alphaContactAngleTwoPhaseFvPatchScalarField.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2019 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::alphaContactAngleTwoPhaseFvPatchScalarField
 
Group
    grpWallBoundaryConditions grpGenericBoundaryConditions
 
Description
    Abstract base class for two-phase alphaContactAngle boundary conditions.
 
    Derived classes must implement the theta() function which returns the
    wall contact angle field.
 
    The essential entry "limit" controls the gradient of alpha1 on the wall:
      - none - Calculate the gradient from the contact-angle without limiter
      - gradient - Limit the wall-gradient such that alpha1 remains bounded
        on the wall
      - alpha - Bound the calculated alpha1 on the wall
      - zeroGradient - Set the gradient of alpha1 to 0 on the wall, i.e.
        reproduce previous behaviour, the pressure BCs can be left as before.
 
    Note that if any of the first three options are used the boundary condition
    on \c p_rgh must set to guarantee that the flux is corrected to be zero at
    the wall e.g.:
 
    \verbatim
    <patchName>
    {
        type            alphaContactAngle;
        limit           none;
    }
    \endverbatim
 
SourceFiles
    alphaContactAngleTwoPhaseFvPatchScalarField.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef alphaContactAngleTwoPhaseFvPatchScalarField_H
#define alphaContactAngleTwoPhaseFvPatchScalarField_H
 
#include "fixedGradientFvPatchFields.H"
#include "fvsPatchFields.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
         Class alphaContactAngleTwoPhaseFvPatchScalarField Declaration
\*---------------------------------------------------------------------------*/
 
class alphaContactAngleTwoPhaseFvPatchScalarField
:
    public fixedGradientFvPatchScalarField
{
public:
 
    // Abstract class, no runtime information
 
    //- Alpha limit options
    enum limitControls
    {
        lcNone,
        lcGradient,
        lcZeroGradient,
        lcAlpha
    };
 
    static const Enum<limitControls> limitControlNames_;
    limitControls limit_;
 
    // Constructors
 
        //- Construct from patch and internal field
        alphaContactAngleTwoPhaseFvPatchScalarField
        (
            const fvPatch&,
            const DimensionedField<scalar, volMesh>&
        );
 
        //- Construct from patch, internal field and dictionary
        alphaContactAngleTwoPhaseFvPatchScalarField
        (
            const fvPatch&,
            const DimensionedField<scalar, volMesh>&,
            const dictionary&
        );
 
        //- Construct by mapping onto a new patch
        alphaContactAngleTwoPhaseFvPatchScalarField
        (
            const alphaContactAngleTwoPhaseFvPatchScalarField&,
            const fvPatch&,
            const DimensionedField<scalar, volMesh>&,
            const fvPatchFieldMapper&
        );
 
        //- Construct as copy
        alphaContactAngleTwoPhaseFvPatchScalarField
        (
            const alphaContactAngleTwoPhaseFvPatchScalarField&
        );
 
        //- Construct as copy setting internal field reference
        alphaContactAngleTwoPhaseFvPatchScalarField
        (
            const alphaContactAngleTwoPhaseFvPatchScalarField&,
            const DimensionedField<scalar, volMesh>&
        );
 
 
    // Member functions
 
        //- Return the contact angle
        virtual tmp<scalarField> theta
        (
            const fvPatchVectorField& Up,
            const fvsPatchVectorField& nHat
        ) const = 0;
 
        //- Evaluate the patch field
        virtual void evaluate
        (
            const Pstream::commsTypes commsType=Pstream::commsTypes::blocking
        );
 
        //- Write
        virtual void write(Ostream& os) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //