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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2023-2026 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/>.
\*---------------------------------------------------------------------------*/
#include "dynamicContactAngle.H"
#include "addToRunTimeSelectionTable.H"
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
namespace Foam
{
namespace contactAngleModels
{
defineTypeNameAndDebug(dynamic, 0);
addToRunTimeSelectionTable(contactAngleModel, dynamic, dictionary);
}
}
// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
Foam::contactAngleModels::dynamic::dynamic(const dictionary& dict)
:
theta0_(dict.lookup<scalar>("theta0", units::degrees)),
uTheta_(dict.lookup<scalar>("uTheta", dimensions::velocity)),
thetaAdv_(dict.lookup<scalar>("thetaAdv", units::degrees)),
thetaRec_(dict.lookup<scalar>("thetaRec", units::degrees))
{}
// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
Foam::contactAngleModels::dynamic::~dynamic()
{}
// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
Foam::tmp<Foam::scalarField>
Foam::contactAngleModels::dynamic::cosTheta
(
const fvPatchVectorField& Up,
const vectorField& nHat
) const
{
const vectorField nf(Up.patch().nf());
// Calculated the component of the velocity parallel to the wall
vectorField U(Up.patchInternalField() - Up);
U -= (nf & U)*nf;
// Find the direction of the interface parallel to the wall and normalise
vectorField n(nHat - (nf & nHat)*nf);
n /= (mag(n) + small);
// Calculate the velocity coefficient
// from the component of U normal to the interface
const scalarField uCoeff(tanh((n & U)/uTheta_));
return cos
(
theta0_
+ (thetaRec_ - theta0_)*max(uCoeff, scalar(0))
- (thetaAdv_ - theta0_)*min(uCoeff, scalar(0))
);
}
void Foam::contactAngleModels::dynamic::write(Ostream& os) const
{
writeEntry(os, "theta0", units::degrees, theta0_);
writeEntry(os, "uTheta", dimensions::velocity, uTheta_);
writeEntry(os, "thetaAdv", units::degrees, thetaAdv_);
writeEntry(os, "thetaRec", units::degrees, thetaRec_);
}
// ************************************************************************* //
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