146 lines
4.8 KiB
C++
146 lines
4.8 KiB
C++
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/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 1991-2010 OpenCFD Ltd.
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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Application
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RichardsFoam
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Description
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Transient solver for flow in unsaturated porous media
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With chord slope formulation of the Richards equation.
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van Genuchten laws for unsaturated hydraulic properties parametrisation
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Global computation of the convergence criterium
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Adaptative time stepping with a stabilisation procedure
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NB 1: use backward scheme for time discretisation
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NB 2: use only mesh with constant cell volumes
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References
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version 0.0 (develloped with OpenFOAM 2.0.1)
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Details may be found in:
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Orgogozo, L., Renon, N., Soulaine, C., Hénon, F., Tomer, S.K., Labat, D.,
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Pokrovsky, O.S., Sekhar, M., Ababou, R., Quintard, M., Submitted.
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Mechanistic modelling of water fluxes at the watershed scale: An open source
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massively parallel solver for Richards equation.
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Submitted to Computer Physics Communications.
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\*---------------------------------------------------------------------------*/
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#include "fvCFD.H"
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#include "pimpleControl.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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int main(int argc, char *argv[])
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{
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# include "setRootCase.H"
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# include "createTime.H"
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# include "createMesh.H"
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// pimpleControl pimple(mesh);
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# include "readPicardControls.H"
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# include "createFields.H"
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# include "initContinuityErrs.H"
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# include "createTimeControls.H"
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Info<< "\nStarting time loop\n" << endl;
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// starting of the time loop.
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while (runTime.loop())
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{
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// time step control operations.
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# include "readTimeControls.H"
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# include "setDeltaT.H"
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// runTime++;
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Info<< "Time = " << runTime.timeName() << nl << endl;
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// Beginning of the stabilisation loop for the stabilised adaptive time
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// step procedure.
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for (int cyc = 0; cyc < nMaxCycle; cyc++)
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{
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// Beginning of the Picard loop.
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for (int pic = 0; pic < nIterPicard; pic++)
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{
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# include "psiEqn.H"
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}
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// Exit test for the loop associated with the stabilisation cycles
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// for the adaptive time step procedure.
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if (crit < precPicard)
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{
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break;
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}
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else
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{
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Info << "Criterion not reached, restart time loop iteration"
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<< "with a smaller time step / Error = " << crit
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<< nl << endl;
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runTime.setDeltaT((1/tFact)*runTime.deltaTValue());
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Info<< "deltaT = " << runTime.deltaTValue() << endl;
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}
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// End of the stabilisation cycles loop.
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}
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// Warning test in case of convergence failure of the Picard loop.
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if (crit >= precPicard)
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{
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Info<< "Convergence failure / Error = " << crit << nl << endl;
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currentPicard = nIterPicard;
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}
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// Final updating of the result fields before going to the next time
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// iteration.
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psi_tmp = psi;
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thtil_tmp = 0.5*
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(
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(1 + sign(psi_tmp)) + (1 - sign(psi_tmp))*
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pow((1 + pow(mag(alpha*psi_tmp),n)), - (1 - (1/n)))
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);
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theta = (thetas - thetar)*thtil + thetar;
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U = - Krel*((fvc::grad(psi)) + vuz);
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// Writting of the result.
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runTime.write();
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Info<< "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
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<< " ClockTime = " << runTime.elapsedClockTime() << " s"
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<< nl << endl;
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// end of the time loop.
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}
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Info<< "End\n" << endl;
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return 0;
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}
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// ************************************************************************* //
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