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calculateUfall.H
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calculateUfall.H
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/*---------------------------------------------------------------------------*\
Copyright (C) 2015 Cyrille Bonamy, Julien Chauchat, Tian-Jian Hsu
and contributors
License
This file is part of SedFOAM.
SedFOAM 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.
SedFOAM 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 SedFOAM. If not, see <http://www.gnu.org/licenses/>.
\*---------------------------------------------------------------------------*/
volScalarField eps
(
IOobject
(
"eps",
runTime.timeName(),
mesh,
IOobject::NO_READ,
IOobject::NO_WRITE
),
mesh,
dimensionedScalar("eps", dimensionSet(0, 1, -1, 0, 0), 1e-6)
);
volScalarField err
(
IOobject
(
"err",
runTime.timeName(),
mesh,
IOobject::NO_READ,
IOobject::NO_WRITE
),
mesh,
dimensionedScalar("err", dimensionSet(0, 1, -1, 0, 0), 0.1)
);
volScalarField Ufalltmp
(
IOobject
(
"Ufalltmp",
runTime.timeName(),
mesh,
IOobject::NO_READ,
IOobject::NO_WRITE
),
mesh,
dimensionedScalar("small_", dimensionSet(0, 1, -1, 0, 0), 1.e-6)
);
volScalarField UfallField
(
IOobject
(
"UfallField",
runTime.timeName(),
mesh,
IOobject::NO_READ,
IOobject::NO_WRITE
),
mesh,
dimensionedScalar("one", dimensionSet(0, 1, -1, 0, 0), 1.0)
);
scalar iter=0;
while ((err > eps) and (iter < 10))
{
iter = iter + 1;
UfallField = mag(gravity)*(rhoa-rhob)/draga->K(Ufalltmp);
err = max(mag(UfallField - Ufalltmp));
// under-relaxation for convergence stability
Ufalltmp = 0.5*Ufalltmp+0.5*UfallField;
//Info<<iter<<endl;
}
if (iter == 10)
{
Info << "Maximum number of iterations reached for settling "
<< "velocity calculation"<<endl;
}
Info << "Settling velocity in quiescent water: Ufall="
<< max(UfallField.internalField()).value()
<< " with residual:" << max(err).value() << endl;