#include <UnsteadyDiffusion.h>

Inheritance diagram for Nektar::UnsteadyDiffusion:

Public Member Functions
virtual	~UnsteadyDiffusion ()
	Destructor. More...

Public Member Functions inherited from Nektar::SolverUtils::UnsteadySystem
virtual SOLVER_UTILS_EXPORT	~UnsteadySystem ()
	Destructor. More...

SOLVER_UTILS_EXPORT NekDouble	GetTimeStep (const Array< OneD, const Array< OneD, NekDouble >> &inarray)
	Calculate the larger time-step mantaining the problem stable. More...

Public Member Functions inherited from Nektar::SolverUtils::EquationSystem
virtual SOLVER_UTILS_EXPORT	~EquationSystem ()
	Destructor. More...

SOLVER_UTILS_EXPORT void	SetUpTraceNormals (void)

SOLVER_UTILS_EXPORT void	InitObject ()
	Initialises the members of this object. More...

SOLVER_UTILS_EXPORT void	DoInitialise ()
	Perform any initialisation necessary before solving the problem. More...

SOLVER_UTILS_EXPORT void	DoSolve ()
	Solve the problem. More...

SOLVER_UTILS_EXPORT void	TransCoeffToPhys ()
	Transform from coefficient to physical space. More...

SOLVER_UTILS_EXPORT void	TransPhysToCoeff ()
	Transform from physical to coefficient space. More...

SOLVER_UTILS_EXPORT void	Output ()
	Perform output operations after solve. More...

SOLVER_UTILS_EXPORT NekDouble	LinfError (unsigned int field, const Array< OneD, NekDouble > &exactsoln=NullNekDouble1DArray)
	Linf error computation. More...

SOLVER_UTILS_EXPORT std::string	GetSessionName ()
	Get Session name. More...

template<class T >
std::shared_ptr< T >	as ()

SOLVER_UTILS_EXPORT void	ResetSessionName (std::string newname)
	Reset Session name. More...

SOLVER_UTILS_EXPORT LibUtilities::SessionReaderSharedPtr	GetSession ()
	Get Session name. More...

SOLVER_UTILS_EXPORT MultiRegions::ExpListSharedPtr	GetPressure ()
	Get pressure field if available. More...

SOLVER_UTILS_EXPORT void	ExtraFldOutput (std::vector< Array< OneD, NekDouble > > &fieldcoeffs, std::vector< std::string > &variables)

SOLVER_UTILS_EXPORT void	PrintSummary (std::ostream &out)
	Print a summary of parameters and solver characteristics. More...

SOLVER_UTILS_EXPORT void	SetLambda (NekDouble lambda)
	Set parameter m_lambda. More...

SOLVER_UTILS_EXPORT SessionFunctionSharedPtr	GetFunction (std::string name, const MultiRegions::ExpListSharedPtr &field=MultiRegions::NullExpListSharedPtr, bool cache=false)
	Get a SessionFunction by name. More...

SOLVER_UTILS_EXPORT void	SetInitialConditions (NekDouble initialtime=0.0, bool dumpInitialConditions=true, const int domain=0)
	Initialise the data in the dependent fields. More...

SOLVER_UTILS_EXPORT void	EvaluateExactSolution (int field, Array< OneD, NekDouble > &outfield, const NekDouble time)
	Evaluates an exact solution. More...

SOLVER_UTILS_EXPORT NekDouble	L2Error (unsigned int field, const Array< OneD, NekDouble > &exactsoln, bool Normalised=false)
	Compute the L2 error between fields and a given exact solution. More...

SOLVER_UTILS_EXPORT NekDouble	L2Error (unsigned int field, bool Normalised=false)
	Compute the L2 error of the fields. More...

SOLVER_UTILS_EXPORT Array< OneD, NekDouble >	ErrorExtraPoints (unsigned int field)
	Compute error (L2 and L_inf) over an larger set of quadrature points return [L2 Linf]. More...

SOLVER_UTILS_EXPORT void	Checkpoint_Output (const int n)
	Write checkpoint file of m_fields. More...

SOLVER_UTILS_EXPORT void	Checkpoint_Output (const int n, MultiRegions::ExpListSharedPtr &field, std::vector< Array< OneD, NekDouble > > &fieldcoeffs, std::vector< std::string > &variables)
	Write checkpoint file of custom data fields. More...

SOLVER_UTILS_EXPORT void	Checkpoint_BaseFlow (const int n)
	Write base flow file of m_fields. More...

SOLVER_UTILS_EXPORT void	WriteFld (const std::string &outname)
	Write field data to the given filename. More...

