KirchhoffShell.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2019-2021 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.

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Class
    Foam::regionFaModels::KirchhoffShell

Description
    Vibration-shell finite-area model.

Usage
    Example of the boundary condition specification:
    \verbatim
    <patchName>
    {
        // Mandatory entries
        vibrationShellModel   KirchhoffShell;
        f0                    <scalar>;
        f1                    <scalar>;
        f2                    <scalar>;

        // Inherited entries
        ...
        nNonOrthCorr          <int>;    // read from another dict
        nSubCycles            <int>;
    }
    \endverbatim

    where the entries mean:
    \table
      Property   | Description                         | Type  | Reqd | Deflt
      vibrationShellModel | Type name: KirchhoffShell  | word  | yes  | -
      f0         | Damping coefficient [1/s]           | scalar | yes | -
      f1         | Damping coefficient [1/s]           | scalar | yes | -
      f2         | Damping coefficient [1/s]           | scalar | yes | -
    \endtable

    The inherited entries are elaborated in:
      - \link vibrationShellModel.H \endlink

SourceFiles
    KirchhoffShell.C

\*---------------------------------------------------------------------------*/

#ifndef Foam_regionModels_KirchhoffShell_H
#define Foam_regionModels_KirchhoffShell_H

#include "volFieldsFwd.H"
#include "vibrationShellModel.H"
#include "faCFD.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{
namespace regionModels
{

/*---------------------------------------------------------------------------*\
                        Class KirchhoffShell Declaration
\*---------------------------------------------------------------------------*/

class KirchhoffShell
:
    public vibrationShellModel
{
    // Private Data

        // Source term fields

        //- External surface source [Pa]
        const areaScalarField ps_;

        //- Thickness [m]
        areaScalarField h_;

        //- Laplace of the displacement
        areaScalarField laplaceW_;

        //- Laplace of the Laplace for the displacement
        areaScalarField laplace2W_;

        //- Cache w.oldTime() in sub-cycling
        areaScalarField w0_;

        //- Cache w.oldTime.oldTime() in sub-cycling
        areaScalarField w00_;

        //- Cache laplaceW.oldTime() in sub-cycling
        areaScalarField laplaceW0_;

        //- Cache laplace2.oldTime() in sub-cycling
        areaScalarField laplace2W0_;


        // Solution parameters

        //- Damping coefficients [1/s]
        const dimensionedScalar f0_;
        const dimensionedScalar f1_;
        const dimensionedScalar f2_;

        //- Number of non orthogonal correctors
        label nNonOrthCorr_;

        //- Sub cycles
        label nSubCycles_;


    // Private Member Functions

        //- Initialise Kirchhoff shell model
        bool init(const dictionary& dict);

        //- Solve energy equation
        void solveDisplacement();


public:

    //- Runtime type information
    TypeName("KirchhoffShell");


    // Constructors

        //- Construct from components and dict
        KirchhoffShell
        (
            const word& modelType,
            const fvMesh& mesh,
            const dictionary& dict
        );

        //- No copy construct
        KirchhoffShell(const KirchhoffShell&) = delete;

        //- No copy assignment
        void operator=(const KirchhoffShell&) = delete;


    //- Destructor
    virtual ~KirchhoffShell() = default;


    // Member Functions

        // Fields

            //- Return stiffness
            const tmp<areaScalarField> D() const;

            //- Return density [Kg/m3]
            const tmp<areaScalarField> rho() const;


        // Evolution

            //- Pre-evolve  thermal baffle
            virtual void preEvolveRegion();

            //- Evolve the thermal baffle
            virtual void evolveRegion();


       // IO

            //- Provide some feedback
            virtual void info();
};


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

} // End namespace regionModels
} // End namespace Foam

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //


#endif

// ************************************************************************* //