Nektar::PressureMachTemperatureBC Class Reference

Boundary condition in terms of pressure, Mach number and temperature. P should be defined in the "rho" entry, T in the "E" entry and the Mach number in each direction in the corresponding momentum variable. This state is converted to conserved variables and a Dirichlet condition is applied. More...

#include <PressureMachTemperatureBC.h>

Inheritance diagram for Nektar::PressureMachTemperatureBC:

Static Public Member Functions
static CFSBndCondSharedPtr	create (const LibUtilities::SessionReaderSharedPtr &pSession, const Array< OneD, MultiRegions::ExpListSharedPtr > &pFields, const Array< OneD, Array< OneD, NekDouble > > &pTraceNormals, const Array< OneD, Array< OneD, NekDouble > > &pGridVelocity, const int pSpaceDim, const int bcRegion, const int cnt)
	Creates an instance of this class.

Static Public Attributes
static std::string	className
	Name of the class.

Protected Member Functions
void	v_Apply (Array< OneD, Array< OneD, NekDouble > > &Fwd, Array< OneD, Array< OneD, NekDouble > > &physarray, const NekDouble &time) override
Protected Member Functions inherited from Nektar::CFSBndCond
	CFSBndCond (const LibUtilities::SessionReaderSharedPtr &pSession, const Array< OneD, MultiRegions::ExpListSharedPtr > &pFields, const Array< OneD, Array< OneD, NekDouble > > &pTraceNormals, const Array< OneD, Array< OneD, NekDouble > > &pGridVelocity, const int pSpaceDim, const int bcRegion, const int cnt)
	Constructor.
virtual	~CFSBndCond ()=default
virtual void	v_ApplyBwdWeight ()

Private Member Functions
	PressureMachTemperatureBC (const LibUtilities::SessionReaderSharedPtr &pSession, const Array< OneD, MultiRegions::ExpListSharedPtr > &pFields, const Array< OneD, Array< OneD, NekDouble > > &pTraceNormals, const Array< OneD, Array< OneD, NekDouble > > &pGridVelocity, const int pSpaceDim, const int bcRegion, const int cnt)
	~PressureMachTemperatureBC (void) override=default

Private Attributes
Array< OneD, Array< OneD, NekDouble > >	m_bcStorage

Friends
class	MemoryManager< PressureMachTemperatureBC >

Additional Inherited Members
Public Member Functions inherited from Nektar::CFSBndCond
void	Apply (Array< OneD, Array< OneD, NekDouble > > &Fwd, Array< OneD, Array< OneD, NekDouble > > &physarray, const NekDouble &time=0)
	Apply the boundary condition.
void	ApplyBwdWeight ()
	Apply the Weight of boundary condition.
Protected Attributes inherited from Nektar::CFSBndCond
LibUtilities::SessionReaderSharedPtr	m_session
	Session reader.
Array< OneD, MultiRegions::ExpListSharedPtr >	m_fields
	Array of fields.
Array< OneD, Array< OneD, NekDouble > >	m_traceNormals
	Trace normals.
Array< OneD, Array< OneD, NekDouble > >	m_gridVelocityTrace
	Grid Velocity.
int	m_spacedim
	Space dimension.
VariableConverterSharedPtr	m_varConv
	Auxiliary object to convert variables.
NekDouble	m_diffusionAveWeight
	Weight for average calculation of diffusion term.
NekDouble	m_gamma
	Parameters of the flow.
NekDouble	m_rhoInf
NekDouble	m_pInf
NekDouble	m_pOut
Array< OneD, NekDouble >	m_velInf
NekDouble	m_angVel
int	m_bcRegion
	Id of the boundary region.
int	m_offset
	Offset.

Detailed Description

Boundary condition in terms of pressure, Mach number and temperature. P should be defined in the "rho" entry, T in the "E" entry and the Mach number in each direction in the corresponding momentum variable. This state is converted to conserved variables and a Dirichlet condition is applied.

Definition at line 51 of file PressureMachTemperatureBC.h.

Constructor & Destructor Documentation

PressureMachTemperatureBC()

Nektar::PressureMachTemperatureBC::PressureMachTemperatureBC ( const LibUtilities::SessionReaderSharedPtr &  pSession, const Array< OneD, MultiRegions::ExpListSharedPtr > &  pFields, const Array< OneD, Array< OneD, NekDouble > > &  pTraceNormals, const Array< OneD, Array< OneD, NekDouble > > &  pGridVelocity, const int  pSpaceDim, const int  bcRegion, const int  cnt  )

private

Definition at line 46 of file PressureMachTemperatureBC.cpp.

    : CFSBndCond(pSession, pFields, pTraceNormals, pGridVelocity, pSpaceDim,
                 bcRegion, cnt)
{
    int nvariables = m_fields.size();
    int numBCPts =
        m_fields[0]->GetBndCondExpansions()[m_bcRegion]->GetNpoints();
 
    // Array for storing conserved variables on the boundary
    m_bcStorage = Array<OneD, Array<OneD, NekDouble>>(nvariables);
    for (int i = 0; i < nvariables; ++i)
    {
        m_bcStorage[i] = Array<OneD, NekDouble>(numBCPts, 0.0);
    }
 
    // We assume that the pressure is given in entry [0] of
    //   the BC ("rho" position) and the temperature in entry m_spacedim+1
    //   ("E" position)
    const Array<OneD, const NekDouble> pressure =
        m_fields[0]->GetBndCondExpansions()[m_bcRegion]->GetPhys();
    const Array<OneD, const NekDouble> temperature =
        m_fields[m_spacedim + 1]->GetBndCondExpansions()[m_bcRegion]->GetPhys();
 
