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

   1 /*---------------------------------------------------------------------------*\
   2   =========                 |
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   5     \\  /    A nd           | Copyright (C) 2011 OpenFOAM Foundation
   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 Class
  25     Foam::NVDTVD
  26
  27 Description
  28     Foam::NVDTVD
  29
  30 \*---------------------------------------------------------------------------*/
  31
  32 #ifndef NVDTVD_H
  33 #define NVDTVD_H
  34
  35 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  36
  37 namespace Foam
  38 {
  39
  40 /*---------------------------------------------------------------------------*\
  41                            Class LimitedScheme Declaration
  42 \*---------------------------------------------------------------------------*/
  43
  44 class NVDTVD
  45 {
  46
  47 public:
  48
  49     typedef scalar phiType;
  50     typedef vector gradPhiType;
  51
  52
  53     // Null Constructor
  54
  55         NVDTVD()
  56         {}
  57
  58
  59     // Member Functions
  60
  61         scalar phict
  62         (
  63             const scalar faceFlux,
  64             const scalar phiP,
  65             const scalar phiN,
  66             const vector& gradcP,
  67             const vector& gradcN,
  68             const vector& d
  69         ) const
  70         {
  71             scalar gradf = phiN - phiP;
  72
  73             scalar gradcf;
  74
  75             if (faceFlux > 0)
  76             {
  77                 gradcf = d & gradcP;
  78             }
  79             else
  80             {
  81                 gradcf = d & gradcN;
  82             }
  83
  84             // Stabilise for division
  85             gradcf = stabilise(gradcf, VSMALL);
  86
  87             return 1 - 0.5*gradf/gradcf;
  88         }
  89
  90
  91         scalar r
  92         (
  93             const scalar faceFlux,
  94             const scalar phiP,
  95             const scalar phiN,
  96             const vector& gradcP,
  97             const vector& gradcN,
  98             const vector& d
  99         ) const
 100         {
 101             scalar gradf = phiN - phiP;
 102
 103             scalar gradcf;
 104
 105             if (faceFlux > 0)
 106             {
 107                 gradcf = d & gradcP;
 108             }
 109             else
 110             {
 111                 gradcf = d & gradcN;
 112             }
 113
 114             // Stabilise for division
 115             gradf = stabilise(gradf, VSMALL);
 116
 117             return 2*(gradcf/gradf) - 1;
 118         }
 119 };
 120
 121
 122 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 123
 124 } // End namespace Foam
 125
 126 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 127
 128 #endif
 129
 130 // ************************************************************************* //