Nektar::CFLtester Class Reference

#include <CFLtester.h>

Inheritance diagram for Nektar::CFLtester:

Public Member Functions
virtual	~CFLtester ()
Public Member Functions inherited from Nektar::SolverUtils::AdvectionSystem
SOLVER_UTILS_EXPORT	AdvectionSystem (const LibUtilities::SessionReaderSharedPtr &pSession, const SpatialDomains::MeshGraphSharedPtr &pGraph)
virtual SOLVER_UTILS_EXPORT	~AdvectionSystem ()
SOLVER_UTILS_EXPORT AdvectionSharedPtr	GetAdvObject ()
	Returns the advection object held by this instance. More...
SOLVER_UTILS_EXPORT Array< OneD, NekDouble >	GetElmtCFLVals (void)
SOLVER_UTILS_EXPORT NekDouble	GetCFLEstimate (int &elmtid)
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)

Static Public Attributes
static std::string	className = GetEquationSystemFactory().RegisterCreatorFunction("CFLtester", CFLtester::create, "Testing CFL restriction")

Protected Member Functions
	CFLtester (const LibUtilities::SessionReaderSharedPtr &pSession, const SpatialDomains::MeshGraphSharedPtr &pGraph)
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)
Array< OneD, NekDouble > &	GetNormalVelocity ()
	Get the normal velocity. More...
virtual void	v_InitObject ()
	Init object for UnsteadySystem class. More...
void	GetFluxVector (const Array< OneD, Array< OneD, NekDouble > > &physfield, Array< OneD, Array< OneD, Array< OneD, NekDouble > > > &flux)
virtual void	v_GenerateSummary (SummaryList &s)
	Print a summary of time stepping parameters. More...
Protected Member Functions inherited from Nektar::SolverUtils::AdvectionSystem
virtual SOLVER_UTILS_EXPORT bool	v_PostIntegrate (int step)
virtual SOLVER_UTILS_EXPORT Array< OneD, NekDouble >	v_GetMaxStdVelocity ()
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_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
SolverUtils::RiemannSolverSharedPtr	m_riemannSolver
Array< OneD, Array< OneD, NekDouble > >	m_velocity
Array< OneD, NekDouble >	m_traceVn
Protected Attributes inherited from Nektar::SolverUtils::AdvectionSystem
SolverUtils::AdvectionSharedPtr	m_advObject
	Advection term. More...
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 Member Functions
virtual NekDouble	v_GetTimeStep (const Array< OneD, int > ExpOrder, const Array< OneD, NekDouble > CFL, NekDouble timeCFL)
virtual NekDouble	v_GetTimeStep (int ExpOrder, NekDouble CFL, NekDouble TimeStability)
Array< OneD, NekDouble >	GetStdVelocity (const Array< OneD, Array< OneD, NekDouble > > inarray)

Friends
class	MemoryManager< CFLtester >

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 81 of file CFLtester.h.

Constructor & Destructor Documentation

~CFLtester()

Nektar::CFLtester::~CFLtester ( )

virtual

Definition at line 134 of file CFLtester.cpp.

    {
    }

CFLtester()

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

protected

Definition at line 47 of file CFLtester.cpp.

        : UnsteadySystem(pSession, pGraph),
          AdvectionSystem(pSession, pGraph)
    {
    }

Member Function Documentation

create()

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

inlinestatic

Definition at line 86 of file CFLtester.h.