    // Calculate density
    m_varConv->GetRhoFromPT(pressure, temperature, m_bcStorage[0]);
    // Calculate the internal energy times density
    m_varConv->GetEFromRhoP(m_bcStorage[0], pressure,
                            m_bcStorage[m_spacedim + 1]);
    Vmath::Vmul(numBCPts, m_bcStorage[m_spacedim + 1], 1, m_bcStorage[0], 1,
                m_bcStorage[m_spacedim + 1], 1);
    // We can now obtain the sound speed at this (rho,e) condition
    Array<OneD, NekDouble> soundSpeed(numBCPts);
    m_varConv->GetSoundSpeed(m_bcStorage, soundSpeed);
 
    // Now update momentum and add kinetic energy to E
    Array<OneD, NekDouble> tmp(numBCPts);
    for (int i = 0; i < m_spacedim; ++i)
    {
        // tmp = velocity in i direction
        Vmath::Vmul(
            numBCPts,
            m_fields[i + 1]->GetBndCondExpansions()[m_bcRegion]->GetPhys(), 1,
            soundSpeed, 1, tmp, 1);
        // rho*u
        Vmath::Vmul(numBCPts, m_bcStorage[0], 1, tmp, 1, m_bcStorage[i + 1], 1);
        // tmp = 0.5 * rho *(rhou) in vel
        Vmath::Vmul(numBCPts, m_bcStorage[i + 1], 1, tmp, 1, tmp, 1);
        Vmath::Smul(numBCPts, 0.5, tmp, 1, tmp, 1);
        // Add to E
        Vmath::Vadd(numBCPts, m_bcStorage[m_spacedim + 1], 1, tmp, 1,
                    m_bcStorage[m_spacedim + 1], 1);
    }
 
    // Copy to boundary condition
    for (int i = 0; i < nvariables; ++i)
    {
        Vmath::Vcopy(
            numBCPts, m_bcStorage[i], 1,
            m_fields[i]->GetBndCondExpansions()[m_bcRegion]->UpdatePhys(), 1);
    }
}

References Nektar::CFSBndCond::m_bcRegion, m_bcStorage, Nektar::CFSBndCond::m_fields, Nektar::CFSBndCond::m_spacedim, Nektar::CFSBndCond::m_varConv, Vmath::Smul(), Vmath::Vadd(), Vmath::Vcopy(), and Vmath::Vmul().

~PressureMachTemperatureBC()

Nektar::PressureMachTemperatureBC::~PressureMachTemperatureBC ( void  )

overrideprivatedefault

Member Function Documentation

create()

static CFSBndCondSharedPtr Nektar::PressureMachTemperatureBC::create ( const LibUtilities::SessionReaderSharedPtr &  pSession, const Array< OneD, MultiRegions::ExpListSharedPtr > &  pFields, const Array< OneD, Array< OneD, NekDouble > > &  pTraceNormals, const Array< OneD, Array< OneD, NekDouble > > &  pGridVelocity, const int  pSpaceDim, const int  bcRegion, const int  cnt  )

inlinestatic

Creates an instance of this class.

Definition at line 57 of file PressureMachTemperatureBC.h.

    {
        CFSBndCondSharedPtr p =
            MemoryManager<PressureMachTemperatureBC>::AllocateSharedPtr(
                pSession, pFields, pTraceNormals, pGridVelocity, pSpaceDim,
                bcRegion, cnt);
        return p;
    }

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

v_Apply()

void Nektar::PressureMachTemperatureBC::v_Apply ( Array< OneD, Array< OneD, NekDouble > > &  Fwd, Array< OneD, Array< OneD, NekDouble > > &  physarray, const NekDouble &  time  )

overrideprotectedvirtual

Implements Nektar::CFSBndCond.

Definition at line 113 of file PressureMachTemperatureBC.cpp.

{
    int nvariables = m_fields.size();
    int numBCPts =
        m_fields[0]->GetBndCondExpansions()[m_bcRegion]->GetNpoints();
    // Copy conserved variables to boundary condition
    for (int i = 0; i < nvariables; ++i)
    {
        Vmath::Vcopy(
            numBCPts, m_bcStorage[i], 1,
            m_fields[i]->GetBndCondExpansions()[m_bcRegion]->UpdatePhys(), 1);
    }
}

References Nektar::CFSBndCond::m_bcRegion, m_bcStorage, Nektar::CFSBndCond::m_fields, and Vmath::Vcopy().

Friends And Related Symbol Documentation

MemoryManager< PressureMachTemperatureBC >

friend class MemoryManager< PressureMachTemperatureBC >

friend

Definition at line 1 of file PressureMachTemperatureBC.h.

Member Data Documentation

className

std::string Nektar::PressureMachTemperatureBC::className

static

Initial value:

=
    GetCFSBndCondFactory().RegisterCreatorFunction(
        "PressureMachTemperature", PressureMachTemperatureBC::create,
        "BC prescribed in terms of p, Ma and T.")

Name of the class.

Definition at line 72 of file PressureMachTemperatureBC.h.

m_bcStorage

Array<OneD, Array<OneD, NekDouble> > Nektar::PressureMachTemperatureBC::m_bcStorage

private

Definition at line 90 of file PressureMachTemperatureBC.h.

Referenced by PressureMachTemperatureBC(), and v_Apply().