Nektar::FieldUtils::ProcessCombineAvg Class Reference

This processing module combines two fld files containing average fields. More...

#include <ProcessCombineAvg.h>

Inheritance diagram for Nektar::FieldUtils::ProcessCombineAvg:

Public Member Functions
	ProcessCombineAvg (FieldSharedPtr f)
virtual	~ProcessCombineAvg ()
virtual void	Process (po::variables_map &vm)
	Write mesh to output file. More...
virtual std::string	GetModuleName ()
virtual std::string	GetModuleDescription ()
virtual ModulePriority	GetModulePriority ()
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 (std::string key, std::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 void	EvaluateTriFieldAtEquiSpacedPts (LocalRegions::ExpansionSharedPtr &exp, const Array< OneD, const NekDouble > &infield, Array< OneD, NekDouble > &outfield)

Static Public Member Functions
static std::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...
std::map< std::string, ConfigOption >	m_config
	List of configuration values. More...

Detailed Description

This processing module combines two fld files containing average fields.

Definition at line 50 of file ProcessCombineAvg.h.

Constructor & Destructor Documentation

ProcessCombineAvg()

Nektar::FieldUtils::ProcessCombineAvg::ProcessCombineAvg

(

FieldSharedPtr

f

)

Definition at line 57 of file ProcessCombineAvg.cpp.

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

                                                     : ProcessModule(f)
{
    m_config["fromfld"] =
        ConfigOption(false, "NotSet", "Fld file form which to add field");
}

~ProcessCombineAvg()

Nektar::FieldUtils::ProcessCombineAvg::~ProcessCombineAvg ( )

virtual

Definition at line 63 of file ProcessCombineAvg.cpp.

{
}

Member Function Documentation

create()

static std::shared_ptr<Module> Nektar::FieldUtils::ProcessCombineAvg::create ( FieldSharedPtr  f )

inlinestatic

Creates an instance of this class.

Definition at line 54 of file ProcessCombineAvg.h.

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

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

GetModuleDescription()

virtual std::string Nektar::FieldUtils::ProcessCombineAvg::GetModuleDescription ( )

inlinevirtual

Reimplemented from Nektar::FieldUtils::Module.

Definition at line 71 of file ProcessCombineAvg.h.

    {
        return "Combining new fld into input avg fld";
    }

GetModuleName()

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

inlinevirtual

Implements Nektar::FieldUtils::Module.

Definition at line 66 of file ProcessCombineAvg.h.

    {
        return "ProcessCombineAvg";
    }

GetModulePriority()

virtual ModulePriority Nektar::FieldUtils::ProcessCombineAvg::GetModulePriority ( )

inlinevirtual

Implements Nektar::FieldUtils::Module.

Definition at line 76 of file ProcessCombineAvg.h.

References Nektar::FieldUtils::eModifyExp.

    {
        return eModifyExp;
    }

Process()

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

virtual

Write mesh to output file.

Implements Nektar::FieldUtils::Module.

Definition at line 67 of file ProcessCombineAvg.cpp.

References ASSERTL0, Nektar::FieldUtils::Module::m_config, Nektar::FieldUtils::Module::m_f, Vmath::Smul(), Vmath::Svtvp(), Vmath::Vadd(), Vmath::Vmul(), and Vmath::Vsub().

{
    boost::ignore_unused(vm);

    // Skip in case of empty partition
    if (m_f->m_exp[0]->GetNumElmts() == 0)
    {
        return;
    }

    ASSERTL0(m_config["fromfld"].as<string>().compare("NotSet") != 0,
             "Need to specify fromfld=file.fld ");

    int nfields  = m_f->m_variables.size();
    int nq       = m_f->m_exp[0]->GetTotPoints();
    int expdim   = m_f->m_graph->GetMeshDimension();
    int spacedim = expdim;
    if ((m_f->m_numHomogeneousDir) == 1 || (m_f->m_numHomogeneousDir) == 2)
    {
        spacedim += m_f->m_numHomogeneousDir;
    }

    // Allocate storage for new field and correction (for Reynolds stress)
    Array<OneD, Array<OneD, NekDouble> > fromPhys(nfields);
    Array<OneD, Array<OneD, NekDouble> > correction(nfields);
    for (int j = 0; j < nfields; ++j)
    {
        fromPhys[j]   = Array<OneD, NekDouble>(nq, 0.0);
        correction[j] = Array<OneD, NekDouble>(nq, 0.0);
    }

    string fromfld           = m_config["fromfld"].as<string>();
    FieldSharedPtr fromField = std::shared_ptr<Field>(new Field());
    LibUtilities::FieldMetaDataMap fromFieldMetaDataMap;

    // Set up ElementGIDs in case of parallel processing
    Array<OneD, int> ElementGIDs(m_f->m_exp[0]->GetExpSize());
    for (int i = 0; i < m_f->m_exp[0]->GetExpSize(); ++i)
    {
        ElementGIDs[i] = m_f->m_exp[0]->GetExp(i)->GetGeom()->GetGlobalID();
    }
    // Import fromfld file
    m_f->FieldIOForFile(fromfld)->Import(
        fromfld, fromField->m_fielddef, fromField->m_data, fromFieldMetaDataMap,
        ElementGIDs);
    ASSERTL0(fromField->m_fielddef[0]->m_fields.size() == nfields,
             "Mismatch in number of fields");
    // Extract data to fromPhys
    for (int j = 0; j < nfields; ++j)
    {
        ASSERTL0(fromField->m_fielddef[0]->m_fields[j] ==
                     m_f->m_variables[j],
                 "Field names do not match.");

