File size: 2,913 Bytes
5a600cf | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 | /*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2011-2024 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
OpenFOAM is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
Class
Foam::OUprocess
Description
Random Ornstein-Uhlenbeck process
SourceFiles
OUprocess.C
\*---------------------------------------------------------------------------*/
#ifndef OUprocess_H
#define OUprocess_H
#include "complexFields.H"
#include "scalar.H"
#include "standardNormal.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
class Kmesh;
/*---------------------------------------------------------------------------*\
Class OUprocess Declaration
\*---------------------------------------------------------------------------*/
class OUprocess
{
// Private Data
const distributions::standardNormal stdNormal_;
const Kmesh& Kmesh_;
mutable complexVectorField OUfield_;
// Ornstein-Uhlenbeck process coefficients
scalar alpha_;
scalar sigma_;
scalar kUpper_;
scalar kLower_;
scalar scale_;
// Private Member Functions
//- Return the Weiner process field
complexVector WeinerProcess(const scalar deltaT) const;
public:
// Constructors
//- Construct from wavenumber mesh, timestep and coefficients dict
OUprocess
(
const Kmesh& kmesh,
const scalar deltaT,
const dictionary&
);
// Member Functions
//- Return the current random Ornstein-Uhlenbeck process field
const complexVectorField& newField(const scalar deltaT) const;
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //
|