SOLVER_UTILS_EXPORT void	WriteFld (const std::string &outname, MultiRegions::ExpListSharedPtr &field, std::vector< Array< OneD, NekDouble > > &fieldcoeffs, std::vector< std::string > &variables)
	Write input fields to the given filename. More...

SOLVER_UTILS_EXPORT void	ImportFld (const std::string &infile, Array< OneD, MultiRegions::ExpListSharedPtr > &pFields)
	Input field data from the given file. More...

SOLVER_UTILS_EXPORT void	ImportFldToMultiDomains (const std::string &infile, Array< OneD, MultiRegions::ExpListSharedPtr > &pFields, const int ndomains)
	Input field data from the given file to multiple domains. More...

SOLVER_UTILS_EXPORT void	ImportFld (const std::string &infile, std::vector< std::string > &fieldStr, Array< OneD, Array< OneD, NekDouble > > &coeffs)
	Output a field. Input field data into array from the given file. More...

SOLVER_UTILS_EXPORT void	ImportFld (const std::string &infile, MultiRegions::ExpListSharedPtr &pField, std::string &pFieldName)
	Output a field. Input field data into ExpList from the given file. More...

SOLVER_UTILS_EXPORT void	SessionSummary (SummaryList &vSummary)
	Write out a session summary. More...

SOLVER_UTILS_EXPORT Array< OneD, MultiRegions::ExpListSharedPtr > &	UpdateFields ()

SOLVER_UTILS_EXPORT LibUtilities::FieldMetaDataMap &	UpdateFieldMetaDataMap ()
	Get hold of FieldInfoMap so it can be updated. More...

SOLVER_UTILS_EXPORT NekDouble	GetFinalTime ()
	Return final time. More...

SOLVER_UTILS_EXPORT int	GetNcoeffs ()

SOLVER_UTILS_EXPORT int	GetNcoeffs (const int eid)

SOLVER_UTILS_EXPORT int	GetNumExpModes ()

SOLVER_UTILS_EXPORT const Array< OneD, int >	GetNumExpModesPerExp ()

SOLVER_UTILS_EXPORT int	GetNvariables ()

SOLVER_UTILS_EXPORT const std::string	GetVariable (unsigned int i)

SOLVER_UTILS_EXPORT int	GetTraceTotPoints ()

SOLVER_UTILS_EXPORT int	GetTraceNpoints ()

SOLVER_UTILS_EXPORT int	GetExpSize ()

SOLVER_UTILS_EXPORT int	GetPhys_Offset (int n)

SOLVER_UTILS_EXPORT int	GetCoeff_Offset (int n)

SOLVER_UTILS_EXPORT int	GetTotPoints ()

SOLVER_UTILS_EXPORT int	GetTotPoints (int n)

SOLVER_UTILS_EXPORT int	GetNpoints ()

SOLVER_UTILS_EXPORT int	GetSteps ()

SOLVER_UTILS_EXPORT NekDouble	GetTimeStep ()

SOLVER_UTILS_EXPORT void	CopyFromPhysField (const int i, Array< OneD, NekDouble > &output)

SOLVER_UTILS_EXPORT void	CopyToPhysField (const int i, Array< OneD, NekDouble > &output)

SOLVER_UTILS_EXPORT void	SetSteps (const int steps)

SOLVER_UTILS_EXPORT void	ZeroPhysFields ()

SOLVER_UTILS_EXPORT void	FwdTransFields ()

SOLVER_UTILS_EXPORT void	SetModifiedBasis (const bool modbasis)

SOLVER_UTILS_EXPORT int	GetCheckpointNumber ()

SOLVER_UTILS_EXPORT void	SetCheckpointNumber (int num)

SOLVER_UTILS_EXPORT int	GetCheckpointSteps ()

SOLVER_UTILS_EXPORT void	SetCheckpointSteps (int num)

SOLVER_UTILS_EXPORT void	SetTime (const NekDouble time)

SOLVER_UTILS_EXPORT void	SetInitialStep (const int step)

SOLVER_UTILS_EXPORT void	SetBoundaryConditions (NekDouble time)
	Evaluates the boundary conditions at the given time. More...

virtual SOLVER_UTILS_EXPORT bool	v_NegatedOp ()
	Virtual function to identify if operator is negated in DoSolve. More...

Static Public Member Functions
static EquationSystemSharedPtr	create (const LibUtilities::SessionReaderSharedPtr &pSession, const SpatialDomains::MeshGraphSharedPtr &pGraph)
	Creates an instance of this class. More...

Static Public Attributes
static std::string	className = GetEquationSystemFactory().RegisterCreatorFunction("UnsteadyDiffusion", UnsteadyDiffusion::create)
	Name of class. More...