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

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

DoOdeProjection()

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

protected

Definition at line 154 of file CFLtester.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 nvariables = inarray.num_elements();
        SetBoundaryConditions(time);

        switch(m_projectionType)
        {
            case MultiRegions::eDiscontinuous:
            {
                // Just copy over array
                int npoints = GetNpoints();

                for(int j = 0; j < nvariables; ++j)
                {
                    Vmath::Vcopy(npoints,inarray[j],1,outarray[j],1);
                }
            }
            break;
            case MultiRegions::eGalerkin:
            case MultiRegions::eMixed_CG_Discontinuous:
            {
                Array<OneD, NekDouble> coeffs(m_fields[0]->GetNcoeffs());

                for(int j = 0; j < nvariables; ++j)
                {
                    m_fields[j]->FwdTrans(inarray[j],coeffs);
                    m_fields[j]->BwdTrans_IterPerExp(coeffs,outarray[j]);
                }
                break;
            }
            default:
                ASSERTL0(false,"Unknown projection scheme");
                break;
        }
    }

DoOdeRhs()

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

protected

Definition at line 138 of file CFLtester.cpp.

References Nektar::SolverUtils::EquationSystem::GetNpoints(), Nektar::SolverUtils::AdvectionSystem::m_advObject, Nektar::SolverUtils::EquationSystem::m_fields, m_velocity, and Vmath::Neg().

Referenced by v_InitObject().

    {
        int nvariables = inarray.num_elements();
        int npoints = GetNpoints();

        m_advObject->Advect(nvariables, m_fields, m_velocity, inarray,
                            outarray, time);
        for(int j = 0; j < nvariables; ++j)
        {
            Vmath::Neg(npoints,outarray[j],1);
        }
    }

GetFluxVector()

void Nektar::CFLtester::GetFluxVector ( const Array< OneD, Array< OneD, NekDouble > > &  physfield, Array< OneD, Array< OneD, Array< OneD, NekDouble > > > &  flux  )

protected

Definition at line 221 of file CFLtester.cpp.

References ASSERTL1, m_velocity, and Vmath::Vmul().

Referenced by v_InitObject().

    {
        ASSERTL1(flux[0].num_elements() == m_velocity.num_elements(),
                 "Dimension of flux array and velocity array do not match");

        int nq = physfield[0].num_elements();

        for (int i = 0; i < flux.num_elements(); ++i)
        {
            for (int j = 0; j < flux[0].num_elements(); ++j)
            {
                Vmath::Vmul(nq, physfield[i], 1, m_velocity[j], 1,
                            flux[i][j], 1);
            }
        }
    }

GetNormalVelocity()

Array< OneD, NekDouble > & Nektar::CFLtester::GetNormalVelocity ( )

protected

Get the normal velocity.

Definition at line 196 of file CFLtester.cpp.

References Nektar::SolverUtils::EquationSystem::GetTraceNpoints(), Nektar::SolverUtils::EquationSystem::m_fields, Nektar::SolverUtils::EquationSystem::m_traceNormals, m_traceVn, m_velocity, Vmath::Vvtvp(), and Vmath::Zero().

Referenced by v_InitObject().

    {
        // Number of trace (interface) points
        int nTracePts = GetTraceNpoints();

        // Auxiliary variable to compute the normal velocity
        Array<OneD, NekDouble> tmp(nTracePts);

        // Reset the normal velocity
        Vmath::Zero(nTracePts, m_traceVn, 1);

        for (int i = 0; i < m_velocity.num_elements(); ++i)
        {
            m_fields[0]->ExtractTracePhys(m_velocity[i], tmp);

            Vmath::Vvtvp(nTracePts,
                         m_traceNormals[i], 1,
                         tmp,               1,
                         m_traceVn,         1,
                         m_traceVn,         1);
        }

        return m_traceVn;
    }

GetStdVelocity()

Array< OneD, NekDouble > Nektar::CFLtester::GetStdVelocity ( const Array< OneD, Array< OneD, NekDouble > >  inarray )

private

Definition at line 347 of file CFLtester.cpp.

References ASSERTL0, Nektar::SpatialDomains::eDeformed, Nektar::StdRegions::StdExpansion::GetTotPoints(), Nektar::SolverUtils::EquationSystem::GetTotPoints(), Nektar::SolverUtils::EquationSystem::m_expdim, and Nektar::SolverUtils::EquationSystem::m_fields.

