Nektar::FieldUtils::ProcessC0Projection Class Reference

This processing module calculates the Q Criterion and adds it as an extra-field to the output file. More...

#include <ProcessC0Projection.h>

Inheritance diagram for Nektar::FieldUtils::ProcessC0Projection:

Collaboration diagram for Nektar::FieldUtils::ProcessC0Projection:

Public Member Functions
	ProcessC0Projection (FieldSharedPtr f)
virtual	~ProcessC0Projection ()
virtual void	Process (po::variables_map &vm)
	Write mesh to output file. More...
virtual std::string	GetModuleName ()
Public Member Functions inherited from Nektar::FieldUtils::ProcessModule
	ProcessModule ()
	ProcessModule (FieldSharedPtr p_f)
Public Member Functions inherited from Nektar::FieldUtils::Module
FIELD_UTILS_EXPORT	Module (FieldSharedPtr p_f)
FIELD_UTILS_EXPORT void	RegisterConfig (string key, string value)
	Register a configuration option with a module. More...
FIELD_UTILS_EXPORT void	PrintConfig ()
	Print out all configuration options for a module. More...
FIELD_UTILS_EXPORT void	SetDefaults ()
	Sets default configuration options for those which have not been set. More...
FIELD_UTILS_EXPORT bool	GetRequireEquiSpaced (void)
FIELD_UTILS_EXPORT void	SetRequireEquiSpaced (bool pVal)
FIELD_UTILS_EXPORT void	EvaluateTriFieldAtEquiSpacedPts (LocalRegions::ExpansionSharedPtr &exp, const Array< OneD, const NekDouble > &infield, Array< OneD, NekDouble > &outfield)

Static Public Member Functions
static boost::shared_ptr< Module >	create (FieldSharedPtr f)
	Creates an instance of this class. More...

Static Public Attributes
static ModuleKey	className

Additional Inherited Members
Protected Member Functions inherited from Nektar::FieldUtils::Module
	Module ()
Protected Attributes inherited from Nektar::FieldUtils::Module
FieldSharedPtr	m_f
	Field object. More...
map< string, ConfigOption >	m_config
	List of configuration values. More...
bool	m_requireEquiSpaced

Detailed Description

This processing module calculates the Q Criterion and adds it as an extra-field to the output file.

Definition at line 50 of file ProcessC0Projection.h.

Constructor & Destructor Documentation

Nektar::FieldUtils::ProcessC0Projection::ProcessC0Projection

(

FieldSharedPtr

f

)

Definition at line 56 of file ProcessC0Projection.cpp.

References Nektar::FieldUtils::Module::m_config.

                                                         : ProcessModule(f)
{
    m_config["fields"] = ConfigOption(false, "All", "Start field to project");
    m_config["localtoglobalmap"] = ConfigOption(
        true, "0", "Just perform a local to global mapping and back");
    m_config["usexmlbcs"] = ConfigOption(
        true, "0", "Use boundary conditions given in xml file. Requires all "
                   "projected fields to be defined in xml file");
    m_config["helmsmoothing"] = ConfigOption(
        false, "Not Set", "Use a Helmholtz smoother to remove high frequency "
                          "components above specified L");

    f->m_declareExpansionAsContField = true;
}

Nektar::FieldUtils::ProcessC0Projection::~ProcessC0Projection ( )

virtual

Definition at line 71 of file ProcessC0Projection.cpp.

{
}

Member Function Documentation

static boost::shared_ptr<Module> Nektar::FieldUtils::ProcessC0Projection::create ( FieldSharedPtr  f )

inlinestatic

Creates an instance of this class.

Definition at line 54 of file ProcessC0Projection.h.

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

    {
        return MemoryManager<ProcessC0Projection>::AllocateSharedPtr(f);
    }

virtual std::string Nektar::FieldUtils::ProcessC0Projection::GetModuleName ( )

inlinevirtual

Implements Nektar::FieldUtils::Module.

Definition at line 66 of file ProcessC0Projection.h.