Protected Member Functions
virtual void	v_GenerateSummary (SummaryList &s)
	Print a summary of time stepping parameters. More...

	UnsteadyDiffusion (const LibUtilities::SessionReaderSharedPtr &pSession, const SpatialDomains::MeshGraphSharedPtr &pGraph)

virtual void	v_InitObject ()
	Initialisation object for the unsteady diffusion problem. More...

void	GetFluxVector (const Array< OneD, Array< OneD, NekDouble > > &inarray, const Array< OneD, Array< OneD, Array< OneD, NekDouble > > > &qfield, Array< OneD, Array< OneD, Array< OneD, NekDouble > > > &viscousTensor)
	Return the flux vector for the unsteady diffusion problem. More...

void	DoOdeRhs (const Array< OneD, const Array< OneD, NekDouble > > &inarray, Array< OneD, Array< OneD, NekDouble > > &outarray, const NekDouble time)

void	DoOdeProjection (const Array< OneD, const Array< OneD, NekDouble > > &inarray, Array< OneD, Array< OneD, NekDouble > > &outarray, const NekDouble time)
	Compute the projection for the unsteady diffusion problem. More...

virtual void	DoImplicitSolve (const Array< OneD, const Array< OneD, NekDouble > > &inarray, Array< OneD, Array< OneD, NekDouble > > &outarray, NekDouble time, NekDouble lambda)
	Implicit solution of the unsteady diffusion problem. More...

Protected Member Functions inherited from Nektar::SolverUtils::UnsteadySystem
SOLVER_UTILS_EXPORT	UnsteadySystem (const LibUtilities::SessionReaderSharedPtr &pSession, const SpatialDomains::MeshGraphSharedPtr &pGraph)
	Initialises UnsteadySystem class members. More...

SOLVER_UTILS_EXPORT NekDouble	MaxTimeStepEstimator ()
	Get the maximum timestep estimator for cfl control. More...

virtual SOLVER_UTILS_EXPORT void	v_DoSolve ()
	Solves an unsteady problem. More...

virtual SOLVER_UTILS_EXPORT void	v_DoInitialise ()
	Sets up initial conditions. More...

virtual SOLVER_UTILS_EXPORT void	v_AppendOutput1D (Array< OneD, Array< OneD, NekDouble >> &solution1D)
	Print the solution at each solution point in a txt file. More...

virtual SOLVER_UTILS_EXPORT NekDouble	v_GetTimeStep (const Array< OneD, const Array< OneD, NekDouble >> &inarray)
	Return the timestep to be used for the next step in the time-marching loop. More...

virtual SOLVER_UTILS_EXPORT bool	v_PreIntegrate (int step)

virtual SOLVER_UTILS_EXPORT bool	v_PostIntegrate (int step)

virtual SOLVER_UTILS_EXPORT bool	v_RequireFwdTrans ()

SOLVER_UTILS_EXPORT void	CheckForRestartTime (NekDouble &time, int &nchk)

SOLVER_UTILS_EXPORT void	SVVVarDiffCoeff (const Array< OneD, Array< OneD, NekDouble >> vel, StdRegions::VarCoeffMap &varCoeffMap)
	Evaluate the SVV diffusion coefficient according to Moura's paper where it should proportional to h time velocity. More...

Protected Member Functions inherited from Nektar::SolverUtils::EquationSystem
SOLVER_UTILS_EXPORT	EquationSystem (const LibUtilities::SessionReaderSharedPtr &pSession, const SpatialDomains::MeshGraphSharedPtr &pGraph)
	Initialises EquationSystem class members. More...

virtual SOLVER_UTILS_EXPORT NekDouble	v_LinfError (unsigned int field, const Array< OneD, NekDouble > &exactsoln=NullNekDouble1DArray)
	Virtual function for the L_inf error computation between fields and a given exact solution. More...

virtual SOLVER_UTILS_EXPORT NekDouble	v_L2Error (unsigned int field, const Array< OneD, NekDouble > &exactsoln=NullNekDouble1DArray, bool Normalised=false)
	Virtual function for the L_2 error computation between fields and a given exact solution. More...

virtual SOLVER_UTILS_EXPORT void	v_TransCoeffToPhys ()
	Virtual function for transformation to physical space. More...

virtual SOLVER_UTILS_EXPORT void	v_TransPhysToCoeff ()
	Virtual function for transformation to coefficient space. More...

