pLaplacianMotionSolver.H

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/*---------------------------------------------------------------------------*\
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-------------------------------------------------------------------------------
    Copyright (C) 2021-2023 PCOpt/NTUA
    Copyright (C) 2021-2023 FOSS GP
-------------------------------------------------------------------------------
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::pLaplacianMotionSolver
 
Description
    Similar to velocityLaplacian but with a variable diffusivity, based
    on the gradient of the displacement.
    The boundary displacement is set as a boundary condition
    on pointMotionU; the latter is generated automatically if not found.
 
SourceFiles
    pLaplacianMotionSolver.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef pLaplacianMotionSolver_H
#define pLaplacianMotionSolver_H
 
#include "velocityMotionSolver.H"
#include "fvMotionSolver.H"
#include "volPointInterpolation.H"
#include "polyMesh.H"
#include "pointMesh.H"
#include "pointPatchField.H"
#include "pointPatchFieldsFwd.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward class declarations
class motionInterpolation;
class mapPolyMesh;
 
/*---------------------------------------------------------------------------*\
                    Class pLaplacianMotionSolver Declaration
\*---------------------------------------------------------------------------*/
 
class pLaplacianMotionSolver
:
    public motionSolver,
    public fvMotionSolver
{
protected:
 
    // Protected data
 
        // Use a fixedValue boundary condition for the moving patches?  When
        // using this motionSolver in an optimisation context, we usually go
        // from point movement to face movement, solve the grid dispalcement
        // PDE and then interpolate the movement back to the points. If the
        // boundary conditions of pointMotionU are fixedValue, the initial
        // values will be retained, otherwise they will be overwritten by the
        // face-to-point interpolation. The latter is usually beneficial for
        // the resulting mesh quality but does not give us the exact geometry.
        bool useFixedValuePointMotionUBCs_;
 
        mutable pointVectorField pointMotionU_;
        volVectorField cellMotionU_;
 
        //- Interpolation used to transfer cell displacement to the points
        autoPtr<motionInterpolation> interpolationPtr_;
 
        //- Number of pLaplacian iterations per solution step
        label nIters_;
 
        //- Residual threshold
        scalar tolerance_;
 
        //- Residual threshold for intermediate exponents
        scalar toleranceIntermediate_;
 
        //- Exponent defining the order or the p-Laplacian
        label exponent_;
 
 
private:
 
 
    // Private Member Functions
 
        //- No copy construct
        pLaplacianMotionSolver(const pLaplacianMotionSolver&) = delete;
 
        //- No copy assignment
        void operator=(const pLaplacianMotionSolver&) = delete;
 
public:
 
    //- Runtime type information
    TypeName("pLaplacianMotionSolver");
 
 
    // Constructors
 
        //- Construct from mesh and dictionary
        pLaplacianMotionSolver
        (
            const polyMesh& mesh,
            const IOdictionary& dict
        );
 
 
    //- Destructor
    virtual ~pLaplacianMotionSolver() = default;
 
 
    // Member Functions
 
        //- Set boundary conditions of cellMotionU based on pointMotionU.
        //  Avoiding the use of the cellMotionFvPatchField bc
        //  due to the use of the registry in order to grab pointMotionU, which
        //  may give problems if multiple objects of this class are constructed
        //  at the same time
        void setBoundaryConditions();
 
        //- Get const and non-const references to pointMotionU
        inline pointVectorField& pointMotionU();
        inline const pointVectorField& pointMotionU() const;
 
        //- Get const and non-const references to cellMotionU
        inline volVectorField& cellMotionU();
        inline const volVectorField& cellMotionU() const;
 
        //- Return point location obtained from the current motion field
        virtual tmp<pointField> curPoints() const;
 
        //- Solve for motion
        virtual void solve();
 
        //- Update local data for geometry changes
        virtual void movePoints(const pointField&);
 
        //- Update the mesh corresponding to given map
        virtual void updateMesh(const mapPolyMesh&);
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "pLaplacianMotionSolverI.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //