KirchhoffShell.H

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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::regionModels::KirchhoffShell (Foam::regionFaModels)
 
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 | -
      h          | Name of thickness field         | word  | no   | h (suffix)
      ps         | Name of pressure field          | word  | no   | ps (suffix)
    \endtable
 
    Fields/variables used:
    \table
      Property  | Description               | Type  | Deflt
      h         | Thickness                 | shell | h (suffix)
      ps        | Pressure on shell         | shell | ps (suffix)
    \endtable
 
    Naming changes from 2056 and earlier:
    \table
      Keyword  | Description               | Keyword (old) | Deflt (old)
      h        | Thickness (shell)         | -   | "h_" + regionName
      ps       | Pressure (shell)          | -   | "ps_" + regionName
    \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
 
        //- Shell thickness [m]
        areaScalarField h_;
 
        //- External surface source [Pa]
        const areaScalarField ps_;
 
        //- 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
 
// ************************************************************************* //