Nektar::FieldUtils::ProcessVorticity Class Reference

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

#include <ProcessVorticity.h>

Inheritance diagram for Nektar::FieldUtils::ProcessVorticity:

Public Member Functions
	ProcessVorticity (FieldSharedPtr f)
virtual	~ProcessVorticity ()
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

Protected Member Functions
void	GetVelocity (Array< OneD, Array< OneD, NekDouble > > &vel, int strip=0)
Protected Member Functions inherited from Nektar::FieldUtils::Module
	Module ()

Private Attributes
int	m_spacedim

Additional Inherited Members
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 calculates the vorticity and adds it as an extra-field to the output file.

Definition at line 48 of file ProcessVorticity.h.

Constructor & Destructor Documentation

ProcessVorticity()

Nektar::FieldUtils::ProcessVorticity::ProcessVorticity

(

FieldSharedPtr

f

)

Definition at line 58 of file ProcessVorticity.cpp.

                                                   : ProcessModule(f)
{
}

~ProcessVorticity()

Nektar::FieldUtils::ProcessVorticity::~ProcessVorticity ( )

virtual

Definition at line 62 of file ProcessVorticity.cpp.

{
}

Member Function Documentation

create()

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

inlinestatic

Creates an instance of this class.

Definition at line 52 of file ProcessVorticity.h.

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

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

GetModuleDescription()

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

inlinevirtual

Reimplemented from Nektar::FieldUtils::Module.

Definition at line 69 of file ProcessVorticity.h.

    {
        return "Calculating vorticity";
    }

GetModuleName()

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

inlinevirtual

Implements Nektar::FieldUtils::Module.

Definition at line 64 of file ProcessVorticity.h.

    {
        return "ProcessVorticity";
    }

GetModulePriority()

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

inlinevirtual

Implements Nektar::FieldUtils::Module.

Definition at line 74 of file ProcessVorticity.h.

References Nektar::FieldUtils::eModifyExp, and GetVelocity().

    {
        return eModifyExp;
    }

GetVelocity()

void Nektar::FieldUtils::ProcessVorticity::GetVelocity ( Array< OneD, Array< OneD, NekDouble > > &  vel, int  strip = 0  )

protected

Definition at line 220 of file ProcessVorticity.cpp.

References ASSERTL0, Nektar::FieldUtils::Module::m_f, m_spacedim, Vmath::Vcopy(), and Vmath::Vdiv().

Referenced by GetModulePriority(), and Process().

{
    int nfields = m_f->m_variables.size();
    int npoints = m_f->m_exp[0]->GetNpoints();
    if(boost::iequals(m_f->m_variables[0], "u"))
    {
        // IncNavierStokesSolver
        for (int i = 0; i < m_spacedim; ++i)
        {
            vel[i] = Array<OneD, NekDouble>(npoints);
            Vmath::Vcopy(npoints,
                         m_f->m_exp[strip * nfields + i]->GetPhys(), 1,
                         vel[i], 1);
        }
    }
    else if(boost::iequals(m_f->m_variables[0], "rho") &&
            boost::iequals(m_f->m_variables[1], "rhou"))
    {
        // CompressibleFlowSolver
        for (int i = 0; i < m_spacedim; ++i)
        {
            vel[i] = Array<OneD, NekDouble>(npoints);
            Vmath::Vdiv(npoints,
                         m_f->m_exp[strip * nfields + i + 1]->GetPhys(), 1,
                         m_f->m_exp[strip * nfields + 0    ]->GetPhys(), 1,
                         vel[i], 1);
        }
    }
    else
    {
        // Unknown
        ASSERTL0(false, "Could not identify velocity for ProcessVorticity");
    }
}

Process()

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

virtual

Write mesh to output file.

Implements Nektar::FieldUtils::Module.

Definition at line 66 of file ProcessVorticity.cpp.

References ASSERTL0, Nektar::FieldUtils::ProcessMapping::GetMapping(), GetVelocity(), Nektar::FieldUtils::Module::m_f, m_spacedim, Nektar::GlobalMapping::MappingSharedPtr, Vmath::Vcopy(), and Vmath::Vsub().

{
    boost::ignore_unused(vm);

    int i, s;
    int expdim   = m_f->m_graph->GetMeshDimension();
    m_spacedim = expdim;
    if ((m_f->m_numHomogeneousDir) == 1 || (m_f->m_numHomogeneousDir) == 2)
    {
        m_spacedim = 3;
    }
    int nfields = m_f->m_variables.size();
    ASSERTL0(m_spacedim != 1,
             "Error: Vorticity for a 1D problem cannot be computed");
    int addfields = (m_spacedim == 2) ? 1 : 3;

    // Append field names
    if (addfields == 1)
    {
        m_f->m_variables.push_back("W_z");
    }
    else
    {
        m_f->m_variables.push_back("W_x");
        m_f->m_variables.push_back("W_y");
        m_f->m_variables.push_back("W_z");
    }

