applications/utilities/postProcessing/patch/patchAverage/patchAverage.C

   1 /*---------------------------------------------------------------------------*\
   2   =========                 |
   3   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   4    \\    /   O peration     |
   5     \\  /    A nd           | Copyright (C) 2004-2010 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     patchAverage
  26
  27 Description
  28     Calculates the average of the specified field over the specified patch.
  29
  30 \*---------------------------------------------------------------------------*/
  31
  32 #include "fvCFD.H"
  33
  34 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  35 // Main program:
  36
  37 int main(int argc, char *argv[])
  38 {
  39     timeSelector::addOptions();
  40     argList::validArgs.append("fieldName");
  41     argList::validArgs.append("patchName");
  42 #   include "setRootCase.H"
  43 #   include "createTime.H"
  44     instantList timeDirs = timeSelector::select0(runTime, args);
  45 #   include "createMesh.H"
  46
  47     const word fieldName = args[1];
  48     const word patchName = args[2];
  49
  50     forAll(timeDirs, timeI)
  51     {
  52         runTime.setTime(timeDirs[timeI], timeI);
  53         Info<< "Time = " << runTime.timeName() << endl;
  54
  55         IOobject fieldHeader
  56         (
  57             fieldName,
  58             runTime.timeName(),
  59             mesh,
  60             IOobject::MUST_READ
  61         );
  62
  63         // Check field exists
  64         if (fieldHeader.headerOk())
  65         {
  66             mesh.readUpdate();
  67
  68             const label patchI = mesh.boundaryMesh().findPatchID(patchName);
  69             if (patchI < 0)
  70             {
  71                 FatalError
  72                     << "Unable to find patch " << patchName << nl
  73                     << exit(FatalError);
  74             }
  75
  76             if (fieldHeader.headerClassName() == "volScalarField")
  77             {
  78                 Info<< "    Reading volScalarField " << fieldName << endl;
  79                 volScalarField field(fieldHeader, mesh);
  80
  81                 scalar area = gSum(mesh.magSf().boundaryField()[patchI]);
  82                 scalar sumField = 0;
  83
  84                 if (area > 0)
  85                 {
  86                     sumField = gSum
  87                     (
  88                         mesh.magSf().boundaryField()[patchI]
  89                       * field.boundaryField()[patchI]
  90                     ) / area;
  91                 }
  92
  93                 Info<< "    Average of " << fieldName << " over patch "
  94                     << patchName << '[' << patchI << ']' << " = "
  95                     << sumField << endl;
  96             }
  97             else
  98             {
  99                 FatalError
 100                     << "Only possible to average volScalarFields "
 101                     << nl << exit(FatalError);
 102             }
 103         }
 104         else
 105         {
 106             Info<< "    No field " << fieldName << endl;
 107         }
 108
 109         Info<< endl;
 110     }
 111
 112     Info<< "End\n" << endl;
 113
 114     return 0;
 115 }
 116
 117 // ************************************************************************* //