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Diffstat (limited to 'src/boundary/momentaOnBoundaries2D.hh')
| -rw-r--r-- | src/boundary/momentaOnBoundaries2D.hh | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/src/boundary/momentaOnBoundaries2D.hh b/src/boundary/momentaOnBoundaries2D.hh new file mode 100644 index 0000000..5b373fe --- /dev/null +++ b/src/boundary/momentaOnBoundaries2D.hh @@ -0,0 +1,168 @@ +/* This file is part of the OpenLB library + * + * Copyright (C) 2006, 2007 Jonas Latt + * E-mail contact: info@openlb.net + * The most recent release of OpenLB can be downloaded at + * <http://www.openlb.net/> + * + * This program 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 2 + * of the License, or (at your option) any later version. + * + * This program 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 this program; if not, write to the Free + * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. +*/ + +/** \file + * Implementation of boundary cell dynamics -- generic implementation. + */ +#ifndef MOMENTA_ON_BOUNDARIES_2D_HH +#define MOMENTA_ON_BOUNDARIES_2D_HH + +#include "momentaOnBoundaries2D.h" +#include "dynamics/lbHelpers.h" +#include "dynamics/firstOrderLbHelpers.h" + +namespace olb { + +////////////////////// Class InnerCornerVelBM2D /////////////// + +template<typename T, typename DESCRIPTOR, + int normalX, int normalY> +InnerCornerVelBM2D<T,DESCRIPTOR,normalX,normalY>::InnerCornerVelBM2D() +{ + for (int iD=0; iD<DESCRIPTOR::d; ++iD) { + _u[iD] = T(); + } +} + +template<typename T, typename DESCRIPTOR, + int normalX, int normalY> +InnerCornerVelBM2D<T,DESCRIPTOR,normalX,normalY>::InnerCornerVelBM2D ( + const T u_[DESCRIPTOR::d]) +{ + for (int iD=0; iD<DESCRIPTOR::d; ++iD) { + _u[iD] = u_[iD]; + } +} + +template<typename T, typename DESCRIPTOR, + int normalX, int normalY> +T InnerCornerVelBM2D<T,DESCRIPTOR,normalX,normalY>::computeRho ( + Cell<T,DESCRIPTOR> const& cell ) const +{ + T rhoX = velocityBMRho<T, DESCRIPTOR, 0, normalX>(cell, _u); + T rhoY = velocityBMRho<T, DESCRIPTOR, 1, normalY>(cell, _u); + return (rhoX + rhoY) / (T)2; +} + +template<typename T, typename DESCRIPTOR, + int normalX, int normalY> +void InnerCornerVelBM2D<T,DESCRIPTOR,normalX,normalY>::computeU ( + Cell<T,DESCRIPTOR> const& cell, + T u[DESCRIPTOR::d] ) const +{ + for (int iD=0; iD<DESCRIPTOR::d; ++iD) { + u[iD] = _u[iD]; + } +} + +template<typename T, typename DESCRIPTOR, + int normalX, int normalY> +void InnerCornerVelBM2D<T,DESCRIPTOR,normalX,normalY>::computeJ ( + Cell<T,DESCRIPTOR> const& cell, + T j[DESCRIPTOR::d] ) const +{ + computeU(cell, j); + T rho = computeRho(cell); + for (int iD=0; iD<DESCRIPTOR::d; ++iD) { + j[iD] *= rho; + } +} + +template<typename T, typename DESCRIPTOR, + int normalX, int normalY> +void InnerCornerVelBM2D<T,DESCRIPTOR,normalX,normalY>::computeU ( + T u[DESCRIPTOR::d] ) const +{ + for (int iD=0; iD<DESCRIPTOR::d; ++iD) { + u[iD] = _u[iD]; + } +} + +template<typename T, typename DESCRIPTOR, + int normalX, int normalY> +void InnerCornerVelBM2D<T,DESCRIPTOR,normalX,normalY>::defineRho ( + Cell<T,DESCRIPTOR>& cell, T rho ) +{ } + +template<typename T, typename DESCRIPTOR, + int normalX, int normalY> +void InnerCornerVelBM2D<T,DESCRIPTOR,normalX,normalY>::defineU ( + Cell<T,DESCRIPTOR>& cell, + const T u[DESCRIPTOR::d] ) +{ + for (int iD=0; iD<DESCRIPTOR::d; ++iD) { + _u[iD] = u[iD]; + } +} + +template<typename T, typename DESCRIPTOR, + int normalX, int normalY> +void InnerCornerVelBM2D<T,DESCRIPTOR,normalX,normalY>::defineU ( + const T u[DESCRIPTOR::d] ) +{ + for (int iD=0; iD<DESCRIPTOR::d; ++iD) { + _u[iD] = u[iD]; + } +} + +template<typename T, typename DESCRIPTOR, + int normalX, int normalY> +void InnerCornerVelBM2D<T,DESCRIPTOR,normalX,normalY>::defineAllMomenta ( + Cell<T,DESCRIPTOR>& cell, + T rho, const T u[DESCRIPTOR::d], + const T pi[util::TensorVal<DESCRIPTOR >::n] ) +{ + for (int iD=0; iD<DESCRIPTOR::d; ++iD) { + _u[iD] = u[iD]; + } +} + +template<typename T, typename DESCRIPTOR, + int normalX, int normalY> +void InnerCornerVelBM2D<T,DESCRIPTOR,normalX,normalY>::computeStress ( + Cell<T,DESCRIPTOR> const& cell, + T rho, const T u[DESCRIPTOR::d], + T pi[util::TensorVal<DESCRIPTOR >::n] ) const +{ + typedef lbHelpers<T,DESCRIPTOR> lbH; + Cell<T,DESCRIPTOR> newCell(cell); + int v[DESCRIPTOR::d] = { -normalX, -normalY }; + int unknownF = util::findVelocity<DESCRIPTOR >(v); + + if (unknownF != DESCRIPTOR::q) { + int oppositeF = util::opposite<DESCRIPTOR >(unknownF); + + T uSqr = util::normSqr<T,DESCRIPTOR::d>(u); + + newCell[unknownF] = newCell[oppositeF] + - lbH::equilibrium(oppositeF, rho, u, uSqr) + + lbH::equilibrium(unknownF, rho, u, uSqr); + } + + lbH::computeStress(newCell, rho, u, pi); +} + + +} // namespace olb + +#endif |