SLTSDdtScheme.H

Go to the documentation of this file.

/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | www.openfoam.com
     \\/     M anipulation  |
-------------------------------------------------------------------------------
    Copyright (C) 2011-2016 OpenFOAM Foundation
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Class
    Foam::fv::SLTSDdtScheme
 
Group
    grpFvDdtSchemes
 
Description
    Stabilised local time-step first-order Euler implicit/explicit ddt.
    The time-step is adjusted locally so that an advective equations remains
    diagonally dominant.
 
    This scheme should only be used for steady-state computations
    using transient codes where local time-stepping is preferably to
    under-relaxation for transport consistency reasons.
 
See also
    Foam::fv::CoEulerDdtScheme
 
SourceFiles
    SLTSDdtScheme.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef SLTSDdtScheme_H
#define SLTSDdtScheme_H
 
#include "ddtScheme.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace fv
{
 
/*---------------------------------------------------------------------------*\
                       Class SLTSDdtScheme Declaration
\*---------------------------------------------------------------------------*/
 
template<class Type>
class SLTSDdtScheme
:
    public fv::ddtScheme<Type>
{
    // Private Data
 
        //- Name of the flux field used to calculate the local time-step
        word phiName_;
 
        //- Name of the density field used to obtain the volumetric flux
        //  from the mass flux if required
        word rhoName_;
 
        //- Under-relaxation factor
        scalar alpha_;
 
 
    // Private Member Functions
 
        //- No copy construct
        SLTSDdtScheme(const SLTSDdtScheme&) = delete;
 
        //- No copy assignment
        void operator=(const SLTSDdtScheme&) = delete;
 
        //- Calculate a relaxed diagonal from the given flux field
        void relaxedDiag(scalarField& rD, const surfaceScalarField& phi) const;
 
        //- Return the reciprocal of the stabilised local time-step
        tmp<volScalarField> SLrDeltaT() const;
 
 
public:
 
    //- Runtime type information
    TypeName("SLTS");
 
 
    // Constructors
 
        //- Construct from mesh and Istream
        SLTSDdtScheme(const fvMesh& mesh, Istream& is)
        :
            ddtScheme<Type>(mesh, is),
            phiName_(is),
            rhoName_(is),
            alpha_(readScalar(is))
        {}
 
 
    // Member Functions
 
        //- Return mesh reference
        const fvMesh& mesh() const
        {
            return fv::ddtScheme<Type>::mesh();
        }
 
        tmp<GeometricField<Type, fvPatchField, volMesh>> fvcDdt
        (
            const dimensioned<Type>&
        );
 
        tmp<GeometricField<Type, fvPatchField, volMesh>> fvcDdt
        (
            const GeometricField<Type, fvPatchField, volMesh>&
        );
 
        tmp<GeometricField<Type, fvPatchField, volMesh>> fvcDdt
        (
            const dimensionedScalar&,
            const GeometricField<Type, fvPatchField, volMesh>&
        );
 
        tmp<GeometricField<Type, fvPatchField, volMesh>> fvcDdt
        (
            const volScalarField&,
            const GeometricField<Type, fvPatchField, volMesh>&
        );
 
        tmp<GeometricField<Type, fvPatchField, volMesh>> fvcDdt
        (
            const volScalarField& alpha,
            const volScalarField& rho,
            const GeometricField<Type, fvPatchField, volMesh>& psi
        );
 
        tmp<fvMatrix<Type>> fvmDdt
        (
            const GeometricField<Type, fvPatchField, volMesh>&
        );
 
        tmp<fvMatrix<Type>> fvmDdt
        (
            const dimensionedScalar&,
            const GeometricField<Type, fvPatchField, volMesh>&
        );
 
        tmp<fvMatrix<Type>> fvmDdt
        (
            const volScalarField&,
            const GeometricField<Type, fvPatchField, volMesh>&
        );
 
        tmp<fvMatrix<Type>> fvmDdt
        (
            const volScalarField& alpha,
            const volScalarField& rho,
            const GeometricField<Type, fvPatchField, volMesh>& psi
        );
 
        typedef typename ddtScheme<Type>::fluxFieldType fluxFieldType;
 
        tmp<fluxFieldType> fvcDdtUfCorr
        (
            const GeometricField<Type, fvPatchField, volMesh>& U,
            const GeometricField<Type, fvsPatchField, surfaceMesh>& Uf
        );
 
        tmp<fluxFieldType> fvcDdtPhiCorr
        (
            const GeometricField<Type, fvPatchField, volMesh>& U,
            const fluxFieldType& phi
        );
 
        tmp<fluxFieldType> fvcDdtUfCorr
        (
            const volScalarField& rho,
            const GeometricField<Type, fvPatchField, volMesh>& U,
            const GeometricField<Type, fvsPatchField, surfaceMesh>& Uf
        );
 
        tmp<fluxFieldType> fvcDdtPhiCorr
        (
            const volScalarField& rho,
            const GeometricField<Type, fvPatchField, volMesh>& U,
            const fluxFieldType& phi
        );
 
        tmp<surfaceScalarField> meshPhi
        (
            const GeometricField<Type, fvPatchField, volMesh>&
        );
};
 
 
template<>
tmp<surfaceScalarField> SLTSDdtScheme<scalar>::fvcDdtUfCorr
(
    const GeometricField<scalar, fvPatchField, volMesh>& U,
    const GeometricField<scalar, fvsPatchField, surfaceMesh>& Uf
);
 
template<>
tmp<surfaceScalarField> SLTSDdtScheme<scalar>::fvcDdtPhiCorr
(
    const volScalarField& U,
    const surfaceScalarField& phi
);
 
template<>
tmp<surfaceScalarField> SLTSDdtScheme<scalar>::fvcDdtUfCorr
(
    const volScalarField& rho,
    const volScalarField& U,
    const surfaceScalarField& Uf
);
 
template<>
tmp<surfaceScalarField> SLTSDdtScheme<scalar>::fvcDdtPhiCorr
(
    const volScalarField& rho,
    const volScalarField& U,
    const surfaceScalarField& phi
);
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace fv
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "SLTSDdtScheme.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //