LRRDiffStress Class Reference

Differential SGS Stress Equation Model for incompressible flows. More...

#include <incompressibleLESModels/LRRDiffStress.H>

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Detailed Description

Differential SGS Stress Equation Model for incompressible flows.

The DSEM uses a model version of the full balance equation for the SGS stress tensor to simulate the behaviour of B, hence,

d/dt(B) + div(U*B) - div(nuSgs*grad(B))
=
P - c1*e/k*B - 0.667*(1 - c1)*e*I - c2*(P - 0.333*trP*I)
where
k = 0.5*trB,
epsilon = ce*k^3/2/delta
epsilon/k = ce*k^1/2/delta
P = -(B'L + L'B)
nuEff = ck*sqrt(k)*delta + nu

This version from Launder, Rece & Rodi 1975

Source files

• src/turbulenceModels/incompressible/LES/LRRDiffStress/LRRDiffStress.H
• src/turbulenceModels/incompressible/LES/LRRDiffStress/LRRDiffStress.C

Definition at line 69 of file LRRDiffStress.H.

Inheritance diagram for LRRDiffStress:

Collaboration diagram for LRRDiffStress:

List of all members.

Public Member Functions
	TypeName ("LRRDiffStress")
	Runtime type information.
	LRRDiffStress (const volVectorField &U, const surfaceScalarField &phi, transportModel &transport)
	Construct from components.
virtual	~LRRDiffStress ()
	Destructor.
tmp< volScalarField >	DBEff () const
	Return the effective diffusivity for B.
virtual void	correct (const tmp< volTensorField > &gradU)
	Correct Eddy-Viscosity and related properties.
virtual bool	read ()
	Read LESProperties dictionary.

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Constructor & Destructor Documentation

LRRDiffStress	(	const volVectorField &	U,
		const surfaceScalarField &	phi,
		transportModel &	transport
	)

Construct from components.

Definition at line 55 of file LRRDiffStress.C.

References Foam::tr().

virtual ~LRRDiffStress

(

)

[inline, virtual]

Destructor.

Definition at line 107 of file LRRDiffStress.H.

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Member Function Documentation

TypeName

(

"LRRDiffStress"

)

Runtime type information.

tmp<volScalarField> DBEff

(

)

const [inline]

Return the effective diffusivity for B.

Definition at line 114 of file LRRDiffStress.H.

References incompressible::turbulenceModel::nu(), and GenSGSStress::nuSgs_.

Referenced by LRRDiffStress::correct().

void correct

(

const tmp< volTensorField > &

gradU  )

[virtual]

Correct Eddy-Viscosity and related properties.

Reimplemented from incompressible::LESModel.

Definition at line 100 of file LRRDiffStress.C.

References GenSGSStress::B_, Foam::bound(), Foam::component(), GeometricField< Type, PatchField, GeoMesh >::component(), incompressible::LESModel::correct(), LRRDiffStress::DBEff(), Foam::fvm::ddt(), incompressible::LESModel::delta(), Foam::fvm::div(), forAll, Foam::I, incompressible::LESModel::k0(), Foam::fvm::laplacian(), Foam::magSqr(), Foam::max(), incompressible::LESModel::nuEff(), incompressible::turbulenceModel::phi(), Foam::pow(), fvMatrix< Type >::relax(), fvMatrix< Type >::solve(), Foam::fvm::Sp(), Foam::symm(), Foam::tr(), Foam::twoSymm(), SymmTensor< Cmpt >::XX, SymmTensor< Cmpt >::YY, and SymmTensor< Cmpt >::ZZ.

bool read

(

)

[virtual]

Read LESProperties dictionary.

Reimplemented from GenSGSStress.

Definition at line 148 of file LRRDiffStress.C.

References incompressible::LESModel::coeffDict(), GenSGSStress::read(), and dimensioned< Type >::readIfPresent().

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The documentation for this class was generated from the following files:

• src/turbulenceModels/incompressible/LES/LRRDiffStress/LRRDiffStress.H
• src/turbulenceModels/incompressible/LES/LRRDiffStress/LRRDiffStress.C