| /*---------------------------------------------------------------------------*\ | |
| ========= | | |
| \\ / 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 | |
| \*---------------------------------------------------------------------------*/ | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| 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 | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| // ************************************************************************* // | |