    {
        return "ProcessC0Projection";
    }

void Nektar::FieldUtils::ProcessC0Projection::Process ( po::variables_map &  vm )

virtual

Write mesh to output file.

Implements Nektar::FieldUtils::Module.

Definition at line 75 of file ProcessC0Projection.cpp.

References ASSERTL0, Nektar::StdRegions::eFactorLambda, Nektar::ParseUtils::GenerateOrderedVector(), Nektar::FieldUtils::Module::m_config, Nektar::FieldUtils::Module::m_f, Vmath::Smul(), and Vmath::Vcopy().

{
    if (m_f->m_verbose)
    {
        if (m_f->m_comm->TreatAsRankZero())
        {
            cout << "ProcessC0Projection: Projecting field into C0 space..."
                 << endl;
        }
    }

    // ensure not using diagonal preconditioner since tends not to converge fo
    // mass matrix
    if (m_f->m_graph->GetMeshDimension() == 3)
    {
        if (boost::iequals(m_f->m_session->GetSolverInfo("GLOBALSYSSOLN"),
                           "IterativeStaticCond"))
        {
            if (boost::iequals(m_f->m_session->GetSolverInfo("PRECONDITIONER"),
                               "Diagonal"))
            {
                m_f->m_session->SetSolverInfo("PRECONDITIONER",
                                              "LowEnergyBlock");
            }
            if (boost::iequals(m_f->m_session->GetSolverInfo("PRECONDITIONER"),
                               "FullLinearSpaceWithDiagonal"))
            {
                m_f->m_session->SetSolverInfo(
                    "PRECONDITIONER", "FullLinearSpaceWithLowEnergyBlock");
            }

            if (m_f->m_verbose)
            {
                if (m_f->m_comm->GetRank() == 0)
                {
                    cout << "Resetting diagonal precondition to low energy "
                            "block "
                         << endl;
                }
            }
        }
    }
    bool JustPerformLocToGloMap = m_config["localtoglobalmap"].as<bool>();
    bool HelmSmoother =
        (boost::iequals(m_config["helmsmoothing"].as<string>(), "Not Set"))
            ? false
            : true;
    int nfields = m_f->m_exp.size();
    Array<OneD, MultiRegions::ExpListSharedPtr> C0ProjectExp(nfields);
    if (m_config["usexmlbcs"].as<bool>())
    {
        for (int i = 0; i < nfields; ++i)
        {
            C0ProjectExp[i] = m_f->m_exp[i];
        }
    }
    else
    {
        // generate a C0 expansion field with no boundary conditions.
        bool savedef                       = m_f->m_declareExpansionAsContField;
        bool savedef2                      = m_f->m_requireBoundaryExpansion;
        m_f->m_declareExpansionAsContField = true;
        m_f->m_requireBoundaryExpansion    = false;
        C0ProjectExp[0]                    = m_f->AppendExpList(
            m_f->m_fielddef[0]->m_numHomogeneousDir, "DefaultVar", true);
        m_f->m_declareExpansionAsContField = savedef;
        m_f->m_requireBoundaryExpansion    = savedef2;
        for (int i = 1; i < nfields; ++i)
        {
            C0ProjectExp[i] = C0ProjectExp[0];
        }
    }

    string fields = m_config["fields"].as<string>();
    vector<unsigned int> processFields;

    if (fields.compare("All") == 0)
    {
        for (int i = 0; i < nfields; ++i)
        {
            processFields.push_back(i);
        }
    }
    else
    {
        ASSERTL0(
            ParseUtils::GenerateOrderedVector(fields.c_str(), processFields),
            "Failed to interpret field string in C0Projection");
    }

    for (int i = 0; i < processFields.size(); ++i)
    {
        ASSERTL0(processFields[i] < nfields,
                 "Attempt to process field that is larger than then number of "
                 "fields available");

        if (m_f->m_verbose)
        {
            if (m_f->m_comm->GetRank() == 0)
            {
                cout << "\t Processing field: " << processFields[i] << endl;
            }
        }

