Nektar::SolverUtils::ForcingBody Class Reference

#include <ForcingBody.h>

Inheritance diagram for Nektar::SolverUtils::ForcingBody:

Static Public Member Functions
static SOLVER_UTILS_EXPORT ForcingSharedPtr	create (const LibUtilities::SessionReaderSharedPtr &pSession, const std::weak_ptr< 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	classNameBody
	Name of the class. More...
static std::string	classNameField

Protected Member Functions
SOLVER_UTILS_EXPORT void	v_InitObject (const Array< OneD, MultiRegions::ExpListSharedPtr > &pFields, const unsigned int &pNumForcingFields, const TiXmlElement *pForce) override
SOLVER_UTILS_EXPORT 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) override
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) override
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	~Forcing ()=default
virtual SOLVER_UTILS_EXPORT void	v_InitObject (const Array< OneD, MultiRegions::ExpListSharedPtr > &pFields, const unsigned int &pNumForcingFields, const TiXmlElement *pForce)=0
virtual SOLVER_UTILS_EXPORT 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)=0
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)

Private Member Functions
	ForcingBody (const LibUtilities::SessionReaderSharedPtr &pSession, const std::weak_ptr< EquationSystem > &pEquation)
	~ForcingBody (void) override=default
void	Update (const Array< OneD, MultiRegions::ExpListSharedPtr > &pFields, const Array< OneD, Array< OneD, NekDouble > > &inarray, const NekDouble &time)

Private Attributes
std::string	m_funcName
bool	m_hasTimeFcnScaling
LibUtilities::EquationSharedPtr	m_timeFcnEqn
bool	m_homogeneous
bool	m_hasEvars
std::map< int, std::vector< int > >	m_eqnEvars

Friends
class	MemoryManager< ForcingBody >

Additional Inherited Members
Public Member Functions inherited from Nektar::SolverUtils::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 ()
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...

Detailed Description

Definition at line 48 of file ForcingBody.h.

Constructor & Destructor Documentation

ForcingBody()

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

private

Definition at line 50 of file ForcingBody.cpp.

    : Forcing(pSession, pEquation), m_hasTimeFcnScaling(false)
{
}

~ForcingBody()

Nektar::SolverUtils::ForcingBody::~ForcingBody ( void  )

overrideprivatedefault

Member Function Documentation

create()

static SOLVER_UTILS_EXPORT ForcingSharedPtr Nektar::SolverUtils::ForcingBody::create ( const LibUtilities::SessionReaderSharedPtr &  pSession, const std::weak_ptr< 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 54 of file ForcingBody.h.

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

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

Update()

void Nektar::SolverUtils::ForcingBody::Update ( const Array< OneD, MultiRegions::ExpListSharedPtr > &  pFields, const Array< OneD, Array< OneD, NekDouble > > &  inarray, const NekDouble &  time  )

private

Definition at line 163 of file ForcingBody.cpp.

{
    std::vector<Array<OneD, const NekDouble>> fielddata;
    int nq = pFields[0]->GetNpoints();
    if (m_hasEvars)
    {
        Array<OneD, NekDouble> xc(nq), yc(nq), zc(nq), t(nq, time);
        pFields[0]->GetCoords(xc, yc, zc);
        fielddata.push_back(xc);
        fielddata.push_back(yc);
        fielddata.push_back(zc);
        fielddata.push_back(t);
    }
 
    for (const auto &it : m_eqnEvars)
    {
        int i = it.first;
        if (it.second.size() > 0)
        {
            // Coupled forcing, reset fielddata for each equation
            fielddata.resize(4);
            for (int j : it.second)
            {
                if (m_homogeneous && pFields[i]->GetWaveSpace())
                {
                    Array<OneD, NekDouble> tmp(nq);
                    pFields[i]->HomogeneousBwdTrans(nq, inarray[j], tmp);
                    fielddata.push_back(tmp);
                }
                else
                {
                    fielddata.push_back(inarray[j]);
                }
            }
            m_session->GetFunction(m_funcName, m_session->GetVariable(i))
                ->Evaluate(fielddata, m_Forcing[i]);
        }
        else
        {
            GetFunction(pFields, m_session, m_funcName, true)
                ->Evaluate(m_session->GetVariable(i), m_Forcing[i], time);
        }
 
        // If homogeneous expansion is used, transform the forcing term to
        // be in the Fourier space
        if (m_homogeneous)
        {
            pFields[i]->HomogeneousFwdTrans(pFields[i]->GetTotPoints(),
                                            m_Forcing[i], m_Forcing[i]);
        }
    }
}

References Nektar::SolverUtils::Forcing::GetFunction(), m_eqnEvars, Nektar::SolverUtils::Forcing::m_Forcing, m_funcName, m_hasEvars, m_homogeneous, and Nektar::SolverUtils::Forcing::m_session.

