Nektar::Utilities::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::Utilities::ProcessC0Projection:

Collaboration diagram for Nektar::Utilities::ProcessC0Projection:

Public Member Functions
	ProcessC0Projection (FieldSharedPtr f)
virtual	~ProcessC0Projection ()
virtual void	Process (po::variables_map &vm)
	Write mesh to output file. More...
Public Member Functions inherited from Nektar::Utilities::ProcessModule
	ProcessModule ()
	ProcessModule (FieldSharedPtr p_f)
	ProcessModule (MeshSharedPtr p_m)
Public Member Functions inherited from Nektar::Utilities::Module
	Module (FieldSharedPtr p_f)
void	RegisterConfig (string key, string value)
	Register a configuration option with a module. More...
void	PrintConfig ()
	Print out all configuration options for a module. More...
void	SetDefaults ()
	Sets default configuration options for those which have not been set. More...
bool	GetRequireEquiSpaced (void)
void	SetRequireEquiSpaced (bool pVal)
void	EvaluateTriFieldAtEquiSpacedPts (LocalRegions::ExpansionSharedPtr &exp, const Array< OneD, const NekDouble > &infield, Array< OneD, NekDouble > &outfield)
	Module (MeshSharedPtr p_m)
virtual void	Process ()=0
void	RegisterConfig (string key, string value)
void	PrintConfig ()
void	SetDefaults ()
MeshSharedPtr	GetMesh ()
virtual void	ProcessVertices ()
	Extract element vertices. More...
virtual void	ProcessEdges (bool ReprocessEdges=true)
	Extract element edges. More...
virtual void	ProcessFaces (bool ReprocessFaces=true)
	Extract element faces. More...
virtual void	ProcessElements ()
	Generate element IDs. More...
virtual void	ProcessComposites ()
	Generate composites. More...
virtual void	ClearElementLinks ()

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::Utilities::Module
	Module ()
void	ReorderPrisms (PerMap &perFaces)
	Reorder node IDs so that prisms and tetrahedra are aligned correctly. More...
void	PrismLines (int prism, PerMap &perFaces, set< int > &prismsDone, vector< ElementSharedPtr > &line)
Protected Attributes inherited from Nektar::Utilities::Module
FieldSharedPtr	m_f
	Field object. More...
map< string, ConfigOption >	m_config
	List of configuration values. More...
bool	m_requireEquiSpaced
MeshSharedPtr	m_mesh
	Mesh object. More...

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::Utilities::ProcessC0Projection::ProcessC0Projection

(

FieldSharedPtr

f

)

Definition at line 55 of file ProcessC0Projection.cpp.

References Nektar::Utilities::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::Utilities::ProcessC0Projection::~ProcessC0Projection ( )

virtual

Definition at line 65 of file ProcessC0Projection.cpp.

{
}

Member Function Documentation

static boost::shared_ptr<Module> Nektar::Utilities::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);
        }

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

virtual

Write mesh to output file.

Implements Nektar::Utilities::Module.

Definition at line 69 of file ProcessC0Projection.cpp.

References ASSERTL0, Nektar::StdRegions::eFactorLambda, Nektar::ParseUtils::GenerateOrderedVector(), Nektar::Utilities::Module::m_config, Nektar::Utilities::Module::m_f, Vmath::Smul(), Nektar::Timer::Start(), Nektar::Timer::Stop(), Nektar::Timer::TimePerTest(), and Vmath::Vcopy().

{
    Timer timer;

    if (m_f->m_verbose)
    {
        if(m_f->m_comm->GetRank() == 0)
        {
            cout << "ProcessC0Projection: Projecting field into C0 space..."
                 << endl;
            timer.Start();
        }
    }

    // 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;
        m_f->m_declareExpansionAsContField = true;
        C0ProjectExp[0] = m_f->AppendExpList(m_f->m_fielddef[0]->m_numHomogeneousDir,
                                             "DefaultVar",true);
        m_f->m_declareExpansionAsContField = savedef;
        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 i =0; i < dim; ++i)
                {
                    Velocity[i] = 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;

    if(m_f->m_verbose)
    {
        if(m_f->m_comm->GetRank() == 0)
        {
            timer.Stop();
            NekDouble cpuTime = timer.TimePerTest(1);
            
            stringstream ss;
            ss << cpuTime << "s";
            cout << "C0 Projection CPU Time: " << setw(8) << left
                 << ss.str() << endl;
            cpuTime = 0.0;
        }
    }
}

Member Data Documentation

ModuleKey Nektar::Utilities::ProcessC0Projection::className

static

Initial value:

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

Definition at line 58 of file ProcessC0Projection.h.