1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2011-2015 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
OpenFOAM 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.
OpenFOAM 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 OpenFOAM. 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 = (constant::mathematical::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;
}
// ************************************************************************* //
|
