Nektar::Utilities::ProcessGrad Class Reference

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

#include <ProcessGrad.h>

Inheritance diagram for Nektar::Utilities::ProcessGrad:

Collaboration diagram for Nektar::Utilities::ProcessGrad:

Public Member Functions
	ProcessGrad (FieldSharedPtr f)
virtual	~ProcessGrad ()
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 vorticity and adds it as an extra-field to the output file.

Definition at line 50 of file ProcessGrad.h.

Constructor & Destructor Documentation

Nektar::Utilities::ProcessGrad::ProcessGrad

(

FieldSharedPtr

f

)

Definition at line 57 of file ProcessGrad.cpp.

                                         : ProcessModule(f)
{
}

Nektar::Utilities::ProcessGrad::~ProcessGrad ( )

virtual

Definition at line 61 of file ProcessGrad.cpp.

{
}

Member Function Documentation

static boost::shared_ptr<Module> Nektar::Utilities::ProcessGrad::create ( FieldSharedPtr  f )

inlinestatic

Creates an instance of this class.

Definition at line 54 of file ProcessGrad.h.

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

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

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

virtual

Write mesh to output file.

Implements Nektar::Utilities::Module.

Definition at line 65 of file ProcessGrad.cpp.

References Nektar::MultiRegions::DirCartesianMap, Nektar::Utilities::ProcessMapping::GetMapping(), Nektar::Utilities::Module::m_f, Nektar::GlobalMapping::MappingSharedPtr, and Vmath::Vcopy().

{
    if (m_f->m_verbose)
    {
        cout << "ProcessGrad: Calculating gradients..." << endl;
    }

    int i, j;
    int expdim    = m_f->m_graph->GetMeshDimension();
    int spacedim  = m_f->m_fielddef[0]->m_numHomogeneousDir + expdim;
    int nfields   = m_f->m_fielddef[0]->m_fields.size();
    int addfields = nfields*spacedim;

    int npoints = m_f->m_exp[0]->GetNpoints();
    Array<OneD, Array<OneD, NekDouble> > grad(addfields);
    m_f->m_exp.resize(nfields+addfields);

    for (i = 0; i < addfields; ++i)
    {
        grad[i] = Array<OneD, NekDouble>(npoints);
    }
    
    Array<OneD, Array<OneD, NekDouble> >   tmp(spacedim);
    for( int i = 0; i<spacedim; i++)
    {
        tmp[i] = Array<OneD, NekDouble> (npoints);
    }
    
    // Get mapping
    GlobalMapping::MappingSharedPtr mapping = 
                            ProcessMapping::GetMapping(m_f);
    
    // Get velocity and convert to Cartesian system,
    //      if it is still in transformed system
    Array<OneD, Array<OneD, NekDouble> > vel (spacedim);
    if (m_f->m_fieldMetaDataMap.count("MappingCartesianVel"))
    {
        if(m_f->m_fieldMetaDataMap["MappingCartesianVel"] == "False")
        {
            // Initialize arrays and copy velocity
            for ( int i =0; i<spacedim; ++i )
            {
                vel[i] = Array<OneD, NekDouble> (npoints);      
                if (m_f->m_exp[0]->GetWaveSpace())
                {
                    m_f->m_exp[0]->HomogeneousBwdTrans(
                                            m_f->m_exp[i]->GetPhys(),
                                            vel[i]);
                }
                else
                {
                    Vmath::Vcopy(npoints, m_f->m_exp[i]->GetPhys(),1,
                                            vel[i],1);
                }

            }
            // Convert velocity to cartesian system
            mapping->ContravarToCartesian(vel, vel);            
            // Convert back to wavespace if necessary
            if (m_f->m_exp[0]->GetWaveSpace())
            {
                for ( int i =0; i<spacedim; ++i )
                {
                    m_f->m_exp[0]->HomogeneousFwdTrans(vel[i], vel[i]);
                }
            }        
        }
        else
        {
            for ( int i =0; i<spacedim; ++i )
            {
                vel[i] = Array<OneD, NekDouble> (npoints); 
                Vmath::Vcopy(npoints, m_f->m_exp[i]->GetPhys(), 1,
                                            vel[i], 1);
            }
        }
    }
    else
    {
        for ( int i =0; i<spacedim; ++i )
        {
            vel[i] = Array<OneD, NekDouble> (npoints); 
            Vmath::Vcopy(npoints, m_f->m_exp[i]->GetPhys(), 1,
                                        vel[i], 1);
        }        
    }

    // Calculate Gradient
    for (i = 0; i < nfields; ++i)
    {
        for (j = 0; j < spacedim; ++j)
        {
            if (i<spacedim)
            {
                m_f->m_exp[i]->PhysDeriv(MultiRegions::DirCartesianMap[j],
                                         vel[i],
                                         tmp[j]);
            }
            else
            {
                m_f->m_exp[i]->PhysDeriv(MultiRegions::DirCartesianMap[j],
                                         m_f->m_exp[i]->GetPhys(),
                                         tmp[j]);                
            }
        }
        mapping->CovarToCartesian(tmp, tmp);
        for( int j = 0; j<spacedim; j++)
        {
            Vmath::Vcopy(npoints, tmp[j], 1, grad[i*spacedim+j], 1 );
        }
    }

    for (i = 0; i < addfields; ++i)
    {
        m_f->m_exp[nfields + i] = m_f->AppendExpList(m_f->m_fielddef[0]->m_numHomogeneousDir);
        m_f->m_exp[nfields + i]->UpdatePhys() = grad[i];
        m_f->m_exp[nfields + i]->FwdTrans_IterPerExp(grad[i],
                            m_f->m_exp[nfields + i]->UpdateCoeffs());
    }

    vector<string > outname;
    for (i = 0; i<nfields; ++i)
    {
        if(spacedim == 1)
        {
            outname.push_back(m_f->m_fielddef[0]->m_fields[i]+"_x");
        }
        else if (spacedim == 2)
        {
            outname.push_back(m_f->m_fielddef[0]->m_fields[i]+"_x");
            outname.push_back(m_f->m_fielddef[0]->m_fields[i]+"_y");
        }
        else if (spacedim == 3)
        {
            outname.push_back(m_f->m_fielddef[0]->m_fields[i]+"_x");
            outname.push_back(m_f->m_fielddef[0]->m_fields[i]+"_y");
            outname.push_back(m_f->m_fielddef[0]->m_fields[i]+"_z");
        }
    }

    std::vector<LibUtilities::FieldDefinitionsSharedPtr> FieldDef
        = m_f->m_exp[0]->GetFieldDefinitions();
    std::vector<std::vector<NekDouble> > FieldData(FieldDef.size());

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

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

Member Data Documentation

ModuleKey Nektar::Utilities::ProcessGrad::className

static

Initial value:

=
    GetModuleFactory().RegisterCreatorFunction(
        ModuleKey(eProcessModule, "gradient"),
        ProcessGrad::create, "Computes gradient of fields.")

Definition at line 57 of file ProcessGrad.h.