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foam-extend4.1-coherent-io/tutorials/finiteArea/liquidFilmFoam/dropsSpreading/setInitialDroplet/setInitialDroplet.C

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/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright held by original author
\\/ 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 2 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, write to the Free Software Foundation,
Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Description
Set inital film thickness for droplet spreading case.
\*---------------------------------------------------------------------------*/
#include "fvCFD.H"
#include "faCFD.H"
using namespace Foam;
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
int main(int argc, char *argv[])
{
# include "setRootCase.H"
# include "createTime.H"
# include "createMesh.H"
# include "createFaMesh.H"
# include "readTransportProperties.H"
Info << "Reading field h" << endl;
areaScalarField h
(
IOobject
(
"h",
runTime.timeName(),
mesh,
IOobject::MUST_READ,
IOobject::AUTO_WRITE
),
aMesh
);
scalar D = 0.000038;
scalar A = 0.0014;
scalar R = (sqr(A) + sqr(D))/(2*D);
Info << "Spherical cap radius: " << R << " m" << endl;
scalarField& hI = h.internalField();
const vectorField& Cf = aMesh.areaCentres().internalField();
scalarField a = sqrt
(
sqr(Cf.component(vector::X))
+ sqr(Cf.component(vector::Y))
);
hI = pos(A - a)*(sqrt(sqr(R) - sqr(a)) - (R - D))
+ neg(A - a)*h0.value();
h.write();
Info<< "\nEnd" << endl;
return 0;
}
// ************************************************************************* //