    // Skip in case of empty partition
    if (m_f->m_exp[0]->GetNumElmts() == 0)
    {
        return;
    }
    int npoints = m_f->m_exp[0]->GetNpoints();
    Array<OneD, Array<OneD, NekDouble> > grad(m_spacedim * m_spacedim);
    Array<OneD, Array<OneD, NekDouble> > outfield(addfields);

    int nstrips;

    m_f->m_session->LoadParameter("Strip_Z", nstrips, 1);

    for (i = 0; i < m_spacedim * m_spacedim; ++i)
    {
        grad[i] = Array<OneD, NekDouble>(npoints);
    }

    for (i = 0; i < addfields; ++i)
    {
        outfield[i] = Array<OneD, NekDouble>(npoints);
    }

    Array<OneD, Array<OneD, NekDouble> > tmp(m_spacedim);
    for (int i = 0; i < m_spacedim; i++)
    {
        tmp[i] = Array<OneD, NekDouble>(npoints);
    }

    vector<MultiRegions::ExpListSharedPtr> Exp(nstrips * addfields);

    // Get mapping
    GlobalMapping::MappingSharedPtr mapping = ProcessMapping::GetMapping(m_f);

    for (s = 0; s < nstrips; ++s) // homogeneous strip varient
    {
        // Get velocity and convert to Cartesian system,
        //      if it is still in transformed system
        Array<OneD, Array<OneD, NekDouble> > vel(m_spacedim);
        GetVelocity(vel, s);
        if (m_f->m_fieldMetaDataMap.count("MappingCartesianVel"))
        {
            if (m_f->m_fieldMetaDataMap["MappingCartesianVel"] == "False")
            {
                // Initialize arrays and copy velocity
                if (m_f->m_exp[0]->GetWaveSpace())
                {
                    for (int i = 0; i < m_spacedim; ++i)
                    {
                        m_f->m_exp[0]->HomogeneousBwdTrans(vel[i], vel[i]);
                    }
                }
                // 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 < m_spacedim; ++i)
                    {
                        m_f->m_exp[0]->HomogeneousFwdTrans(vel[i], vel[i]);
                    }
                }
            }
        }

        // Calculate Gradient & Vorticity
        if (m_spacedim == 2)
        {
            for (i = 0; i < m_spacedim; ++i)
            {
                m_f->m_exp[s * nfields + i]->PhysDeriv(vel[i], tmp[0], tmp[1]);
                mapping->CovarToCartesian(tmp, tmp);
                for (int j = 0; j < m_spacedim; j++)
                {
                    Vmath::Vcopy(npoints, tmp[j], 1, grad[i * m_spacedim + j], 1);
                }
            }
            // W_z = Vx - Uy
            Vmath::Vsub(npoints, grad[1 * m_spacedim + 0], 1,
                        grad[0 * m_spacedim + 1], 1, outfield[0], 1);
        }
        else
        {
            for (i = 0; i < m_spacedim; ++i)
            {
                m_f->m_exp[s * nfields + i]->PhysDeriv(vel[i], tmp[0], tmp[1],
                                                       tmp[2]);
                mapping->CovarToCartesian(tmp, tmp);
                for (int j = 0; j < m_spacedim; j++)
                {
                    Vmath::Vcopy(npoints, tmp[j], 1, grad[i * m_spacedim + j], 1);
                }
            }

            // W_x = Wy - Vz
            Vmath::Vsub(npoints, grad[2 * m_spacedim + 1], 1,
                        grad[1 * m_spacedim + 2], 1, outfield[0], 1);
            // W_y = Uz - Wx
            Vmath::Vsub(npoints, grad[0 * m_spacedim + 2], 1,
                        grad[2 * m_spacedim + 0], 1, outfield[1], 1);
            // W_z = Vx - Uy
            Vmath::Vsub(npoints, grad[1 * m_spacedim + 0], 1,
                        grad[0 * m_spacedim + 1], 1, outfield[2], 1);
        }

        for (i = 0; i < addfields; ++i)
        {
            int n = s * addfields + i;
            Exp[n] =
                m_f->AppendExpList(m_f->m_numHomogeneousDir);
            Vmath::Vcopy(npoints, outfield[i], 1, Exp[n]->UpdatePhys(), 1);
            Exp[n]->FwdTrans_IterPerExp(outfield[i], Exp[n]->UpdateCoeffs());
        }
    }

    for (s = 0; s < nstrips; ++s)
    {
        for (i = 0; i < addfields; ++i)
        {
            m_f->m_exp.insert(
                m_f->m_exp.begin() + s * (nfields + addfields) + nfields + i,
                Exp[s * addfields + i]);
        }
    }
}

Member Data Documentation

className

ModuleKey Nektar::FieldUtils::ProcessVorticity::className

static

Initial value:

=
    GetModuleFactory().RegisterCreatorFunction(
        ModuleKey(eProcessModule, "vorticity"),
        ProcessVorticity::create,
        "Computes vorticity field.")

Definition at line 56 of file ProcessVorticity.h.

m_spacedim

int Nektar::FieldUtils::ProcessVorticity::m_spacedim

private

Definition at line 83 of file ProcessVorticity.h.

Referenced by GetVelocity(), and Process().