82 lines
2.6 KiB
C
82 lines
2.6 KiB
C
/*---------------------------------------------------------------------------*\
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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 held by original author
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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 the
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Free Software Foundation; either version 2 of the License, or (at your
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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, write to the Free Software Foundation,
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Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Application
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engineSwirl
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Description
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Generates a swirling flow for engine calulations
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\*---------------------------------------------------------------------------*/
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#include "fvCFD.H"
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#include "mathematicalConstants.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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# include "createFields.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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scalar Vphi = (mathematicalConstant::pi*swirlRPMRatio*rpm/30).value();
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scalar b1 = j1(swirlProfile).value();
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scalar b2 = 2.0*b1/swirlProfile.value() - j0(swirlProfile).value();
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scalar omega = 0.125*(Vphi*bore*swirlProfile/b2).value();
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scalar cylinderRadius = 0.5*bore.value();
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scalar Umax = 0.0;
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forAll(mesh.C(), celli)
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{
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vector c = mesh.C()[celli] - swirlCenter;
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scalar r = ::pow(sqr(c & xT) + sqr(c & yT), 0.5);
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if (r <= cylinderRadius)
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{
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scalar b = j1(swirlProfile*r/cylinderRadius).value();
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scalar vEff = omega*b;
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r = max(r, SMALL);
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U[celli] = ((vEff/r)*(c & yT))*xT + (-(vEff/r)*(c & xT))*yT;
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Umax = max(Umax, mag(U[celli]));
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}
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}
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Info << "Umax = " << Umax << endl;
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U.write();
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Info << "\n end\n";
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return 0;
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}
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// ************************************************************************* //
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