virtual SOLVER_UTILS_EXPORT void	v_SetInitialConditions (NekDouble initialtime=0.0, bool dumpInitialConditions=true, const int domain=0)

virtual SOLVER_UTILS_EXPORT void	v_EvaluateExactSolution (unsigned int field, Array< OneD, NekDouble > &outfield, const NekDouble time)

virtual SOLVER_UTILS_EXPORT void	v_Output (void)

virtual SOLVER_UTILS_EXPORT MultiRegions::ExpListSharedPtr	v_GetPressure (void)

virtual SOLVER_UTILS_EXPORT void	v_ExtraFldOutput (std::vector< Array< OneD, NekDouble > > &fieldcoeffs, std::vector< std::string > &variables)

Protected Attributes
bool	m_useSpecVanVisc

NekDouble	m_sVVCutoffRatio

NekDouble	m_sVVDiffCoeff

SolverUtils::DiffusionSharedPtr	m_diffusion

SolverUtils::RiemannSolverSharedPtr	m_riemannSolver

Protected Attributes inherited from Nektar::SolverUtils::UnsteadySystem
int	m_infosteps
	Number of time steps between outputting status information. More...

int	m_abortSteps
	Number of steps between checks for abort conditions. More...

int	m_filtersInfosteps
	Number of time steps between outputting filters information. More...

int	m_nanSteps

LibUtilities::TimeIntegrationWrapperSharedPtr	m_intScheme
	Wrapper to the time integration scheme. More...

LibUtilities::TimeIntegrationSchemeOperators	m_ode
	The time integration scheme operators to use. More...

LibUtilities::TimeIntegrationSolutionSharedPtr	m_intSoln

NekDouble	m_epsilon

bool	m_explicitDiffusion
	Indicates if explicit or implicit treatment of diffusion is used. More...

bool	m_explicitAdvection
	Indicates if explicit or implicit treatment of advection is used. More...

bool	m_explicitReaction
	Indicates if explicit or implicit treatment of reaction is used. More...

bool	m_homoInitialFwd
	Flag to determine if simulation should start in homogeneous forward transformed state. More...

NekDouble	m_steadyStateTol
	Tolerance to which steady state should be evaluated at. More...

int	m_steadyStateSteps
	Check for steady state at step interval. More...

Array< OneD, Array< OneD, NekDouble > >	m_previousSolution
	Storage for previous solution for steady-state check. More...

std::ofstream	m_errFile

std::vector< int >	m_intVariables

std::vector< std::pair< std::string, FilterSharedPtr > >	m_filters

NekDouble	m_filterTimeWarning
	Number of time steps between outputting status information. More...

Protected Attributes inherited from Nektar::SolverUtils::EquationSystem
LibUtilities::CommSharedPtr	m_comm
	Communicator. More...

LibUtilities::SessionReaderSharedPtr	m_session
	The session reader. More...

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

LibUtilities::FieldIOSharedPtr	m_fld
	Field input/output. More...

Array< OneD, MultiRegions::ExpListSharedPtr >	m_fields
	Array holding all dependent variables. More...

SpatialDomains::BoundaryConditionsSharedPtr	m_boundaryConditions
	Pointer to boundary conditions object. More...

SpatialDomains::MeshGraphSharedPtr	m_graph
	Pointer to graph defining mesh. More...

std::string	m_sessionName
	Name of the session. More...

NekDouble	m_time
	Current time of simulation. More...

int	m_initialStep
	Number of the step where the simulation should begin. More...

NekDouble	m_fintime
	Finish time of the simulation. More...

NekDouble	m_timestep
	Time step size. More...

NekDouble	m_lambda
	Lambda constant in real system if one required. More...

NekDouble	m_checktime
	Time between checkpoints. More...

int	m_nchk
	Number of checkpoints written so far. More...

int	m_steps
	Number of steps to take. More...

int	m_checksteps
	Number of steps between checkpoints. More...

int	m_spacedim
	Spatial dimension (>= expansion dim). More...

int	m_expdim
	Expansion dimension. More...

bool	m_singleMode
	Flag to determine if single homogeneous mode is used. More...

bool	m_halfMode
	Flag to determine if half homogeneous mode is used. More...

bool	m_multipleModes
	Flag to determine if use multiple homogenenous modes are used. More...

bool	m_useFFT
	Flag to determine if FFT is used for homogeneous transform. More...

bool	m_homogen_dealiasing
	Flag to determine if dealiasing is used for homogeneous simulations. More...

bool	m_specHP_dealiasing
	Flag to determine if dealisising is usde for the Spectral/hp element discretisation. More...

enum MultiRegions::ProjectionType	m_projectionType
	Type of projection; e.g continuous or discontinuous. More...

Array< OneD, Array< OneD, NekDouble > >	m_traceNormals
	Array holding trace normals for DG simulations in the forwards direction. More...

