#include <SkewSymmetricAdvection.h>

Inheritance diagram for Nektar::SkewSymmetricAdvection:

Collaboration diagram for Nektar::SkewSymmetricAdvection:

Static Public Member Functions
static SolverUtils::AdvectionSharedPtr	create (std::string)
	Creates an instance of this class. More...

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

static std::string	className2

Protected Member Functions
	SkewSymmetricAdvection ()

virtual	~SkewSymmetricAdvection ()

virtual void	v_InitObject (LibUtilities::SessionReaderSharedPtr pSession, Array< OneD, MultiRegions::ExpListSharedPtr > pFields)
	Initialises the advection object. More...

virtual void	v_Advect (const int nConvectiveFields, const Array< OneD, MultiRegions::ExpListSharedPtr > &fields, const Array< OneD, Array< OneD, NekDouble > > &advVel, const Array< OneD, Array< OneD, NekDouble > > &inarray, Array< OneD, Array< OneD, NekDouble > > &outarray, const NekDouble &time, const Array< OneD, Array< OneD, NekDouble > > &pFwd=NullNekDoubleArrayofArray, const Array< OneD, Array< OneD, NekDouble > > &pBwd=NullNekDoubleArrayofArray)
	Advects a vector field. More...

Protected Member Functions inherited from Nektar::SolverUtils::Advection
virtual SOLVER_UTILS_EXPORT void	v_SetBaseFlow (const Array< OneD, Array< OneD, NekDouble > > &inarray, const Array< OneD, MultiRegions::ExpListSharedPtr > &fields)
	Overrides the base flow used during linearised advection. More...

Private Attributes
MultiRegions::CoeffState	m_CoeffState

bool	m_homogen_dealiasing

bool	m_SingleMode

bool	m_HalfMode

Friends
class	MemoryManager< SkewSymmetricAdvection >

Additional Inherited Members
Public Member Functions inherited from Nektar::SolverUtils::Advection
SOLVER_UTILS_EXPORT void	InitObject (LibUtilities::SessionReaderSharedPtr pSession, Array< OneD, MultiRegions::ExpListSharedPtr > pFields)
	Interface function to initialise the advection object. More...

SOLVER_UTILS_EXPORT void	Advect (const int nConvectiveFields, const Array< OneD, MultiRegions::ExpListSharedPtr > &fields, const Array< OneD, Array< OneD, NekDouble > > &advVel, const Array< OneD, Array< OneD, NekDouble > > &inarray, Array< OneD, Array< OneD, NekDouble > > &outarray, const NekDouble &time, const Array< OneD, Array< OneD, NekDouble > > &pFwd=NullNekDoubleArrayofArray, const Array< OneD, Array< OneD, NekDouble > > &pBwd=NullNekDoubleArrayofArray)
	Interface function to advect the vector field. More...

template<typename FuncPointerT , typename ObjectPointerT >
void	SetFluxVector (FuncPointerT func, ObjectPointerT obj)
	Set the flux vector callback function. More...

void	SetRiemannSolver (RiemannSolverSharedPtr riemann)
	Set a Riemann solver object for this advection object. More...

void	SetFluxVector (AdvectionFluxVecCB fluxVector)
	Set the flux vector callback function. More...

void	SetBaseFlow (const Array< OneD, Array< OneD, NekDouble > > &inarray, const Array< OneD, MultiRegions::ExpListSharedPtr > &fields)
	Set the base flow used for linearised advection objects. More...

Protected Attributes inherited from Nektar::SolverUtils::Advection
AdvectionFluxVecCB	m_fluxVector
	Callback function to the flux vector (set when advection is in conservative form). More...

RiemannSolverSharedPtr	m_riemann
	Riemann solver for DG-type schemes. More...

int	m_spaceDim
	Storage for space dimension. Used for homogeneous extension. More...

Detailed Description

Definition at line 45 of file SkewSymmetricAdvection.h.

Constructor & Destructor Documentation

Nektar::SkewSymmetricAdvection::SkewSymmetricAdvection ( )

protected

Definition at line 50 of file SkewSymmetricAdvection.cpp.

                                               :
     Advection()
 
 {
 }

Nektar::SkewSymmetricAdvection::~SkewSymmetricAdvection ( )

protectedvirtual

Definition at line 60 of file SkewSymmetricAdvection.cpp.

61 {

62 }

Member Function Documentation

static SolverUtils::AdvectionSharedPtr Nektar::SkewSymmetricAdvection::create ( std::string )

inlinestatic

Creates an instance of this class.

