Helmholtz.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2021-2023 PCOpt/NTUA
    Copyright (C) 2021-2023 FOSS GP
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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
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    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::Helmholtz
 
Description
    A regulatisation PDE based on a Helmholtz filter
 
 
SourceFiles
    Helmholtz.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef Helmholtz_H
#define Helmholtz_H
 
#include "regularisationPDE.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                          Class Helmholtz Declaration
\*---------------------------------------------------------------------------*/
 
class Helmholtz
:
    public regularisationPDE
{
 
private:
 
    // Private Member Functions
 
        //- No copy construct
        Helmholtz(const Helmholtz&) = delete;
 
        //- No copy assignment
        void operator=(const Helmholtz&) = delete;
 
 
protected:
 
    // Protected Data
 
        //- Solve the regularisationPDE only on a subset mesh made of the
        //- active cell zones
        bool solveOnActiveCells_;
 
        //- Fixed value at wall boundaries. Defaults to 1
        scalar wallValue_;
 
 
    // Protected Member Functions
 
        //- Solve the regulatisation equation
        //  The mesh used is the one of aTilda
        void solveEqn
        (
            const volScalarField& aTilda,
            const scalarField& source,
            scalarField& result,
            const bool isTopoField,
            const regularisationRadius& radius,
            const scalar minSetValue = Zero,
            const bool fixATildaValues = true
        );
 
 
public:
 
    //- Runtime type information
    TypeName("Helmholtz");
 
 
    // Constructors
 
        //- Construct from components
        Helmholtz
        (
            const fvMesh& mesh,
            const dictionary& dict,
            const topOZones& zones
        );
 
 
    //- Destructor
    virtual ~Helmholtz() = default;
 
 
    // Member Functions
 
        //- Regularise field (or sensitivities) using a Laplace PDE
        virtual void regularise
        (
            const volScalarField& aTilda,
            const scalarField& source,
            scalarField& result,
            const bool isTopoField,
            const regularisationRadius& radius,
            const scalar minSetValue = Zero,
            const bool fixATildaValues = true
        );
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //