140 lines
4.1 KiB
C++
140 lines
4.1 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration | Website: https://openfoam.org
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\\ / A nd | Copyright (C) 2011-2024 OpenFOAM Foundation
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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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engineCompRatio
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Description
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Calculate the compression ratio of the engine combustion chamber
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If the combustion chamber is not the entire mesh a \c cellSet or
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\c cellZone name of the cells in the combustion chamber can be provided.
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Usage
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\b engineCompRatio [OPTION]
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- \par -cellSet \<name\>
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Specify the cellSet name of the combustion chamber
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- \par -cellZone zoneName
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Specify the cellZone name of the combustion chamber
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\*---------------------------------------------------------------------------*/
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#include "argList.H"
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#include "volMesh.H"
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#include "cellSet.H"
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using namespace Foam;
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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int main(int argc, char *argv[])
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{
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#include "addRegionOption.H"
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argList::addOption
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(
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"cellSet",
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"name",
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"Calculate the volume of the specified cellSet"
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);
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argList::addOption
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(
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"cellZone",
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"name",
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"Calculate the volume of the specified cellZone"
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);
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#include "setRootCase.H"
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#include "createTime.H"
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#include "createRegionMesh.H"
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// Cell labels of the cells in the combustion chamber
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// Defaults to all cells
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labelList ccCells(identityMap(mesh.nCells()));
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word cellSetName;
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word cellZoneName;
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if (args.optionReadIfPresent("cellSet", cellSetName))
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{
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// Read the cellSet for the combustion chamber
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const cellSet ccCellSet(mesh, cellSetName);
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ccCells = ccCellSet.toc();
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}
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else if (args.optionReadIfPresent("cellZone", cellZoneName))
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{
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const cellZone& ccCellZone = mesh.cellZones()[cellZoneName];
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ccCells = ccCellZone;
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}
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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const scalar eps = 1.0e-10;
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// Search for the CA >= the current CA which is divisible by 180
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int ca0 = -360;
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while (runTime.userTimeValue() > ca0)
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{
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ca0 += 180;
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}
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int ca1 = ca0 + 180;
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if (mag(runTime.userTimeValue() - ca0) > eps)
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{
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const scalar t0 = runTime.userTimeToTime(ca0 - runTime.userTimeValue());
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runTime.setDeltaT(t0);
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runTime++;
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Info<< "Moving to CA = " << runTime.userTimeValue() << endl;
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mesh.move();
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}
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const scalar V0 = gSum(scalarField(mesh.V(), ccCells));
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Info << "Volume at " << runTime.userTimeValue() << "CA = " << V0 << endl;
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if (mag(runTime.userTimeValue()-ca1) > eps)
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{
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const scalar t1 = runTime.userTimeToTime(ca1 - runTime.userTimeValue());
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runTime.setDeltaT(t1);
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runTime++;
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Info<< "Moving to CA = " << runTime.userTimeValue() << endl;
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mesh.move();
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}
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const scalar V1 = gSum(scalarField(mesh.V(), ccCells));
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Info << "Volume at " << runTime.userTimeValue() << "CA = " << V1 << endl;
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const scalar Vmin(min(V0, V1));
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const scalar Vmax(max(V0, V1));
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Info<< "\nCompression ratio = " << Vmax/Vmin << endl;
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Info<< "\nEnd\n" << endl;
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return 0;
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}
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// ************************************************************************* //
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