        if (JustPerformLocToGloMap)
        {
            int ncoeffs = m_f->m_exp[0]->GetNcoeffs();
            Vmath::Vcopy(ncoeffs, m_f->m_exp[processFields[i]]->GetCoeffs(), 1,
                         C0ProjectExp[processFields[i]]->UpdateCoeffs(), 1);
            C0ProjectExp[processFields[i]]->LocalToGlobal();
            C0ProjectExp[processFields[i]]->GlobalToLocal();
            Vmath::Vcopy(ncoeffs, C0ProjectExp[processFields[i]]->GetCoeffs(),
                         1, m_f->m_exp[processFields[i]]->UpdateCoeffs(), 1);
        }
        else
        {
            if (HelmSmoother)
            {
                int dim          = m_f->m_graph->GetSpaceDimension();
                int npoints      = m_f->m_exp[0]->GetNpoints();
                NekDouble lambda = m_config["helmsmoothing"].as<NekDouble>();
                lambda           = 2 * M_PI / lambda;
                lambda           = lambda * lambda;

                if (m_f->m_verbose)
                {
                    cout << "Setting up Helmholtz smoother with lambda = "
                         << lambda << endl;
                }

                StdRegions::ConstFactorMap factors;
                Array<OneD, NekDouble> forcing(npoints);
                factors[StdRegions::eFactorLambda] = -lambda;

                Array<OneD, Array<OneD, NekDouble> > Velocity(dim);
                for (int j = 0; j < dim; ++j)
                {
                    Velocity[j] = Array<OneD, NekDouble>(npoints, 0.0);
                }

                C0ProjectExp[processFields[i]]->BwdTrans(
                    m_f->m_exp[processFields[i]]->GetCoeffs(),
                    m_f->m_exp[processFields[i]]->UpdatePhys());

                Vmath::Smul(npoints, -lambda,
                            m_f->m_exp[processFields[i]]->GetPhys(), 1, forcing,
                            1);

                // Note we are using the
                // LinearAdvectionDiffusionReaction solver here
                // instead of HelmSolve since lambda is negative and
                // so matrices are not positive definite. Ideally
                // should allow for negative lambda coefficient in
                // HelmSolve
                C0ProjectExp[processFields[i]]
                    ->LinearAdvectionDiffusionReactionSolve(
                        Velocity, forcing,
                        m_f->m_exp[processFields[i]]->UpdateCoeffs(), -lambda);
            }
            else
            {
                C0ProjectExp[processFields[i]]->BwdTrans(
                    m_f->m_exp[processFields[i]]->GetCoeffs(),
                    m_f->m_exp[processFields[i]]->UpdatePhys());
                C0ProjectExp[processFields[i]]->FwdTrans(
                    m_f->m_exp[processFields[i]]->GetPhys(),
                    m_f->m_exp[processFields[i]]->UpdateCoeffs());
            }
        }
    }

    // reset FieldDef in case of serial input and parallel output
    std::vector<LibUtilities::FieldDefinitionsSharedPtr> FieldDef =
        m_f->m_exp[0]->GetFieldDefinitions();
    // reset up FieldData with new values before projecting
    std::vector<std::vector<NekDouble> > FieldData(FieldDef.size());

    for (int i = 0; i < nfields; ++i)
    {
        for (int j = 0; j < FieldDef.size(); ++j)
        {
            FieldDef[j]->m_fields.push_back(m_f->m_fielddef[0]->m_fields[i]);
            m_f->m_exp[i]->AppendFieldData(FieldDef[j], FieldData[j]);
        }
    }

    m_f->m_fielddef = FieldDef;
    m_f->m_data     = FieldData;
}

Member Data Documentation

ModuleKey Nektar::FieldUtils::ProcessC0Projection::className

static

Initial value:

=
    GetModuleFactory().RegisterCreatorFunction(
        ModuleKey(eProcessModule, "C0Projection"),
        ProcessC0Projection::create,
        "Computes C0 projection.")

Definition at line 58 of file ProcessC0Projection.h.