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

v_Apply()

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

overrideprotectedvirtual

Implements Nektar::SolverUtils::Forcing.

Definition at line 218 of file ForcingBody.cpp.

{
    if (m_hasTimeFcnScaling)
    {
        Array<OneD, NekDouble> TimeFcn(1);
        EvaluateTimeFunction(time, m_timeFcnEqn, TimeFcn);
 
        for (const auto &it : m_eqnEvars)
        {
            int i = it.first;
            Vmath::Svtvp(outarray[i].size(), TimeFcn[0], m_Forcing[i], 1,
                         outarray[i], 1, outarray[i], 1);
        }
    }
    else
    {
        Update(fields, inarray, time);
 
        for (const auto &it : m_eqnEvars)
        {
            int i = it.first;
            Vmath::Vadd(outarray[i].size(), outarray[i], 1, m_Forcing[i], 1,
                        outarray[i], 1);
        }
    }
}

References Nektar::SolverUtils::Forcing::EvaluateTimeFunction(), m_eqnEvars, Nektar::SolverUtils::Forcing::m_Forcing, m_hasTimeFcnScaling, m_timeFcnEqn, Vmath::Svtvp(), Update(), and Vmath::Vadd().

v_ApplyCoeff()

void Nektar::SolverUtils::ForcingBody::v_ApplyCoeff ( const Array< OneD, MultiRegions::ExpListSharedPtr > &  fields, const Array< OneD, Array< OneD, NekDouble > > &  inarray, Array< OneD, Array< OneD, NekDouble > > &  outarray, const NekDouble &  time  )

overrideprotectedvirtual

Reimplemented from Nektar::SolverUtils::Forcing.

Definition at line 248 of file ForcingBody.cpp.

{
    int ncoeff = outarray[m_NumVariable - 1].size();
    Array<OneD, NekDouble> tmp(ncoeff, 0.0);
 
    if (m_hasTimeFcnScaling)
    {
        Array<OneD, NekDouble> TimeFcn(1);
        EvaluateTimeFunction(time, m_timeFcnEqn, TimeFcn);
 
        for (const auto &it : m_eqnEvars)
        {
            int i = it.first;
            fields[i]->FwdTrans(m_Forcing[i], tmp);
            Vmath::Svtvp(ncoeff, TimeFcn[0], tmp, 1, outarray[i], 1,
                         outarray[i], 1);
        }
    }
    else
    {
        Update(fields, inarray, time);
 
        for (const auto &it : m_eqnEvars)
        {
            int i = it.first;
            fields[i]->FwdTrans(m_Forcing[i], tmp);
            Vmath::Vadd(ncoeff, outarray[i], 1, tmp, 1, outarray[i], 1);
        }
    }
}

References Nektar::SolverUtils::Forcing::EvaluateTimeFunction(), m_eqnEvars, Nektar::SolverUtils::Forcing::m_Forcing, m_hasTimeFcnScaling, Nektar::SolverUtils::Forcing::m_NumVariable, m_timeFcnEqn, Vmath::Svtvp(), Update(), and Vmath::Vadd().

v_InitObject()

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

overrideprotectedvirtual

Implements Nektar::SolverUtils::Forcing.

Definition at line 56 of file ForcingBody.cpp.

{
    m_NumVariable = pNumForcingFields;
 
    const TiXmlElement *funcNameElmt = pForce->FirstChildElement("BODYFORCE");
    if (!funcNameElmt)
    {
        funcNameElmt = pForce->FirstChildElement("FIELDFORCE");
 
        ASSERTL0(funcNameElmt,
                 "Requires BODYFORCE or FIELDFORCE tag "
                 "specifying function name which prescribes body force.");
    }
 
    m_funcName = funcNameElmt->GetText();
    ASSERTL0(m_session->DefinesFunction(m_funcName),
             "Function '" + m_funcName + "' not defined.");
 
    m_homogeneous = pFields[0]->GetExpType() == MultiRegions::e3DH1D ||
                    pFields[0]->GetExpType() == MultiRegions::e3DH2D;
 
    // Time function is optional
    funcNameElmt = pForce->FirstChildElement("BODYFORCETIMEFCN");
    if (!funcNameElmt)
    {
        funcNameElmt = pForce->FirstChildElement("FIELDFORCETIMEFCN");
    }
 
    // Load time function if specified
    if (funcNameElmt)
    {
        std::string funcNameTime = funcNameElmt->GetText();
 
