applications/utilities/postProcessing/velocityField/vorticity/vorticity.C

   1 /*---------------------------------------------------------------------------* \
   2   =========                 |
   3   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   4    \\    /   O peration     |
   5     \\  /    A nd           | Copyright (C) 1991-2009 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 the
  13     Free Software Foundation; either version 2 of the License, or (at your
  14     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, write to the Free Software Foundation,
  23     Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  24
  25 Application
  26     vorticity
  27
  28 Description
  29     Calculates and writes the vorticity of velocity field U.
  30
  31     The -noWrite option just outputs the max/min values without writing
  32     the field.
  33
  34 \*---------------------------------------------------------------------------*/
  35
  36 #include "calc.H"
  37 #include "fvc.H"
  38
  39 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  40
  41 void Foam::calc(const argList& args, const Time& runTime, const fvMesh& mesh)
  42 {
  43     bool writeResults = !args.optionFound("noWrite");
  44
  45     IOobject Uheader
  46     (
  47         "U",
  48         runTime.timeName(),
  49         mesh,
  50         IOobject::MUST_READ
  51     );
  52
  53     if (Uheader.headerOk())
  54     {
  55         Info<< "    Reading U" << endl;
  56         volVectorField U(Uheader, mesh);
  57
  58         Info<< "    Calculating vorticity" << endl;
  59         volVectorField vorticity
  60         (
  61             IOobject
  62             (
  63                 "vorticity",
  64                 runTime.timeName(),
  65                 mesh,
  66                 IOobject::NO_READ
  67             ),
  68             fvc::curl(U)
  69         );
  70
  71         volScalarField magVorticity
  72         (
  73             IOobject
  74             (
  75                 "magVorticity",
  76                 runTime.timeName(),
  77                 mesh,
  78                 IOobject::NO_READ
  79             ),
  80             mag(vorticity)
  81         );
  82
  83         Info<< "vorticity max/min : "
  84             << max(magVorticity).value() << " "
  85             << min(magVorticity).value() << endl;
  86
  87         if (writeResults)
  88         {
  89             vorticity.write();
  90             magVorticity.write();
  91         }
  92     }
  93     else
  94     {
  95         Info<< "    No U" << endl;
  96     }
  97
  98     Info<< "\nEnd\n" << endl;
  99 }
 100
 101
 102 // ************************************************************************* //