Definition at line 52 of file SkewSymmetricAdvection.h.

References Nektar::MemoryManager< DataType >::AllocateSharedPtr().

                                                            {
         return MemoryManager<SkewSymmetricAdvection>::AllocateSharedPtr();
     }

void Nektar::SkewSymmetricAdvection::v_Advect	(	const int	nConvectiveFields,
		const Array< OneD, MultiRegions::ExpListSharedPtr > &	fields,
		const Array< OneD, Array< OneD, NekDouble > > &	advVel,
		const Array< OneD, Array< OneD, NekDouble > > &	inarray,
		Array< OneD, Array< OneD, NekDouble > > &	outarray,
		const NekDouble &	time,
		const Array< OneD, Array< OneD, NekDouble > > &	pFwd = `NullNekDoubleArrayofArray`,
		const Array< OneD, Array< OneD, NekDouble > > &	pBwd = `NullNekDoubleArrayofArray`
	)

protectedvirtual

Advects a vector field.

Implements Nektar::SolverUtils::Advection.

Definition at line 84 of file SkewSymmetricAdvection.cpp.

References ASSERTL0, ASSERTL1, Nektar::MultiRegions::DirCartesianMap, m_CoeffState, m_HalfMode, m_homogen_dealiasing, m_SingleMode, Vmath::Neg(), Vmath::Smul(), Vmath::Vadd(), Vmath::Vmul(), and Vmath::Vvtvp().

 {
     // use dimension of Velocity vector to dictate dimension of operation
     int ndim             = advVel.num_elements();
     int nqtot            = fields[0]->GetTotPoints();
     ASSERTL1(nConvectiveFields == inarray.num_elements(),"Number of convective fields and Inarray are not compatible");
 
     Array<OneD, Array<OneD, NekDouble> > velocity(ndim);
     for(int i = 0; i < ndim; ++i)
     {
         if(fields[i]->GetWaveSpace() && !m_SingleMode && !m_HalfMode)
         {
             velocity[i] = Array<OneD, NekDouble>(nqtot,0.0);
             fields[i]->HomogeneousBwdTrans(advVel[i],velocity[i]);
         }
         else
         {
             velocity[i] = advVel[i];
         }
     }
 
     for(int n = 0; n < nConvectiveFields; ++n)
     {
         // ToDo: here we should add a check that V has right dimension
 
         int nPointsTot = fields[0]->GetNpoints();
         Array<OneD, NekDouble> gradV0,gradV1,gradV2, tmp, Up;
 
         gradV0   = Array<OneD, NekDouble> (nPointsTot);
         tmp = Array<OneD, NekDouble> (nPointsTot);
 
         // Evaluate V\cdot Grad(u)
         switch(ndim)
         {
         case 1:
             fields[0]->PhysDeriv(inarray[n],gradV0);
             Vmath::Vmul(nPointsTot,gradV0,1,velocity[0],1,outarray[n],1);
             Vmath::Vmul(nPointsTot,inarray[n],1,velocity[0],1,gradV0,1);
             fields[0]->PhysDeriv(gradV0,tmp);
             Vmath::Vadd(nPointsTot,tmp,1,outarray[n],1,outarray[n],1);
             Vmath::Smul(nPointsTot,0.5,outarray[n],1,outarray[n],1);
             break;
         case 2:
             gradV1 = Array<OneD, NekDouble> (nPointsTot);
             fields[0]->PhysDeriv(inarray[n],gradV0,gradV1);
             Vmath::Vmul (nPointsTot,gradV0,1,velocity[0],1,outarray[n],1);
             Vmath::Vvtvp(nPointsTot,gradV1,1,velocity[1],1,outarray[n],1,outarray[n],1);
             Vmath::Vmul(nPointsTot,inarray[n],1,velocity[0],1,gradV0,1);
             Vmath::Vmul(nPointsTot,inarray[n],1,velocity[1],1,gradV1,1);
             fields[0]->PhysDeriv(MultiRegions::DirCartesianMap[0],gradV0,tmp);
             Vmath::Vadd(nPointsTot,tmp,1,outarray[n],1,outarray[n],1);
             fields[0]->PhysDeriv(MultiRegions::DirCartesianMap[1],gradV1,tmp);
             Vmath::Vadd(nPointsTot,tmp,1,outarray[n],1,outarray[n],1);
             Vmath::Smul(nPointsTot,0.5,outarray[n],1,outarray[n],1);
             break;
         case 3:
             gradV1 = Array<OneD, NekDouble> (nPointsTot);
             gradV2 = Array<OneD, NekDouble> (nPointsTot);
 
             fields[0]->PhysDeriv(inarray[n],gradV0,gradV1,gradV2);
 
