FreeFOAM The Cross-Platform CFD Toolkit
pisoFoam.C
Go to the documentation of this file.
1 /*---------------------------------------------------------------------------*\
2  ========= |
3  \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
4  \\ / O peration |
5  \\ / A nd | Copyright (C) 1991-2010 OpenCFD Ltd.
6  \\/ M anipulation |
7 -------------------------------------------------------------------------------
8 License
9  This file is part of OpenFOAM.
10 
11  OpenFOAM is free software: you can redistribute it and/or modify it
12  under the terms of the GNU General Public License as published by
13  the Free Software Foundation, either version 3 of the License, or
14  (at your option) any later version.
15 
16  OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
17  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
18  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19  for more details.
20 
21  You should have received a copy of the GNU General Public License
22  along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
23 
24 Application
25  pisoFoam
26 
27 Description
28  Transient solver for incompressible flow.
29 
30  Turbulence modelling is generic, i.e. laminar, RAS or LES may be selected.
31 
32 Usage
33  - pisoFoam [OPTION]
34 
35  @param -case <dir> \n
36  Specify the case directory
37 
38  @param -parallel \n
39  Run the case in parallel
40 
41  @param -help \n
42  Display short usage message
43 
44  @param -doc \n
45  Display Doxygen documentation page
46 
47  @param -srcDoc \n
48  Display source code
49 
50 \*---------------------------------------------------------------------------*/
51 
52 #include <finiteVolume/fvCFD.H>
55 
56 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
57 
58 int main(int argc, char *argv[])
59 {
60  #include <OpenFOAM/setRootCase.H>
61 
62  #include <OpenFOAM/createTime.H>
63  #include <OpenFOAM/createMesh.H>
64  #include "createFields.H"
66 
67  // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
68 
69  Info<< "\nStarting time loop\n" << endl;
70 
71  while (runTime.loop())
72  {
73  Info<< "Time = " << runTime.timeName() << nl << endl;
74 
76  #include <finiteVolume/CourantNo.H>
77 
78  // Pressure-velocity PISO corrector
79  {
80  // Momentum predictor
81 
83  (
84  fvm::ddt(U)
85  + fvm::div(phi, U)
86  + turbulence->divDevReff(U)
87  );
88 
89  UEqn.relax();
90 
92  {
93  solve(UEqn == -fvc::grad(p));
94  }
95 
96  // --- PISO loop
97 
98  for (int corr=0; corr<nCorr; corr++)
99  {
100  volScalarField rUA = 1.0/UEqn.A();
101 
102  U = rUA*UEqn.H();
103  phi = (fvc::interpolate(U) & mesh.Sf())
104  + fvc::ddtPhiCorr(rUA, U, phi);
105 
106  adjustPhi(phi, U, p);
107 
108  // Non-orthogonal pressure corrector loop
109  for (int nonOrth=0; nonOrth<=nNonOrthCorr; nonOrth++)
110  {
111  // Pressure corrector
112 
113  fvScalarMatrix pEqn
114  (
115  fvm::laplacian(rUA, p) == fvc::div(phi)
116  );
117 
118  pEqn.setReference(pRefCell, pRefValue);
119 
120  if
121  (
122  corr == nCorr-1
123  && nonOrth == nNonOrthCorr
124  )
125  {
126  pEqn.solve(mesh.solver("pFinal"));
127  }
128  else
129  {
130  pEqn.solve();
131  }
132 
133  if (nonOrth == nNonOrthCorr)
134  {
135  phi -= pEqn.flux();
136  }
137  }
138 
140 
141  U -= rUA*fvc::grad(p);
142  U.correctBoundaryConditions();
143  }
144  }
145 
146  turbulence->correct();
147 
148  runTime.write();
149 
150  Info<< "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
151  << " ClockTime = " << runTime.elapsedClockTime() << " s"
152  << nl << endl;
153  }
154 
155  Info<< "End\n" << endl;
156 
157  return 0;
158 }
159 
160 
161 // ************************ vim: set sw=4 sts=4 et: ************************ //