FreeFOAM The Cross-Platform CFD Toolkit
RosinRammler.C
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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 |
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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
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18  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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24 \*---------------------------------------------------------------------------*/
25 
26 #include "RosinRammler.H"
28 
29 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
30 
31 namespace Foam
32 {
33  namespace pdfs
34  {
35  defineTypeNameAndDebug(RosinRammler, 0);
36  addToRunTimeSelectionTable(pdf, RosinRammler, dictionary);
37  }
38 }
39 
40 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
41 
43 :
44  pdf(typeName, dict, rndGen),
45  minValue_(readScalar(pdfDict_.lookup("minValue"))),
46  maxValue_(readScalar(pdfDict_.lookup("maxValue"))),
47  d_(readScalar(pdfDict_.lookup("d"))),
48  n_(readScalar(pdfDict_.lookup("n")))
49 {
50  check();
51 }
52 
53 
54 // * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
55 
57 {}
58 
59 
60 // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
61 
63 {
64 
65  scalar K = 1.0 - exp(-pow((maxValue_ - minValue_)/d_, n_));
66  scalar y = rndGen_.scalar01();
67  scalar x = minValue_ + d_*::pow(-log(1.0 - y*K), 1.0/n_);
68  return x;
69 }
70 
71 
73 {
74  return minValue_;
75 }
76 
77 
79 {
80  return maxValue_;
81 }
82 
83 
84 // ************************ vim: set sw=4 sts=4 et: ************************ //