Referenced by v_GetTimeStep().

    {
        // Checking if the problem is 2D
        ASSERTL0(m_expdim >= 2, "Method not implemented for 1D");
        
        int nTotQuadPoints  = GetTotPoints();
        int n_element       = m_fields[0]->GetExpSize();       
        int nvel            = inarray.num_elements();
        
        NekDouble pntVelocity;
        
        // Getting the standard velocity vector on the 2D normal space
        Array<OneD, Array<OneD, NekDouble> > stdVelocity(nvel);
        Array<OneD, NekDouble> stdV(n_element, 0.0);
        
        for (int i = 0; i < nvel; ++i)
        {
            stdVelocity[i] = Array<OneD, NekDouble>(nTotQuadPoints);
        }
        
        if (nvel == 2)
        {
            for (int el = 0; el < n_element; ++el)
            { 
                LocalRegions::Expansion2DSharedPtr el2D =
                    m_fields[0]->GetExp(el)->as<LocalRegions::Expansion2D>();
                int n_points = el2D->GetTotPoints();
                
                Array<OneD, const NekDouble> jac  = 
                        el2D->GetGeom2D()->GetMetricInfo()->GetJac();
                Array<TwoD, const NekDouble> gmat = 
                        el2D->GetGeom2D()->GetMetricInfo()->GetDerivFactors();
                
                if (el2D->GetGeom2D()->GetMetricInfo()->GetGtype()
                    == SpatialDomains::eDeformed)
                {
                    for (int i = 0; i < n_points; i++)
                    {
                        stdVelocity[0][i] = gmat[0][i]*inarray[0][i] 
                        + gmat[2][i]*inarray[1][i];
                        
                        stdVelocity[1][i] = gmat[1][i]*inarray[0][i] 
                        + gmat[3][i]*inarray[1][i];
                    }
                }
                else
                {
                    for (int i = 0; i < n_points; i++)
                    {
                        stdVelocity[0][i] = gmat[0][0]*inarray[0][i] 
                        + gmat[2][0]*inarray[1][i];
                        
                        stdVelocity[1][i] = gmat[1][0]*inarray[0][i] 
                        + gmat[3][0]*inarray[1][i];
                    }
                }
                
                
                for (int i = 0; i < n_points; i++)
                {
                    pntVelocity = sqrt(stdVelocity[0][i]*stdVelocity[0][i] 
                                       + stdVelocity[1][i]*stdVelocity[1][i]);
                    
                    if (pntVelocity>stdV[el])
                    {
                        stdV[el] = pntVelocity;
                    }
                }
            }
        }
        else
        {
            for (int el = 0; el < n_element; ++el)
            { 
                LocalRegions::Expansion3DSharedPtr el3D =
                    m_fields[0]->GetExp(el)->as<LocalRegions::Expansion3D>();

                int n_points = el3D->GetTotPoints();
                
                Array<OneD, const NekDouble> jac =
                        el3D->GetGeom3D()->GetMetricInfo()->GetJac();
                Array<TwoD, const NekDouble> gmat =
                        el3D->GetGeom3D()->GetMetricInfo()->GetDerivFactors();
                
                if (el3D->GetGeom3D()->GetMetricInfo()->GetGtype()
                    == SpatialDomains::eDeformed)
                {
                    for (int i = 0; i < n_points; i++)
                    {
                        stdVelocity[0][i] = gmat[0][i]*inarray[0][i] 
                        + gmat[3][i]*inarray[1][i] 
                        + gmat[6][i]*inarray[2][i];
                        
                        stdVelocity[1][i] = gmat[1][i]*inarray[0][i] 
                        + gmat[4][i]*inarray[1][i] 
                        + gmat[7][i]*inarray[2][i];
                        