Array< OneD, bool >	m_checkIfSystemSingular
	Flag to indicate if the fields should be checked for singularity. More...

LibUtilities::FieldMetaDataMap	m_fieldMetaDataMap
	Map to identify relevant solver info to dump in output fields. More...

int	m_NumQuadPointsError
	Number of Quadrature points used to work out the error. More...

enum HomogeneousType	m_HomogeneousType

NekDouble	m_LhomX
	physical length in X direction (if homogeneous) More...

NekDouble	m_LhomY
	physical length in Y direction (if homogeneous) More...

NekDouble	m_LhomZ
	physical length in Z direction (if homogeneous) More...

int	m_npointsX
	number of points in X direction (if homogeneous) More...

int	m_npointsY
	number of points in Y direction (if homogeneous) More...

int	m_npointsZ
	number of points in Z direction (if homogeneous) More...

int	m_HomoDirec
	number of homogenous directions More...

Private Attributes
NekDouble	m_waveFreq

NekDouble	m_epsilon

StdRegions::VarCoeffMap	m_varcoeff

Friends
class	MemoryManager< UnsteadyDiffusion >

Additional Inherited Members
Public Attributes inherited from Nektar::SolverUtils::UnsteadySystem
NekDouble	m_cflSafetyFactor
	CFL safety factor (comprise between 0 to 1). More...

Protected Types inherited from Nektar::SolverUtils::EquationSystem
enum	HomogeneousType { eHomogeneous1D, eHomogeneous2D, eHomogeneous3D, eNotHomogeneous }
	Parameter for homogeneous expansions. More...

Static Protected Attributes inherited from Nektar::SolverUtils::EquationSystem
static std::string	equationSystemTypeLookupIds []

Detailed Description

Definition at line 45 of file UnsteadyDiffusion.h.

Constructor & Destructor Documentation

◆ ~UnsteadyDiffusion()

Nektar::UnsteadyDiffusion::~UnsteadyDiffusion ( )

virtual

Destructor.

Unsteady diffusion problem destructor.

Definition at line 137 of file UnsteadyDiffusion.cpp.

138 {

139 }

◆ UnsteadyDiffusion()

Nektar::UnsteadyDiffusion::UnsteadyDiffusion	(	const LibUtilities::SessionReaderSharedPtr &	pSession,
		const SpatialDomains::MeshGraphSharedPtr &	pGraph
	)

protected

Definition at line 47 of file UnsteadyDiffusion.cpp.

         : UnsteadySystem(pSession, pGraph)
     {
     }

Member Function Documentation

◆ create()

static EquationSystemSharedPtr Nektar::UnsteadyDiffusion::create	(	const LibUtilities::SessionReaderSharedPtr &	pSession,
		const SpatialDomains::MeshGraphSharedPtr &	pGraph
	)

inlinestatic

Creates an instance of this class.

Definition at line 51 of file UnsteadyDiffusion.h.

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

         {
             EquationSystemSharedPtr p = MemoryManager<UnsteadyDiffusion>
                 ::AllocateSharedPtr(pSession, pGraph);
             p->InitObject();
             return p;
         }

◆ DoImplicitSolve()

void Nektar::UnsteadyDiffusion::DoImplicitSolve	(	const Array< OneD, const Array< OneD, NekDouble > > &	inarray,
		Array< OneD, Array< OneD, NekDouble > > &	outarray,
		NekDouble	time,
		NekDouble	lambda
	)

protectedvirtual

Implicit solution of the unsteady diffusion problem.

Definition at line 229 of file UnsteadyDiffusion.cpp.

References Nektar::StdRegions::eFactorLambda, Nektar::StdRegions::eFactorSVVCutoffRatio, Nektar::StdRegions::eFactorSVVDiffCoeff, Nektar::StdRegions::eFactorTau, m_epsilon, Nektar::SolverUtils::EquationSystem::m_fields, m_sVVCutoffRatio, m_sVVDiffCoeff, m_useSpecVanVisc, m_varcoeff, Nektar::NullFlagList, and Vmath::Smul().

Referenced by v_InitObject().

