Nektar::NonSmoothShockCapture Class Reference

Non Smooth artificial diffusion for shock capture for compressible flow problems. More...

#include <NonSmoothShockCapture.h>

Inheritance diagram for Nektar::NonSmoothShockCapture:

Static Public Member Functions
static ArtificialDiffusionSharedPtr	create (const LibUtilities::SessionReaderSharedPtr &pSession, const Array< OneD, MultiRegions::ExpListSharedPtr > &pFields, const int spacedim)
	Creates an instance of this class.

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

Protected Member Functions
void	v_GetArtificialViscosity (const Array< OneD, Array< OneD, NekDouble > > &physfield, Array< OneD, NekDouble > &mu) override
Protected Member Functions inherited from Nektar::ArtificialDiffusion
	ArtificialDiffusion (const LibUtilities::SessionReaderSharedPtr &pSession, const Array< OneD, MultiRegions::ExpListSharedPtr > &pFields, const int spacedim)
	Constructor.
virtual	~ArtificialDiffusion ()=default
virtual void	v_DoArtificialDiffusion (const Array< OneD, const Array< OneD, NekDouble > > &inarray, Array< OneD, Array< OneD, NekDouble > > &outarray)
virtual void	v_DoArtificialDiffusionCoeff (const Array< OneD, const Array< OneD, NekDouble > > &inarray, Array< OneD, Array< OneD, NekDouble > > &outarray)
void	GetFluxVector (const Array< OneD, Array< OneD, NekDouble > > &inarray, const Array< OneD, Array< OneD, Array< OneD, NekDouble > > > &qfield, Array< OneD, Array< OneD, Array< OneD, NekDouble > > > &viscousTensor)
	Return the flux vector for the artificial viscosity operator.

Private Member Functions
	NonSmoothShockCapture (const LibUtilities::SessionReaderSharedPtr &pSession, const Array< OneD, MultiRegions::ExpListSharedPtr > &pFields, const int spacedim)
	~NonSmoothShockCapture (void) override=default

Private Attributes
int	m_offset
	Parameters.

Friends
class	MemoryManager< NonSmoothShockCapture >

Additional Inherited Members
Public Member Functions inherited from Nektar::ArtificialDiffusion
void	DoArtificialDiffusion (const Array< OneD, const Array< OneD, NekDouble > > &inarray, Array< OneD, Array< OneD, NekDouble > > &outarray)
	Apply the artificial diffusion.
void	DoArtificialDiffusionCoeff (const Array< OneD, const Array< OneD, NekDouble > > &inarray, Array< OneD, Array< OneD, NekDouble > > &outarray)
	Apply the artificial diffusion the outarray is in coeff space.
void	GetArtificialViscosity (const Array< OneD, Array< OneD, NekDouble > > &physfield, Array< OneD, NekDouble > &mu)
	Calculate the artificial viscosity.
Protected Attributes inherited from Nektar::ArtificialDiffusion
LibUtilities::SessionReaderSharedPtr	m_session
	Session reader.
Array< OneD, MultiRegions::ExpListSharedPtr >	m_fields
	Array of fields.
VariableConverterSharedPtr	m_varConv
	Auxiliary object to convert variables.
SolverUtils::DiffusionSharedPtr	m_diffusion
	LDG Diffusion operator.
NekDouble	m_mu0
	Constant scaling.

Detailed Description

Non Smooth artificial diffusion for shock capture for compressible flow problems.

Definition at line 47 of file NonSmoothShockCapture.h.

Constructor & Destructor Documentation

NonSmoothShockCapture()

Nektar::NonSmoothShockCapture::NonSmoothShockCapture ( const LibUtilities::SessionReaderSharedPtr &  pSession, const Array< OneD, MultiRegions::ExpListSharedPtr > &  pFields, const int  spacedim  )

private

Definition at line 45 of file NonSmoothShockCapture.cpp.

    : ArtificialDiffusion(pSession, pFields, spacedim)
{
    m_session->LoadParameter("SensorOffset", m_offset, 1);
 
    // init h/p
    m_varConv->SetElmtMinHP(m_fields);
}

References Nektar::ArtificialDiffusion::m_fields, m_offset, Nektar::ArtificialDiffusion::m_session, and Nektar::ArtificialDiffusion::m_varConv.