                        stdVelocity[2][i] = gmat[2][i]*inarray[0][i] 
                        + gmat[5][i]*inarray[1][i] 
                        + gmat[8][i]*inarray[2][i];
                    }
                }
                else
                {
                    Array<OneD, const NekDouble> jac =
                            el3D->GetGeom3D()->GetMetricInfo()->GetJac();
                    Array<TwoD, const NekDouble> gmat = 
                            el3D->GetGeom3D()->GetMetricInfo()->GetDerivFactors();
                    
                    for (int i = 0; i < n_points; i++)
                    {
                        stdVelocity[0][i] = gmat[0][0]*inarray[0][i] 
                        + gmat[3][0]*inarray[1][i] 
                        + gmat[6][0]*inarray[2][i];
                        
                        stdVelocity[1][i] = gmat[1][0]*inarray[0][i] 
                        + gmat[4][0]*inarray[1][i] 
                        + gmat[7][0]*inarray[2][i];
                        
                        stdVelocity[2][i] = gmat[2][0]*inarray[0][i] 
                        + gmat[5][0]*inarray[1][i] 
                        + gmat[8][0]*inarray[2][i];
                    }
                }
                
                for (int i = 0; i < n_points; i++)
                {
                    pntVelocity = sqrt(stdVelocity[0][i]*stdVelocity[0][i] 
                                       + stdVelocity[1][i]*stdVelocity[1][i] 
                                       + stdVelocity[2][i]*stdVelocity[2][i]);
                    
                    if (pntVelocity > stdV[el])
                    {
                        stdV[el] = pntVelocity;
                    }
                }
            }
        }
        
        return stdV;
    }

v_GenerateSummary()

void Nektar::CFLtester::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 240 of file CFLtester.cpp.

References Nektar::SolverUtils::UnsteadySystem::v_GenerateSummary().

    {
        AdvectionSystem::v_GenerateSummary(s);
    }

v_GetTimeStep() [1/2]

NekDouble Nektar::CFLtester::v_GetTimeStep ( const Array< OneD, int >  ExpOrder, const Array< OneD, NekDouble >  CFL, NekDouble  timeCFL  )

privatevirtual

Definition at line 247 of file CFLtester.cpp.

References GetStdVelocity(), Nektar::SolverUtils::EquationSystem::m_fields, m_velocity, and Vmath::Vmin().

    { 
        
        int n_element       = m_fields[0]->GetExpSize();
        
        //const NekDouble minLengthStdTri  = 1.414213;
        //const NekDouble minLengthStdQuad = 2.0;
        //const NekDouble cLambda          = 0.2; // Spencer book pag. 317

        Array<OneD, NekDouble> tstep      (n_element, 0.0);
        Array<OneD, NekDouble> stdVelocity(n_element, 0.0);
        stdVelocity = GetStdVelocity(m_velocity);
        
        for (int el = 0; el < n_element; ++el)
        {
            int npoints = m_fields[0]->GetExp(el)->GetTotPoints();
            Array<OneD, NekDouble> one2D(npoints, 1.0);
            //NekDouble Area = m_fields[0]->GetExp(el)->Integral(one2D);
            if(std::dynamic_pointer_cast<LocalRegions::TriExp>(m_fields[0]->GetExp(el)))
            {
                //tstep[el] =  timeCFL/(stdVelocity[el]*cLambda*(ExpOrder[el]-1)*(ExpOrder[el]-1));
                //tstep[el] =  timeCFL*minLengthStdTri/(stdVelocity[el]*cLambda*(ExpOrder[el]-1)*(ExpOrder[el]-1));
                tstep[el] = CFL[el]/(stdVelocity[el]);
            }
            else if(std::dynamic_pointer_cast<LocalRegions::QuadExp>(m_fields[0]->GetExp(el)))
            { 
                //tstep[el] =  timeCFL/(stdVelocity[el]*cLambda*(ExpOrder[el]-1)*(ExpOrder[el]-1));
                //tstep[el] =  timeCFL*minLengthStdQuad/(stdVelocity[el]*cLambda*(ExpOrder[el]-1)*(ExpOrder[el]-1));
                tstep[el] = CFL[el]/(stdVelocity[el]);
            }
        }
        
        NekDouble TimeStep = Vmath::Vmin(n_element, tstep, 1);
        
        return TimeStep;
    }

v_GetTimeStep() [2/2]

NekDouble Nektar::CFLtester::v_GetTimeStep ( int  ExpOrder, NekDouble  CFL, NekDouble  TimeStability  )

privatevirtual

Definition at line 289 of file CFLtester.cpp.

