src/finiteVolume/interpolation/surfaceInterpolation/limitedSchemes/LimitedScheme/NVDTVD.H

   1 /*---------------------------------------------------------------------------*\
   2   =========                 |
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   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 Class
  26     Foam::NVDTVD
  27
  28 Description
  29     Foam::NVDTVD
  30
  31 \*---------------------------------------------------------------------------*/
  32
  33 #ifndef NVDTVD_H
  34 #define NVDTVD_H
  35
  36 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  37
  38 namespace Foam
  39 {
  40
  41 /*---------------------------------------------------------------------------*\
  42                            Class LimitedScheme Declaration
  43 \*---------------------------------------------------------------------------*/
  44
  45 class NVDTVD
  46 {
  47
  48 public:
  49
  50     typedef scalar phiType;
  51     typedef vector gradPhiType;
  52
  53
  54     // Null Constructor
  55
  56         NVDTVD()
  57         {}
  58
  59
  60     // Member Functions
  61
  62         scalar phict
  63         (
  64             const scalar faceFlux,
  65             const scalar phiP,
  66             const scalar phiN,
  67             const vector& gradcP,
  68             const vector& gradcN,
  69             const vector& d
  70         ) const
  71         {
  72             scalar gradf = phiN - phiP;
  73
  74             scalar gradcf;
  75
  76             if (faceFlux > 0)
  77             {
  78                 gradcf = d & gradcP;
  79             }
  80             else
  81             {
  82                 gradcf = d & gradcN;
  83             }
  84
  85             // Stabilise for division
  86             gradcf = stabilise(gradcf, VSMALL);
  87
  88             return 1 - 0.5*gradf/gradcf;
  89         }
  90
  91
  92         scalar r
  93         (
  94             const scalar faceFlux,
  95             const scalar phiP,
  96             const scalar phiN,
  97             const vector& gradcP,
  98             const vector& gradcN,
  99             const vector& d
 100         ) const
 101         {
 102             scalar gradf = phiN - phiP;
 103
 104             scalar gradcf;
 105
 106             if (faceFlux > 0)
 107             {
 108                 gradcf = d & gradcP;
 109             }
 110             else
 111             {
 112                 gradcf = d & gradcN;
 113             }
 114
 115             // Stabilise for division
 116             gradf = stabilise(gradf, VSMALL);
 117
 118             return 2*(gradcf/gradf) - 1;
 119         }
 120 };
 121
 122
 123 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 124
 125 } // End namespace Foam
 126
 127 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 128
 129 #endif
 130
 131 // ************************************************************************* //