     {
         boost::ignore_unused(time);
 
         StdRegions::ConstFactorMap factors;
 
         int nvariables = inarray.num_elements();
         int npoints    = m_fields[0]->GetNpoints();
         factors[StdRegions::eFactorLambda] = 1.0 / lambda / m_epsilon;
         factors[StdRegions::eFactorTau]    = 1.0;
 
         if(m_useSpecVanVisc)
         {
             factors[StdRegions::eFactorSVVCutoffRatio] = m_sVVCutoffRatio;
             factors[StdRegions::eFactorSVVDiffCoeff]   = m_sVVDiffCoeff/m_epsilon;
         }
 
         // We solve ( \nabla^2 - HHlambda ) Y[i] = rhs [i]
         // inarray = input: \hat{rhs} -> output: \hat{Y}
         // outarray = output: nabla^2 \hat{Y}
         // where \hat = modal coeffs
         for (int i = 0; i < nvariables; ++i)
         {
             // Multiply 1.0/timestep/lambda
             Vmath::Smul(npoints,
                         -factors[StdRegions::eFactorLambda],
                         inarray[i], 1,
                         outarray[i], 1);
 
             // Solve a system of equations with Helmholtz solver
             m_fields[i]->HelmSolve(outarray[i],
                                    m_fields[i]->UpdateCoeffs(),
                                    NullFlagList,
                                    factors,
                                    m_varcoeff);
 
             m_fields[i]->BwdTrans(m_fields[i]->GetCoeffs(),
                                   outarray[i]);
 
             m_fields[i]->SetPhysState(false);
         }
     }

◆ DoOdeProjection()

void Nektar::UnsteadyDiffusion::DoOdeProjection	(	const Array< OneD, const Array< OneD, NekDouble > > &	inarray,
		Array< OneD, Array< OneD, NekDouble > > &	outarray,
		const NekDouble	time
	)

protected

Compute the projection for the unsteady diffusion problem.

Parameters

inarray	Given fields.
outarray	Calculated solution.
time	Time.

Definition at line 184 of file UnsteadyDiffusion.cpp.

References ASSERTL0, Nektar::MultiRegions::eDiscontinuous, Nektar::MultiRegions::eGalerkin, Nektar::MultiRegions::eMixed_CG_Discontinuous, Nektar::SolverUtils::EquationSystem::GetNcoeffs(), Nektar::SolverUtils::EquationSystem::GetNpoints(), Nektar::SolverUtils::EquationSystem::m_fields, Nektar::SolverUtils::EquationSystem::m_projectionType, Nektar::SolverUtils::EquationSystem::SetBoundaryConditions(), and Vmath::Vcopy().

Referenced by v_InitObject().

     {
         int i;
         int nvariables = inarray.num_elements();
         SetBoundaryConditions(time);
 
         switch(m_projectionType)
         {
             case MultiRegions::eDiscontinuous:
             {
                 // Just copy over array
                 int npoints = GetNpoints();
 
                 for(i = 0; i < nvariables; ++i)
                 {
                     Vmath::Vcopy(npoints, inarray[i], 1, outarray[i], 1);
                 }
                 break;
             }
             case MultiRegions::eGalerkin:
             case MultiRegions::eMixed_CG_Discontinuous:
             {
                 Array<OneD, NekDouble> coeffs(m_fields[0]->GetNcoeffs());
 
                 for(i = 0; i < nvariables; ++i)
                 {
                     m_fields[i]->FwdTrans(inarray[i], coeffs);
                     m_fields[i]->BwdTrans_IterPerExp(coeffs, outarray[i]);
                 }
                 break;
             }
             default:
             {
                 ASSERTL0(false, "Unknown projection scheme");
                 break;
             }
         }
     }

◆ DoOdeRhs()

void Nektar::UnsteadyDiffusion::DoOdeRhs	(	const Array< OneD, const Array< OneD, NekDouble > > &	inarray,
		Array< OneD, Array< OneD, NekDouble > > &	outarray,
		const NekDouble	time
	)

protected

Definition at line 160 of file UnsteadyDiffusion.cpp.

References m_diffusion, and Nektar::SolverUtils::EquationSystem::m_fields.

Referenced by v_InitObject().

     {
         boost::ignore_unused(time);
 
         // Number of fields (variables of the problem)
         int nVariables = inarray.num_elements();
 
         // RHS computation using the new advection base class
         m_diffusion->Diffuse(nVariables,
                              m_fields,
                              inarray,
                              outarray);
     }

◆ GetFluxVector()

void Nektar::UnsteadyDiffusion::GetFluxVector	(	const Array< OneD, Array< OneD, NekDouble > > &	inarray,
		const Array< OneD, Array< OneD, Array< OneD, NekDouble > > > &	qfield,
		Array< OneD, Array< OneD, Array< OneD, NekDouble > > > &	viscousTensor
	)

protected

Return the flux vector for the unsteady diffusion problem.

Definition at line 279 of file UnsteadyDiffusion.cpp.

References m_epsilon, and Vmath::Smul().

Referenced by v_InitObject().

