81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
/*---------------------------------------------------------------------------*\
|
|
========= |
|
|
\\ / F ield | foam-extend: Open Source CFD
|
|
\\ / O peration |
|
|
\\ / A nd | For copyright notice see file Copyright
|
|
\\/ M anipulation |
|
|
-------------------------------------------------------------------------------
|
|
License
|
|
This file is part of foam-extend.
|
|
|
|
foam-extend 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.
|
|
|
|
foam-extend 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 foam-extend. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
Application
|
|
engineSwirl
|
|
|
|
Description
|
|
Generates a swirling flow for engine calulations
|
|
|
|
\*---------------------------------------------------------------------------*/
|
|
|
|
#include "fvCFD.H"
|
|
#include "mathematicalConstants.H"
|
|
|
|
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
|
|
# include "setRootCase.H"
|
|
# include "createTime.H"
|
|
# include "createMesh.H"
|
|
# include "createFields.H"
|
|
|
|
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
|
|
|
|
scalar Vphi = (mathematicalConstant::pi*swirlRPMRatio*rpm/30).value();
|
|
scalar b1 = j1(swirlProfile).value();
|
|
scalar b2 = 2.0*b1/swirlProfile.value() - j0(swirlProfile).value();
|
|
|
|
scalar omega = 0.125*(Vphi*bore*swirlProfile/b2).value();
|
|
|
|
scalar cylinderRadius = 0.5*bore.value();
|
|
|
|
scalar Umax = 0.0;
|
|
forAll(mesh.C(), celli)
|
|
{
|
|
vector c = mesh.C()[celli] - swirlCenter;
|
|
scalar r = ::pow(sqr(c & xT) + sqr(c & yT), 0.5);
|
|
|
|
if (r <= cylinderRadius)
|
|
{
|
|
scalar b = j1(swirlProfile*r/cylinderRadius).value();
|
|
scalar vEff = omega*b;
|
|
r = max(r, SMALL);
|
|
U[celli] = ((vEff/r)*(c & yT))*xT + (-(vEff/r)*(c & xT))*yT;
|
|
Umax = max(Umax, mag(U[celli]));
|
|
}
|
|
}
|
|
|
|
Info << "Umax = " << Umax << endl;
|
|
|
|
U.write();
|
|
|
|
Info << "\n end\n";
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
// ************************************************************************* //
|