| /*---------------------------------------------------------------------------*\ | |
| ========= | | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | |
| \\ / O peration | Website: https://openfoam.org | |
| \\ / A nd | Copyright (C) 2011-2026 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/>. | |
| \*---------------------------------------------------------------------------*/ | |
| // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * // | |
| Foam::turbGen::turbGen(const Kmesh& k, const scalar EA, const scalar K0) | |
| : | |
| K_(k), | |
| Ea_(EA), | |
| k0_(K0), | |
| rndGen_(label(0)) | |
| {} | |
| // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * // | |
| Foam::vectorField Foam::turbGen::U() | |
| { | |
| const vectorField& K(K_); | |
| vectorField s(K.size()); | |
| scalarField rndPhases(K.size()); | |
| forAll(K, i) | |
| { | |
| s[i] = rndGen_.sample01<vector>(); | |
| rndPhases[i] = rndGen_.scalar01(); | |
| } | |
| s = K ^ s; | |
| s = s/(mag(s) + 1.0e-20); | |
| s = Ek(Ea_, k0_, mag(K))*s; | |
| complexVectorField up | |
| ( | |
| fft::reverseTransform | |
| ( | |
| ComplexField | |
| ( | |
| eval(cos(constant::mathematical::twoPi*rndPhases)*s), | |
| eval(sin(constant::mathematical::twoPi*rndPhases)*s) | |
| ), | |
| K_.nn() | |
| ) | |
| ); | |
| return ReImSum(up); | |
| } | |
| // ************************************************************************* // | |