| /*---------------------------------------------------------------------------*\ | |
| ========= | | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | |
| \\ / O peration | Website: https://openfoam.org | |
| \\ / A nd | Copyright (C) 2011-2018 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/>. | |
| \*---------------------------------------------------------------------------*/ | |
| // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * // | |
| Foam::vector Foam::cellModel::centre | |
| ( | |
| const labelList& pointLabels, | |
| const pointField& points | |
| ) const | |
| { | |
| // Estimate centre of cell | |
| vector cEst = Zero; | |
| // Sum the points indicated by the label list | |
| forAll(pointLabels, i) | |
| { | |
| cEst += points[pointLabels[i]]; | |
| } | |
| // Average by dividing by the number summed over. | |
| cEst /= scalar(pointLabels.size()); | |
| // Calculate the centre by breaking the cell into pyramids and | |
| // volume-weighted averaging their centres | |
| scalar sumV = 0.0; | |
| vector sumVc = Zero; | |
| const faceList cellFaces = faces(pointLabels); | |
| forAll(cellFaces, i) | |
| { | |
| const face& curFace = cellFaces[i]; | |
| scalar pyrVol = | |
| pyramid<point, const point&, const face&> | |
| ( | |
| curFace, | |
| cEst | |
| ).mag(points); | |
| if (pyrVol > small) | |
| { | |
| WarningInFunction | |
| << "zero or negative pyramid volume: " << -pyrVol | |
| << " for face " << i | |
| << endl; | |
| } | |
| sumVc -= | |
| pyrVol | |
| *pyramid<point, const point&, const face&>(curFace, cEst) | |
| .centre(points); | |
| sumV -= pyrVol; | |
| } | |
| return sumVc/(sumV + vSmall); | |
| } | |
| Foam::scalar Foam::cellModel::mag | |
| ( | |
| const labelList& pointLabels, | |
| const pointField& points | |
| ) const | |
| { | |
| // Estimate centre of cell | |
| vector cEst = Zero; | |
| // Sum the points indicated by the label list | |
| forAll(pointLabels, i) | |
| { | |
| cEst += points[pointLabels[i]]; | |
| } | |
| // Average by dividing by the number summed over. | |
| cEst /= scalar(pointLabels.size()); | |
| // Calculate the magnitude by summing the -mags of the pyramids | |
| // The sign change is because the faces point outwards | |
| // and a pyramid is constructed from an inward pointing face | |
| // and the base centre-apex vector | |
| scalar v = 0; | |
| const faceList cellFaces = faces(pointLabels); | |
| forAll(cellFaces, i) | |
| { | |
| const face& curFace =cellFaces[i]; | |
| scalar pyrVol = | |
| pyramid<point, const point&, const face&> | |
| ( | |
| curFace, | |
| cEst | |
| ).mag(points); | |
| if (pyrVol > small) | |
| { | |
| WarningInFunction | |
| << "zero or negative pyramid volume: " << -pyrVol | |
| << " for face " << i | |
| << endl; | |
| } | |
| v -= pyrVol; | |
| } | |
| return v; | |
| } | |
| // ************************************************************************* // | |