~NonSmoothShockCapture()

Nektar::NonSmoothShockCapture::~NonSmoothShockCapture ( void  )

overrideprivatedefault

Member Function Documentation

create()

static ArtificialDiffusionSharedPtr Nektar::NonSmoothShockCapture::create ( const LibUtilities::SessionReaderSharedPtr &  pSession, const Array< OneD, MultiRegions::ExpListSharedPtr > &  pFields, const int  spacedim  )

inlinestatic

Creates an instance of this class.

Definition at line 53 of file NonSmoothShockCapture.h.

    {
        ArtificialDiffusionSharedPtr p =
            MemoryManager<NonSmoothShockCapture>::AllocateSharedPtr(
                pSession, pFields, spacedim);
        return p;
    }

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

v_GetArtificialViscosity()

void Nektar::NonSmoothShockCapture::v_GetArtificialViscosity ( const Array< OneD, Array< OneD, NekDouble > > &  physfield, Array< OneD, NekDouble > &  mu  )

overrideprotectedvirtual

Implements Nektar::ArtificialDiffusion.

Definition at line 60 of file NonSmoothShockCapture.cpp.

{
    int nPts      = m_fields[0]->GetTotPoints();
    int nElements = m_fields[0]->GetExpSize();
 
    // Determine the maximum wavespeed
    Array<OneD, NekDouble> Lambda(nPts, 0.0);
    Array<OneD, NekDouble> soundspeed(nPts, 0.0);
    Array<OneD, NekDouble> absVelocity(nPts, 0.0);
    m_varConv->GetSoundSpeed(physfield, soundspeed);
    m_varConv->GetAbsoluteVelocity(physfield, absVelocity);
    Vmath::Vadd(nPts, absVelocity, 1, soundspeed, 1, Lambda, 1);
 
    // Compute sensor based on rho
    Array<OneD, NekDouble> Sensor(nPts, 0.0);
    m_varConv->GetSensor(m_fields[0], physfield, Sensor, mu, m_offset);
 
    // Scale AV
    Array<OneD, NekDouble> tmp;
    for (int e = 0; e < nElements; e++)
    {
        int physOffset  = m_fields[0]->GetPhys_Offset(e);
        int nElmtPoints = m_fields[0]->GetExp(e)->GetTotPoints();
 
        // Get max wavespeed per element
        NekDouble LambdaElmt = 0.0;
        LambdaElmt = Vmath::Vmax(nElmtPoints, tmp = Lambda + physOffset, 1);
 
        // Scale viscosity by the maximum wave speed and h/p
        LambdaElmt *= m_mu0 * m_varConv->GetElmtMinHP()[e];
        Vmath::Smul(nElmtPoints, LambdaElmt, tmp = mu + physOffset, 1,
                    tmp = mu + physOffset, 1);
    }
}

References Nektar::ArtificialDiffusion::m_fields, Nektar::ArtificialDiffusion::m_mu0, m_offset, Nektar::ArtificialDiffusion::m_varConv, Vmath::Smul(), Vmath::Vadd(), and Vmath::Vmax().

Friends And Related Symbol Documentation

MemoryManager< NonSmoothShockCapture >

friend class MemoryManager< NonSmoothShockCapture >

friend

Definition at line 1 of file NonSmoothShockCapture.h.

Member Data Documentation

className

std::string Nektar::NonSmoothShockCapture::className

static

Initial value:

=
    GetArtificialDiffusionFactory().RegisterCreatorFunction(
        "NonSmooth", NonSmoothShockCapture::create,
        "NonSmooth artificial diffusion for shock capture.")

Name of the class.

Definition at line 65 of file NonSmoothShockCapture.h.

m_offset

int Nektar::NonSmoothShockCapture::m_offset

private

Parameters.

Definition at line 81 of file NonSmoothShockCapture.h.

Referenced by NonSmoothShockCapture(), and v_GetArtificialViscosity().