        ASSERTL0(!funcNameTime.empty(),
                 "Expression must be given in BODYFORCETIMEFCN or "
                 "FIELDFORCETIMEFCN.");
 
        m_timeFcnEqn = MemoryManager<LibUtilities::Equation>::AllocateSharedPtr(
            m_session->GetInterpreter(), funcNameTime);
 
        m_hasTimeFcnScaling = true;
    }
 
    Array<OneD, Array<OneD, NekDouble>> tmp(m_NumVariable);
    for (int i = 0; i < m_NumVariable; ++i)
    {
        tmp[i] = pFields[i]->GetPhys();
    }
 
    std::map<std::string, int> varIndex;
    for (int i = 0; i < m_NumVariable; ++i)
    {
        varIndex[m_session->GetVariable(i)] = i;
        if (m_session->DefinesFunction(m_funcName, m_session->GetVariable(i)))
        {
            m_eqnEvars[i] = std::vector<int>();
        }
    }
    m_hasEvars = false;
    for (auto &it : m_eqnEvars)
    {
        std::string varStr = m_session->GetVariable(it.first);
        if (LibUtilities::eFunctionTypeExpression ==
            m_session->GetFunctionType(m_funcName, varStr))
        {
            LibUtilities::EquationSharedPtr eqn =
                m_session->GetFunction(m_funcName, varStr);
            std::string vlist = eqn->GetVlist();
            if (!boost::iequals(vlist, "x y z t"))
            {
                // Coupled forcing
                m_hasEvars = true;
                std::vector<std::string> vars;
                boost::split(vars, vlist, boost::is_any_of(", "));
                for (size_t j = 4; j < vars.size(); ++j)
                {
                    if (vars[j].size() != 0 &&
                        varIndex.find(vars[j]) == varIndex.end())
                    {
                        NEKERROR(ErrorUtil::efatal,
                                 "Variable '" + vars[j] +
                                     "' cannot be used as equation variable in "
                                     "the body force '" +
                                     m_funcName + "'.");
                    }
                    if (vars[j].size() &&
                        varIndex.find(vars[j]) != varIndex.end())
                    {
                        it.second.push_back(varIndex[vars[j]]);
                    }
                }
            }
        }
    }
 
    m_Forcing = Array<OneD, Array<OneD, NekDouble>>(m_NumVariable);
    for (const auto &it : m_eqnEvars)
    {
        m_Forcing[it.first] =
            Array<OneD, NekDouble>(pFields[0]->GetTotPoints(), 0.0);
    }
 
    Update(pFields, tmp, 0.0);
}

References Nektar::MemoryManager< DataType >::AllocateSharedPtr(), ASSERTL0, Nektar::MultiRegions::e3DH1D, Nektar::MultiRegions::e3DH2D, Nektar::ErrorUtil::efatal, Nektar::LibUtilities::eFunctionTypeExpression, m_eqnEvars, Nektar::SolverUtils::Forcing::m_Forcing, m_funcName, m_hasEvars, m_hasTimeFcnScaling, m_homogeneous, Nektar::SolverUtils::Forcing::m_NumVariable, Nektar::SolverUtils::Forcing::m_session, m_timeFcnEqn, NEKERROR, and Update().

Friends And Related Function Documentation

MemoryManager< ForcingBody >

friend class MemoryManager< ForcingBody >

friend

Definition at line 1 of file ForcingBody.h.

Member Data Documentation

classNameBody

std::string Nektar::SolverUtils::ForcingBody::classNameBody

static

Initial value:

=
    GetForcingFactory().RegisterCreatorFunction("Body", ForcingBody::create,
                                                "Body Forcing")

Name of the class.

Definition at line 67 of file ForcingBody.h.

classNameField

std::string Nektar::SolverUtils::ForcingBody::classNameField

static

Initial value:

=
    GetForcingFactory().RegisterCreatorFunction("Field", ForcingBody::create,
                                                "Field Forcing")

Definition at line 68 of file ForcingBody.h.

m_eqnEvars

std::map<int, std::vector<int> > Nektar::SolverUtils::ForcingBody::m_eqnEvars

private

Definition at line 94 of file ForcingBody.h.

Referenced by Update(), v_Apply(), v_ApplyCoeff(), and v_InitObject().

m_funcName

std::string Nektar::SolverUtils::ForcingBody::m_funcName

private

Definition at line 89 of file ForcingBody.h.

Referenced by Update(), and v_InitObject().

m_hasEvars

bool Nektar::SolverUtils::ForcingBody::m_hasEvars

private

Definition at line 93 of file ForcingBody.h.

Referenced by Update(), and v_InitObject().

m_hasTimeFcnScaling

bool Nektar::SolverUtils::ForcingBody::m_hasTimeFcnScaling

private

Definition at line 90 of file ForcingBody.h.

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

m_homogeneous

bool Nektar::SolverUtils::ForcingBody::m_homogeneous

private

Definition at line 92 of file ForcingBody.h.

Referenced by Update(), and v_InitObject().

m_timeFcnEqn

LibUtilities::EquationSharedPtr Nektar::SolverUtils::ForcingBody::m_timeFcnEqn

private

Definition at line 91 of file ForcingBody.h.

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