        // load new field (overwrite m_f->m_exp coeffs for now)
        for (int i = 0; i < fromField->m_data.size(); ++i)
        {
            m_f->m_exp[j]->ExtractDataToCoeffs(
                fromField->m_fielddef[i], fromField->m_data[i],
                m_f->m_variables[j],
                m_f->m_exp[j]->UpdateCoeffs());
        }
        m_f->m_exp[j]->BwdTrans(m_f->m_exp[j]->GetCoeffs(), fromPhys[j]);
    }

    // Load number of samples in each file
    ASSERTL0(m_f->m_fieldMetaDataMap.count("NumberOfFieldDumps") != 0,
             "Missing NumberOfFieldDumps metadata.");
    ASSERTL0(fromFieldMetaDataMap.count("NumberOfFieldDumps") != 0,
             "Missing NumberOfFieldDumps metadata.");
    string s_num;
    s_num  = m_f->m_fieldMetaDataMap["NumberOfFieldDumps"];
    int na = atoi(s_num.c_str());
    s_num  = fromFieldMetaDataMap["NumberOfFieldDumps"];
    int nb = atoi(s_num.c_str());

    // Look for Reynolds stresses
    int stress = -1;
    for (int j = 0; j < nfields; ++j)
    {
        if (m_f->m_variables[j] == "uu")
        {
            stress = j;
            break;
        }
    }

    // Calculate correction for Reynolds stresses
    if (stress != -1)
    {
        Array<OneD, NekDouble> tmp(nq, 0.0);
        int n = stress;
        // Follow same numbering as FilterReynoldsStresses
        for (int i = 0; i < spacedim; ++i)
        {
            for (int j = i; j < spacedim; ++j, ++n)
            {
                // correction is zero for averages and
                //      = (\bar{x_a}-\bar{x_b})*(\bar{y_a}-\bar{y_b})*na*nb/N
                //      for Reynolds stresses
                NekDouble fac = ((NekDouble)(na * nb)) / ((NekDouble)(na + nb));
                Vmath::Vsub(nq, m_f->m_exp[i]->GetPhys(), 1, fromPhys[i], 1,
                            correction[n], 1);
                Vmath::Vsub(nq, m_f->m_exp[j]->GetPhys(), 1, fromPhys[j], 1,
                            tmp, 1);
                Vmath::Vmul(nq, correction[n], 1, tmp, 1, correction[n], 1);
                Vmath::Smul(nq, fac, correction[n], 1, correction[n], 1);
            }
        }
    }
    // Combine fields
    for (int j = 0; j < nfields; ++j)
    {
        // The new value is: (x_a*na + x_b*nb + correction)/N
        Vmath::Smul(nq, 1.0 * na, m_f->m_exp[j]->GetPhys(), 1,
                    m_f->m_exp[j]->UpdatePhys(), 1);
        Vmath::Svtvp(nq, 1.0 * nb, fromPhys[j], 1, m_f->m_exp[j]->GetPhys(), 1,
                     m_f->m_exp[j]->UpdatePhys(), 1);
        Vmath::Vadd(nq, m_f->m_exp[j]->GetPhys(), 1, correction[j], 1,
                    m_f->m_exp[j]->UpdatePhys(), 1);
        Vmath::Smul(nq, 1.0 / (na + nb), m_f->m_exp[j]->GetPhys(), 1,
                    m_f->m_exp[j]->UpdatePhys(), 1);

        m_f->m_exp[j]->FwdTrans_IterPerExp(m_f->m_exp[j]->GetPhys(),
                                           m_f->m_exp[j]->UpdateCoeffs());
    }

    // Update metadata
    m_f->m_fieldMetaDataMap["NumberOfFieldDumps"] =
        boost::lexical_cast<std::string>(na + nb);
    NekDouble t0      = -1;
    NekDouble finTime = -1;
    if (m_f->m_fieldMetaDataMap.count("InitialTime"))
    {
        string s_t  = m_f->m_fieldMetaDataMap["InitialTime"];
        NekDouble t = atof(s_t.c_str());

        t0 = t;
    }
    if (fromFieldMetaDataMap.count("InitialTime"))
    {
        string s_t  = fromFieldMetaDataMap["InitialTime"];
        NekDouble t = atof(s_t.c_str());

        if (t0 == -1)
        {
            t0 = t;
        }
        else
        {
            t0 = std::min(t0, t);
        }
    }
    if (m_f->m_fieldMetaDataMap.count("FinalTime"))
    {
        string s_t  = m_f->m_fieldMetaDataMap["FinalTime"];
        NekDouble t = atof(s_t.c_str());

        finTime = std::max(t0, t);
    }
    if (fromFieldMetaDataMap.count("FinalTime"))
    {
        string s_t  = fromFieldMetaDataMap["FinalTime"];
        NekDouble t = atof(s_t.c_str());

        finTime = std::max(t0, t);
    }
    if (t0 != -1)
    {
        m_f->m_fieldMetaDataMap["InitialTime"] =
            boost::lexical_cast<std::string>(t0);
    }
    if (finTime != -1)
    {
        m_f->m_fieldMetaDataMap["FinalTime"] =
            boost::lexical_cast<std::string>(finTime);
    }

}

Member Data Documentation

className

ModuleKey Nektar::FieldUtils::ProcessCombineAvg::className

static

Initial value:

=
    GetModuleFactory().RegisterCreatorFunction(
        ModuleKey(eProcessModule, "combineAvg"),
        ProcessCombineAvg::create,
        "combine two fields containing averages (and possibly Reynolds "
        "stresses). Must specify fromfld.")

Definition at line 58 of file ProcessCombineAvg.h.