             //outarray[n] = 1/2(u*du/dx + v*du/dy + w*du/dz + duu/dx + duv/dy + duw/dz)
 
             if(m_homogen_dealiasing == true && fields[0]->GetWaveSpace() == false)
             {
                 fields[0]->DealiasedProd(velocity[0],gradV0,gradV0,m_CoeffState);
                 fields[0]->DealiasedProd(velocity[1],gradV1,gradV1,m_CoeffState);
                 fields[0]->DealiasedProd(velocity[2],gradV2,gradV2,m_CoeffState);
                 Vmath::Vadd(nPointsTot,gradV0,1,gradV1,1,outarray[n],1);
                 Vmath::Vadd(nPointsTot,gradV2,1,outarray[n],1,outarray[n],1);
                 fields[0]->DealiasedProd(inarray[n],velocity[0],gradV0,m_CoeffState);
                 fields[0]->DealiasedProd(inarray[n],velocity[1],gradV1,m_CoeffState);
                 fields[0]->DealiasedProd(inarray[n],velocity[2],gradV2,m_CoeffState);
                 fields[0]->PhysDeriv(MultiRegions::DirCartesianMap[0],gradV0,tmp);
                 Vmath::Vadd(nPointsTot,tmp,1,outarray[n],1,outarray[n],1);
                 fields[0]->PhysDeriv(MultiRegions::DirCartesianMap[1],gradV1,tmp);
                 Vmath::Vadd(nPointsTot,tmp,1,outarray[n],1,outarray[n],1);
                 fields[0]->PhysDeriv(MultiRegions::DirCartesianMap[2],gradV2,tmp);
                 Vmath::Vadd(nPointsTot,tmp,1,outarray[n],1,outarray[n],1);
                 Vmath::Smul(nPointsTot,0.5,outarray[n],1,outarray[n],1);
             }
             else if(fields[0]->GetWaveSpace() == true && m_homogen_dealiasing == false)
             {
                 Up = Array<OneD, NekDouble> (nPointsTot);
                 //vector reused to avoid even more memory requirements
                 //names may be misleading
                 fields[0]->HomogeneousBwdTrans(gradV0,tmp);
                 Vmath::Vmul(nPointsTot,tmp,1,velocity[0],1,outarray[n],1); // + u*du/dx
                 fields[0]->HomogeneousBwdTrans(gradV1,tmp);
                 Vmath::Vvtvp(nPointsTot,tmp,1,velocity[1],1,outarray[n],1,outarray[n],1);// + v*du/dy
                 fields[0]->HomogeneousBwdTrans(gradV2,tmp);
                 Vmath::Vvtvp(nPointsTot,tmp,1,velocity[2],1,outarray[n],1,outarray[n],1);// + w*du/dz
 
                 fields[0]->HomogeneousBwdTrans(inarray[n],Up);
                 Vmath::Vmul(nPointsTot,Up,1,velocity[0],1,gradV0,1);
                 Vmath::Vmul(nPointsTot,Up,1,velocity[1],1,gradV1,1);
                 Vmath::Vmul(nPointsTot,Up,1,velocity[2],1,gradV2,1);
 
                 fields[0]->SetWaveSpace(false);
                 fields[0]->PhysDeriv(MultiRegions::DirCartesianMap[0],gradV0,tmp);//duu/dx
                 Vmath::Vadd(nPointsTot,tmp,1,outarray[n],1,outarray[n],1);
                 fields[0]->PhysDeriv(MultiRegions::DirCartesianMap[1],gradV1,tmp);//duv/dy
                 Vmath::Vadd(nPointsTot,tmp,1,outarray[n],1,outarray[n],1);
                 fields[0]->PhysDeriv(MultiRegions::DirCartesianMap[2],gradV2,tmp);//duw/dz
                 Vmath::Vadd(nPointsTot,tmp,1,outarray[n],1,outarray[n],1);
                 fields[0]->SetWaveSpace(true);
 