References ASSERTL0, Nektar::EigenvaluesAnaMeshesAB2, Nektar::EigenvaluesAnaMeshesRK2, Nektar::EigenvaluesAnaMeshesRK4, Nektar::SolverUtils::EquationSystem::m_fields, and class_topology::P.

    {
        //================================================================
        // This function has been created just to test specific problems, hence is not general
        // and it has been implemented in a rude fashion, as the full CFLtester class.
        // For real CFL calculations refer to the general implementation above. (A.Bolis)
        //================================================================
        
        NekDouble TimeStep;
        NekDouble SpatialStability;
        int n_elements = m_fields[0]->GetExpSize();
        
        //solve ambiguity in windows
        NekDouble n_elem = n_elements;
        NekDouble DH     = sqrt(n_elem);
        
        int H = (int)DH;
        int P = ExpOrder-1;
        
        //================================================================
        // Regular meshes
        
        //SpatialStability = EigenvaluesRegMeshes[H-1][P-1];
        
        //================================================================
        // Anisotropic meshes
        
        if (TimeStability == 1.0) 
        {
            SpatialStability = EigenvaluesAnaMeshesAB2[H/2][P-1];
        }
        else if (TimeStability == 2.0) 
        {
            SpatialStability = EigenvaluesAnaMeshesRK2[H/2][P-1];
        }
        else if (TimeStability == 2.784) 
        {
            SpatialStability = EigenvaluesAnaMeshesRK4[H/2][P-1];
        }
        else 
        {
            ASSERTL0(false,"Dominant eigenvalues database not present for this time-stepping scheme")
        }
        
        //================================================================
        
        TimeStep = (TimeStability/SpatialStability)*CFL;
        
        //================================================================
        
        return TimeStep;
    }

v_InitObject()

void Nektar::CFLtester::v_InitObject ( )

protectedvirtual

Init object for UnsteadySystem class.

Initialization object for UnsteadySystem class.

Reimplemented from Nektar::SolverUtils::AdvectionSystem.

Definition at line 55 of file CFLtester.cpp.

References ASSERTL0, Nektar::LibUtilities::NekFactory< tKey, tBase, tParam >::CreateInstance(), Nektar::LibUtilities::TimeIntegrationSchemeOperators::DefineOdeRhs(), Nektar::LibUtilities::TimeIntegrationSchemeOperators::DefineProjection(), DoOdeProjection(), DoOdeRhs(), Nektar::MultiRegions::eDiscontinuous, Nektar::MultiRegions::eGalerkin, Nektar::MultiRegions::eMixed_CG_Discontinuous, Nektar::SolverUtils::GetAdvectionFactory(), GetFluxVector(), Nektar::SolverUtils::EquationSystem::GetFunction(), GetNormalVelocity(), Nektar::SolverUtils::GetRiemannSolverFactory(), Nektar::SolverUtils::EquationSystem::GetTraceNpoints(), Nektar::SolverUtils::AdvectionSystem::m_advObject, Nektar::SolverUtils::UnsteadySystem::m_explicitAdvection, Nektar::SolverUtils::EquationSystem::m_fields, Nektar::SolverUtils::UnsteadySystem::m_homoInitialFwd, Nektar::SolverUtils::UnsteadySystem::m_ode, Nektar::SolverUtils::EquationSystem::m_projectionType, m_riemannSolver, Nektar::SolverUtils::EquationSystem::m_session, Nektar::SolverUtils::EquationSystem::m_spacedim, m_traceVn, m_velocity, and Nektar::SolverUtils::AdvectionSystem::v_InitObject().

