fixedShearStressFvPatchVectorField.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2022 OpenCFD Ltd.
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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.
 
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    for more details.
 
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Class
    Foam::fixedShearStressFvPatchVectorField
 
Group
    grpTurbulenceBoundaryConditions
 
Description
    This boundary condition sets a user-defined shear stress
    constant and uniform across a given patch by using the expression:
 
    \f[
        tau_0 = -\nu_{eff} \frac{dU}{dn}
    \f]
 
Usage
    Example of the boundary condition specification:
    \verbatim
    <patchName>
    {
        // Mandatory entries
        type             fixedShearStress;
        tau              <vector>;
 
        // Inherited entries
        ...
    }
    \endverbatim
 
    where the entries mean:
    \table
      Property  | Description                      | Type | Reqd | Deflt
      type      | Type name: fixedShearStress      | word | yes  | -
      tau       | Shear stress                   | vector | yes  | -
    \endtable
 
    The inherited entries are elaborated in:
      - \link fixedValueFvPatchFields.H \endlink
 
SourceFiles
    fixedShearStressFvPatchVectorField.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef fixedShearStressFvPatchVectorField_H
#define fixedShearStressFvPatchVectorField_H
 
#include "fvPatchFields.H"
#include "fixedValueFvPatchFields.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
            Class fixedShearStressFvPatchVectorField Declaration
\*---------------------------------------------------------------------------*/
 
class fixedShearStressFvPatchVectorField
:
    public fixedValueFvPatchVectorField
{
    // Private Data
 
        //- Constant shear stress
        const vector tau0_;
 
 
public:
 
    //- Runtime type information
    TypeName("fixedShearStress");
 
 
    // Constructors
 
        //- Construct from patch and internal field
        fixedShearStressFvPatchVectorField
        (
            const fvPatch&,
            const DimensionedField<vector, volMesh>&
        );
 
        //- Construct from patch, internal field and dictionary
        fixedShearStressFvPatchVectorField
        (
            const fvPatch&,
            const DimensionedField<vector, volMesh>&,
            const dictionary&
        );
 
        //- Construct by mapping given
        fixedShearStressFvPatchVectorField
        (
            const fixedShearStressFvPatchVectorField&,
            const fvPatch&,
            const DimensionedField<vector, volMesh>&,
            const fvPatchFieldMapper&
        );
 
        //- Construct as copy
        fixedShearStressFvPatchVectorField
        (
            const fixedShearStressFvPatchVectorField&
        );
 
        //- Construct as copy setting internal field reference
        fixedShearStressFvPatchVectorField
        (
            const fixedShearStressFvPatchVectorField&,
            const DimensionedField<vector, volMesh>&
        );
 
        //- Return a clone
        virtual tmp<fvPatchField<vector>> clone() const
        {
            return fvPatchField<vector>::Clone(*this);
        }
 
        //- Clone with an internal field reference
        virtual tmp<fvPatchField<vector>> clone
        (
            const DimensionedField<vector, volMesh>& iF
        ) const
        {
            return fvPatchField<vector>::Clone(*this, iF);
        }
 
 
    // Member Functions
 
        // Evaluation
 
            //- Update the coefficients associated with the patch field
            virtual void updateCoeffs();
 
 
        // I-O
 
            //- Write
            virtual void write(Ostream&) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //