDynEqCoeffMatrix().

◆ m_structrho

NekDouble Nektar::ForcingMovingBody::m_structrho

private

mass of the cable per unit length

Definition at line 118 of file ForcingMovingBody.h.

Referenced by InitialiseCableModel(), Newmark_betaSolver(), and SetDynEqCoeffMatrix().

◆ m_timestep

NekDouble Nektar::ForcingMovingBody::m_timestep

private

time step

Definition at line 122 of file ForcingMovingBody.h.

Referenced by InitialiseCableModel(), and SetDynEqCoeffMatrix().

◆ m_vdim

int Nektar::ForcingMovingBody::m_vdim

private

vibration dimension

Definition at line 116 of file ForcingMovingBody.h.

Referenced by EvaluateStructDynModel(), InitialiseCableModel(), v_Apply(), and v_InitObject().

◆ m_zta

Array<OneD, Array<OneD, NekDouble> > Nektar::ForcingMovingBody::m_zta

private

Store the derivatives of motion variables in x-direction.

Definition at line 146 of file ForcingMovingBody.h.

Referenced by EvaluateStructDynModel(), v_Apply(), and v_InitObject().

Static Public Member Functions

Static Public Attributes

Protected Member Functions

Protected Attributes

Private Member Functions

Private Attributes

Friends

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ ForcingMovingBody()

Member Function Documentation

◆ CheckIsFromFile()

◆ create()

◆ EvaluateStructDynModel()

◆ InitialiseCableModel()

◆ InitialiseFilter()

◆ Newmark_betaSolver()

◆ RollOver()

◆ SetDynEqCoeffMatrix()

◆ v_Apply()

◆ v_InitObject()

Friends And Related Function Documentation

◆ MemoryManager< ForcingMovingBody >

Member Data Documentation

◆ className

◆ m_Aeroforces

◆ m_CoeffMat_A

◆ m_CoeffMat_B

◆ m_eta

◆ m_fA

◆ m_FFT

◆ m_funcName

◆ m_fV

◆ m_IsFromFile

◆ m_kinvis

◆ m_lhom

◆ m_mapping

◆ m_motion

◆ m_MotionVars

◆ m_MovBodyfilter

◆ m_movingBodyCalls

◆ m_np

◆ m_outputFile_fce

◆ m_outputFile_mot

◆ m_outputFrequency

◆ m_outputStream

◆ m_structdamp

◆ m_structrho

◆ m_timestep

◆ m_vdim

◆ m_zta