    {
        AdvectionSystem::v_InitObject();

        m_velocity = Array<OneD, Array<OneD, NekDouble> >(m_spacedim);
        std::vector<std::string> vel;
        vel.push_back("Vx");
        vel.push_back("Vy");
        vel.push_back("Vz");
        vel.resize(m_spacedim);

        GetFunction( "AdvectionVelocity")->Evaluate(vel,  m_velocity);

        // Type of advection class to be used
        switch(m_projectionType)
        {
            // Discontinuous field
            case MultiRegions::eDiscontinuous:
            {
                // Do not forwards transform initial condition
                m_homoInitialFwd = false;
                
                // Define the normal velocity fields
                if (m_fields[0]->GetTrace())
                {
                    m_traceVn = Array<OneD, NekDouble>(GetTraceNpoints());
                }

                string advName;
                string riemName;
                m_session->LoadSolverInfo(
                    "AdvectionType", advName, "WeakDG");
                m_advObject = SolverUtils::
                    GetAdvectionFactory().CreateInstance(advName, advName);
                m_advObject->SetFluxVector(
                    &CFLtester::GetFluxVector, this);
                m_session->LoadSolverInfo(
                    "UpwindType", riemName, "Upwind");
                m_riemannSolver = SolverUtils::
                    GetRiemannSolverFactory().CreateInstance(
                        riemName, m_session);
                m_riemannSolver->SetScalar(
                    "Vn", &CFLtester::GetNormalVelocity, this);

                m_advObject->SetRiemannSolver(m_riemannSolver);
                m_advObject->InitObject(m_session, m_fields);
                break;
            }
            // Continuous field
            case MultiRegions::eGalerkin:
            case MultiRegions::eMixed_CG_Discontinuous:
            {
                string advName;
                m_session->LoadSolverInfo(
                    "AdvectionType", advName, "NonConservative");
                m_advObject = SolverUtils::
                    GetAdvectionFactory().CreateInstance(advName, advName);
                m_advObject->SetFluxVector(
                    &CFLtester::GetFluxVector, this);
                break;
            }
            default:
            {
                ASSERTL0(false, "Unsupported projection type.");
                break;
            }
        }

        if (m_explicitAdvection)
        {
            m_ode.DefineOdeRhs     (&CFLtester::DoOdeRhs,        this);
            m_ode.DefineProjection (&CFLtester::DoOdeProjection, this);
        }
        else
        {
            ASSERTL0(false, "Implicit unsteady Advection not set up.");
        }
    }

Friends And Related Function Documentation

MemoryManager< CFLtester >

friend class MemoryManager< CFLtester >

friend

Definition at line 84 of file CFLtester.h.

Member Data Documentation

className

string Nektar::CFLtester::className = GetEquationSystemFactory().RegisterCreatorFunction("CFLtester", CFLtester::create, "Testing CFL restriction")

static

Definition at line 96 of file CFLtester.h.

m_riemannSolver

SolverUtils::RiemannSolverSharedPtr Nektar::CFLtester::m_riemannSolver

protected

Definition at line 101 of file CFLtester.h.

Referenced by v_InitObject().

m_traceVn

Array<OneD, NekDouble> Nektar::CFLtester::m_traceVn

protected

Definition at line 103 of file CFLtester.h.

Referenced by GetNormalVelocity(), and v_InitObject().

m_velocity

Array<OneD, Array<OneD, NekDouble> > Nektar::CFLtester::m_velocity

protected

Definition at line 102 of file CFLtester.h.

Referenced by DoOdeRhs(), GetFluxVector(), GetNormalVelocity(), v_GetTimeStep(), and v_InitObject().