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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2011-2026 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
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
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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::mixedFvPatchField
Description
This boundary condition provides a base class for 'mixed' type boundary
conditions, i.e. conditions that mix fixed value and patch-normal gradient
conditions.
The respective contributions from each is determined by a weight field:
\f[
x_p = w x_p + (1-w) \left(x_c + \frac{\nabla_\perp x}{\Delta}\right)
\f]
where
\vartable
x_p | patch values
x_c | patch internal cell values
w | weight field (0-1)
\Delta | inverse distance from face centre to internal cell centre
\endvartable
Usage
\table
Property | Description | Required | Default value
refValue | reference value | yes |
refGradient | reference normal gradient | yes |
valueFraction | weight field | yes |
\endtable
Note:
This condition is not usually applied directly; instead, use a derived
mixed condition such as \c inletOutlet
See also
Foam::inletOutletFvPatchField
SourceFiles
mixedFvPatchField.C
\*---------------------------------------------------------------------------*/
#ifndef mixedFvPatchField_H
#define mixedFvPatchField_H
#include "fvPatchField.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
/*---------------------------------------------------------------------------*\
Class mixedFvPatchField Declaration
\*---------------------------------------------------------------------------*/
template<class Type>
class mixedFvPatchField
:
public fvPatchField<Type>
{
// Private Data
//- Value field
Field<Type> refValue_;
//- Normal gradient field
Field<Type> refGrad_;
//- Fraction (0-1) of value used for boundary condition
scalarField valueFraction_;
public:
//- Runtime type information
TypeName("mixed");
// Constructors
//- Construct from patch and internal field
mixedFvPatchField
(
const fvPatch&,
const DimensionedField<Type, fvMesh>&
);
//- Construct from patch, internal field and dictionary
mixedFvPatchField
(
const fvPatch&,
const DimensionedField<Type, fvMesh>&,
const dictionary&,
const bool valuesRequired=true
);
//- Construct by mapping the given mixedFvPatchField onto a new patch
mixedFvPatchField
(
const mixedFvPatchField<Type>&,
const fvPatch&,
const DimensionedField<Type, fvMesh>&,
const fieldMapper&,
const bool mappingRequired=true
);
//- Disallow copy without setting internal field reference
mixedFvPatchField(const mixedFvPatchField<Type>&) = delete;
//- Copy constructor setting internal field reference
mixedFvPatchField
(
const mixedFvPatchField<Type>&,
const DimensionedField<Type, fvMesh>&
);
//- Construct and return a clone setting internal field reference
virtual tmp<fvPatchField<Type>> clone
(
const DimensionedField<Type, fvMesh>& iF
) const
{
return tmp<fvPatchField<Type>>
(
new mixedFvPatchField<Type>(*this, iF)
);
}
// Member Functions
using fvPatchField<Type>::patch;
using fvPatchField<Type>::patchInternalField;
// Access
//- Return true if this patch field fixes a value.
// Needed to check if a level has to be specified while solving
// Poissons equations.
virtual bool fixesValue() const
{
return true;
}
//- Return false: this patch field is not altered by assignment
virtual bool assignable() const
{
return false;
}
// Return defining fields
virtual Field<Type>& refValue()
{
return refValue_;
}
virtual const Field<Type>& refValue() const
{
return refValue_;
}
virtual Field<Type>& refGrad()
{
return refGrad_;
}
virtual const Field<Type>& refGrad() const
{
return refGrad_;
}
virtual scalarField& valueFraction()
{
return valueFraction_;
}
virtual const scalarField& valueFraction() const
{
return valueFraction_;
}
// Mapping functions
//- Map the given fvPatchField onto this fvPatchField
virtual void map(const fvPatchField<Type>&, const fieldMapper&);
//- Reset the fvPatchField to the given fvPatchField
// Used for mesh to mesh mapping
virtual void reset(const fvPatchField<Type>&);
// Evaluation functions
//- Return gradient at boundary
virtual tmp<Field<Type>> snGrad() const;
//- Evaluate the patch field
virtual void evaluate
(
const Pstream::commsTypes commsType =
Pstream::commsTypes::blocking
);
//- Return the matrix diagonal coefficients corresponding to the
// evaluation of the value of this patchField with given weights
virtual tmp<Field<Type>> valueInternalCoeffs
(
const tmp<scalarField>&
) const;
//- Return the matrix source coefficients corresponding to the
// evaluation of the value of this patchField with given weights
virtual tmp<Field<Type>> valueBoundaryCoeffs
(
const tmp<scalarField>&
) const;
//- Return the matrix diagonal coefficients corresponding to the
// evaluation of the gradient of this patchField
virtual tmp<Field<Type>> gradientInternalCoeffs() const;
//- Return the matrix source coefficients corresponding to the
// evaluation of the gradient of this patchField
virtual tmp<Field<Type>> gradientBoundaryCoeffs() const;
//- Write
virtual void write(Ostream&) const;
// Member Operators
virtual void operator=(const UList<Type>&) {}
virtual void operator=(const Field<Type>&) {}
virtual void operator=(const fvPatchField<Type>&) {}
//- Virtual assign to an expression
virtual void operator=(const expression::Assignment<Field<Type>>& a)
{}
virtual void operator+=(const fvPatchField<Type>&) {}
virtual void operator-=(const fvPatchField<Type>&) {}
virtual void operator*=(const fvPatchField<scalar>&) {}
virtual void operator/=(const fvPatchField<scalar>&) {}
virtual void operator+=(const Field<Type>&) {}
virtual void operator-=(const Field<Type>&) {}
virtual void operator*=(const Field<scalar>&) {}
virtual void operator/=(const Field<scalar>&) {}
virtual void operator=(const Type&) {}
virtual void operator+=(const Type&) {}
virtual void operator-=(const Type&) {}
virtual void operator*=(const scalar) {}
virtual void operator/=(const scalar) {}
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#ifdef NoRepository
#include "mixedFvPatchField.C"
#endif
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //
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