     {
         boost::ignore_unused(inarray);
 
         unsigned int nDim = qfield.num_elements();
         unsigned int nConvectiveFields = qfield[0].num_elements();
         unsigned int nPts = qfield[0][0].num_elements();
 
         for (unsigned int j = 0; j < nDim; ++j)
         {
             for (unsigned int i = 0; i < nConvectiveFields; ++i)
             {
                 Vmath::Smul(nPts, m_epsilon, qfield[j][i], 1,
                     viscousTensor[j][i], 1 );
             }
         }
     }

◆ v_GenerateSummary()

void Nektar::UnsteadyDiffusion::v_GenerateSummary ( SummaryList & s )

protectedvirtual

Print a summary of time stepping parameters.

Prints a summary with some information regards the time-stepping.

Reimplemented from Nektar::SolverUtils::UnsteadySystem.

Definition at line 141 of file UnsteadyDiffusion.cpp.

References Nektar::SolverUtils::AddSummaryItem(), m_sVVCutoffRatio, m_sVVDiffCoeff, m_useSpecVanVisc, and Nektar::SolverUtils::UnsteadySystem::v_GenerateSummary().

     {
         UnsteadySystem::v_GenerateSummary(s);
         if(m_useSpecVanVisc)
         {
             stringstream ss;
             ss << "SVV (cut off = " << m_sVVCutoffRatio
                << ", coeff = "      << m_sVVDiffCoeff << ")";
             AddSummaryItem(s, "Smoothing", ss.str());
         }
     }

◆ v_InitObject()

void Nektar::UnsteadyDiffusion::v_InitObject ( )

protectedvirtual

Initialisation object for the unsteady diffusion problem.

Reimplemented from Nektar::SolverUtils::UnsteadySystem.

Definition at line 57 of file UnsteadyDiffusion.cpp.

References ASSERTL0, Nektar::LibUtilities::TimeIntegrationSchemeOperators::DefineImplicitSolve(), Nektar::LibUtilities::TimeIntegrationSchemeOperators::DefineOdeRhs(), Nektar::LibUtilities::TimeIntegrationSchemeOperators::DefineProjection(), DoImplicitSolve(), DoOdeProjection(), DoOdeRhs(), Nektar::MultiRegions::eDiscontinuous, Nektar::MultiRegions::eGalerkin, Nektar::MultiRegions::eMixed_CG_Discontinuous, Nektar::StdRegions::eVarCoeffD00, Nektar::StdRegions::eVarCoeffD11, Nektar::StdRegions::eVarCoeffD22, Nektar::SolverUtils::GetDiffusionFactory(), GetFluxVector(), m_diffusion, m_epsilon, Nektar::SolverUtils::UnsteadySystem::m_explicitDiffusion, Nektar::SolverUtils::EquationSystem::m_fields, Nektar::SolverUtils::UnsteadySystem::m_homoInitialFwd, Nektar::SolverUtils::UnsteadySystem::m_ode, Nektar::SolverUtils::EquationSystem::m_projectionType, Nektar::SolverUtils::EquationSystem::m_session, m_sVVCutoffRatio, m_sVVDiffCoeff, m_useSpecVanVisc, m_varcoeff, m_waveFreq, and Nektar::SolverUtils::UnsteadySystem::v_InitObject().

     {
         UnsteadySystem::v_InitObject();
 
         m_session->LoadParameter("wavefreq",   m_waveFreq, 0.0);
         m_session->LoadParameter("epsilon",    m_epsilon,  1.0);
 
         m_session->MatchSolverInfo(
             "SpectralVanishingViscosity", "True", m_useSpecVanVisc, false);
 
         if(m_useSpecVanVisc)
         {
             m_session->LoadParameter("SVVCutoffRatio",m_sVVCutoffRatio,0.75);
             m_session->LoadParameter("SVVDiffCoeff",m_sVVDiffCoeff,0.1);
         }
 
         int npoints = m_fields[0]->GetNpoints();
 
         if(m_session->DefinesParameter("d00"))
         {
             m_varcoeff[StdRegions::eVarCoeffD00]
             = Array<OneD, NekDouble>(npoints, m_session->GetParameter("d00"));
         }
         if(m_session->DefinesParameter("d11"))
         {
             m_varcoeff[StdRegions::eVarCoeffD11]
             = Array<OneD, NekDouble>(npoints, m_session->GetParameter("d11"));
         }
         if(m_session->DefinesParameter("d22"))
         {
             m_varcoeff[StdRegions::eVarCoeffD22]
             = Array<OneD, NekDouble>(npoints, m_session->GetParameter("d22"));
         }
 
         switch (m_projectionType)
         {
             case MultiRegions::eDiscontinuous:
             {
                 std::string diffName;
 
                 // Do not forwards transform initial condition
                 m_homoInitialFwd = false;
 
                 m_session->LoadSolverInfo("DiffusionType", diffName, "LDG");
                 m_diffusion = SolverUtils::GetDiffusionFactory().
                     CreateInstance(diffName, diffName);
                 m_diffusion->SetFluxVector(&UnsteadyDiffusion::
                                            GetFluxVector, this);
                 m_diffusion->InitObject(m_session, m_fields);
                 break;
             }
 
             case MultiRegions::eGalerkin:
             case MultiRegions::eMixed_CG_Discontinuous:
             {
                 // In case of Galerkin explicit diffusion gives an error
                 if (m_explicitDiffusion)
                 {
                     ASSERTL0(false, "Explicit Galerkin diffusion not set up.");
                 }
                 // In case of Galerkin implicit diffusion: do nothing
             }
         }
 
 
         if (m_explicitDiffusion)
         {
             m_ode.DefineOdeRhs    (&UnsteadyDiffusion::DoOdeRhs,        this);
             m_ode.DefineProjection(&UnsteadyDiffusion::DoOdeProjection, this);
         }
         else
         {
             m_ode.DefineImplicitSolve(
                                 &UnsteadyDiffusion::DoImplicitSolve, this);
         }
     }

Friends And Related Function Documentation

◆ MemoryManager< UnsteadyDiffusion >

friend class MemoryManager< UnsteadyDiffusion >

friend

Definition at line 48 of file UnsteadyDiffusion.h.

Member Data Documentation

◆ className

string Nektar::UnsteadyDiffusion::className = GetEquationSystemFactory().RegisterCreatorFunction("UnsteadyDiffusion", UnsteadyDiffusion::create)

static

Name of class.

Definition at line 61 of file UnsteadyDiffusion.h.

◆ m_diffusion

SolverUtils::DiffusionSharedPtr Nektar::UnsteadyDiffusion::m_diffusion

protected

Definition at line 70 of file UnsteadyDiffusion.h.

Referenced by DoOdeRhs(), and v_InitObject().

◆ m_epsilon

NekDouble Nektar::UnsteadyDiffusion::m_epsilon

private

Definition at line 101 of file UnsteadyDiffusion.h.

Referenced by DoImplicitSolve(), GetFluxVector(), and v_InitObject().

◆ m_riemannSolver

SolverUtils::RiemannSolverSharedPtr Nektar::UnsteadyDiffusion::m_riemannSolver

protected

Definition at line 71 of file UnsteadyDiffusion.h.

◆ m_sVVCutoffRatio

NekDouble Nektar::UnsteadyDiffusion::m_sVVCutoffRatio

protected

Definition at line 68 of file UnsteadyDiffusion.h.

Referenced by DoImplicitSolve(), v_GenerateSummary(), and v_InitObject().

◆ m_sVVDiffCoeff

NekDouble Nektar::UnsteadyDiffusion::m_sVVDiffCoeff

protected

Definition at line 69 of file UnsteadyDiffusion.h.

Referenced by DoImplicitSolve(), v_GenerateSummary(), and v_InitObject().

◆ m_useSpecVanVisc

bool Nektar::UnsteadyDiffusion::m_useSpecVanVisc

protected

Definition at line 67 of file UnsteadyDiffusion.h.

Referenced by DoImplicitSolve(), v_GenerateSummary(), and v_InitObject().

◆ m_varcoeff

StdRegions::VarCoeffMap Nektar::UnsteadyDiffusion::m_varcoeff

private

Definition at line 102 of file UnsteadyDiffusion.h.

Referenced by DoImplicitSolve(), and v_InitObject().

◆ m_waveFreq

NekDouble Nektar::UnsteadyDiffusion::m_waveFreq

private

Definition at line 100 of file UnsteadyDiffusion.h.

Referenced by v_InitObject().

Public Member Functions

Static Public Member Functions

Static Public Attributes

Protected Member Functions

Protected Attributes

Private Attributes

Friends

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ ~UnsteadyDiffusion()

◆ UnsteadyDiffusion()

Member Function Documentation

◆ create()

◆ DoImplicitSolve()

◆ DoOdeProjection()

◆ DoOdeRhs()

◆ GetFluxVector()

◆ v_GenerateSummary()

◆ v_InitObject()

Friends And Related Function Documentation

◆ MemoryManager< UnsteadyDiffusion >

Member Data Documentation

◆ className

◆ m_diffusion

◆ m_epsilon

◆ m_riemannSolver

◆ m_sVVCutoffRatio

◆ m_sVVDiffCoeff

◆ m_useSpecVanVisc

◆ m_varcoeff

◆ m_waveFreq