                 Vmath::Smul(nPointsTot,0.5,outarray[n],1,tmp,1);
                 fields[0]->HomogeneousFwdTrans(tmp,outarray[n]);
             }
             else if(fields[0]->GetWaveSpace() == false && m_homogen_dealiasing == false)
             {
                 Vmath::Vmul(nPointsTot,gradV0,1,velocity[0],1,outarray[n],1);
                 Vmath::Vvtvp(nPointsTot,gradV1,1,velocity[1],1,outarray[n],1,outarray[n],1);
                 Vmath::Vvtvp(nPointsTot,gradV2,1,velocity[2],1,outarray[n],1,outarray[n],1);
                 Vmath::Vmul(nPointsTot,inarray[n],1,velocity[0],1,gradV0,1);
                 Vmath::Vmul(nPointsTot,inarray[n],1,velocity[1],1,gradV1,1);
                 Vmath::Vmul(nPointsTot,inarray[n],1,velocity[2],1,gradV2,1);
                 fields[0]->PhysDeriv(MultiRegions::DirCartesianMap[0],gradV0,tmp);
                 Vmath::Vadd(nPointsTot,tmp,1,outarray[n],1,outarray[n],1);
                 fields[0]->PhysDeriv(MultiRegions::DirCartesianMap[1],gradV1,tmp);
                 Vmath::Vadd(nPointsTot,tmp,1,outarray[n],1,outarray[n],1);
                 fields[0]->PhysDeriv(MultiRegions::DirCartesianMap[2],gradV2,tmp);
                 Vmath::Vadd(nPointsTot,tmp,1,outarray[n],1,outarray[n],1);
                 Vmath::Smul(nPointsTot,0.5,outarray[n],1,outarray[n],1);
             }
             else
             {
                 ASSERTL0(false, "Dealiasing is not allowed in combination "
                                 "with the Skew-Symmetric advection form for "
                                 "efficiency reasons.");
             }
             break;
         default:
             ASSERTL0(false,"dimension unknown");
         }
 
         Vmath::Neg(nqtot,outarray[n],1);
     }
 
 }

void Nektar::SkewSymmetricAdvection::v_InitObject	(	LibUtilities::SessionReaderSharedPtr	pSession,
		Array< OneD, MultiRegions::ExpListSharedPtr >	pFields
	)

protectedvirtual

Initialises the advection object.

This function should be overridden in derived classes to initialise the specific advection data members. However, this base class function should be called as the first statement of the overridden function to ensure the base class is correctly initialised in order.

Parameters

pSession	Session information.
pFields	Expansion lists for scalar fields.

Reimplemented from Nektar::SolverUtils::Advection.

Definition at line 68 of file SkewSymmetricAdvection.cpp.

References Nektar::MultiRegions::eLocal, m_CoeffState, m_HalfMode, m_homogen_dealiasing, m_SingleMode, and Nektar::SolverUtils::Advection::v_InitObject().

 {
     Advection::v_InitObject(pSession, pFields);
 
     m_CoeffState = MultiRegions::eLocal;
     m_homogen_dealiasing = pSession->DefinesSolverInfo("dealiasing");
     pSession->MatchSolverInfo("ModeType","SingleMode",m_SingleMode,false);
     pSession->MatchSolverInfo("ModeType","HalfMode",m_HalfMode,false);
 }

Friends And Related Function Documentation

friend class MemoryManager< SkewSymmetricAdvection >

friend

Definition at line 49 of file SkewSymmetricAdvection.h.

Member Data Documentation

string Nektar::SkewSymmetricAdvection::className

static

Initial value:

= SolverUtils::GetAdvectionFactory().RegisterCreatorFunction(
            "SkewSymmetric",
            SkewSymmetricAdvection::create)

Name of class.

Definition at line 57 of file SkewSymmetricAdvection.h.

std::string Nektar::SkewSymmetricAdvection::className2

static

Definition at line 58 of file SkewSymmetricAdvection.h.

MultiRegions::CoeffState Nektar::SkewSymmetricAdvection::m_CoeffState

private

Definition at line 81 of file SkewSymmetricAdvection.h.

Referenced by v_Advect(), and v_InitObject().

bool Nektar::SkewSymmetricAdvection::m_HalfMode

private

Definition at line 84 of file SkewSymmetricAdvection.h.

Referenced by v_Advect(), and v_InitObject().

bool Nektar::SkewSymmetricAdvection::m_homogen_dealiasing

private

Definition at line 82 of file SkewSymmetricAdvection.h.

Referenced by v_Advect(), and v_InitObject().

bool Nektar::SkewSymmetricAdvection::m_SingleMode

private

Definition at line 83 of file SkewSymmetricAdvection.h.

Referenced by v_Advect(), and v_InitObject().

Static Public Member Functions

Static Public Attributes

Protected Member Functions

Private Attributes

Friends

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation