Nektar::FieldUtils::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::FieldUtils::ProcessGrad:

Collaboration diagram for Nektar::FieldUtils::ProcessGrad:

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

Definition at line 50 of file ProcessGrad.h.

Constructor & Destructor Documentation

Nektar::FieldUtils::ProcessGrad::ProcessGrad

(

FieldSharedPtr

f

)

Definition at line 57 of file ProcessGrad.cpp.

                                         : ProcessModule(f)
{
}

Nektar::FieldUtils::ProcessGrad::~ProcessGrad ( )

virtual

Definition at line 61 of file ProcessGrad.cpp.

{
}

Member Function Documentation

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

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

inlinevirtual

Implements Nektar::FieldUtils::Module.

Definition at line 66 of file ProcessGrad.h.

    {
        return "ProcessGrad";
    }

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

virtual

Write mesh to output file.

Implements Nektar::FieldUtils::Module.

Definition at line 65 of file ProcessGrad.cpp.

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

{
    if (m_f->m_verbose)
    {
        if (m_f->m_comm->TreatAsRankZero())
        {
            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);
        Vmath::Vcopy(npoints, grad[i], 1, m_f->m_exp[nfields + i]->UpdatePhys(),
                     1);
        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::FieldUtils::ProcessGrad::className

static

Initial value:

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

Definition at line 58 of file ProcessGrad.h.