diff options
Initialize at openlb-1-3
Diffstat (limited to 'src/boundary/advectionDiffusionMomentaOnBoundaries.hh')
-rw-r--r-- | src/boundary/advectionDiffusionMomentaOnBoundaries.hh | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/src/boundary/advectionDiffusionMomentaOnBoundaries.hh b/src/boundary/advectionDiffusionMomentaOnBoundaries.hh new file mode 100644 index 0000000..d5832be --- /dev/null +++ b/src/boundary/advectionDiffusionMomentaOnBoundaries.hh @@ -0,0 +1,175 @@ +/* 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 ADE_MOMENTA_ON_BOUNDARIES_HH +#define ADE_MOMENTA_ON_BOUNDARIES_HH + +#include <limits> +#include "advectionDiffusionMomentaOnBoundaries.h" +#include "dynamics/lbHelpers.h" +#include "dynamics/firstOrderLbHelpers.h" + +namespace olb { + +////////////////////// Class AdvectionDiffusionBM ////////////////////// + +template<typename T, typename DESCRIPTOR, int direction, int orientation> +RegularizedTemperatureBM<T,DESCRIPTOR,direction,orientation>::RegularizedTemperatureBM(const T temperature) : + AdvectionDiffusionBulkMomenta<T,DESCRIPTOR>(), + _temperature(temperature) +{ +} + +template<typename T, typename DESCRIPTOR, int direction, int orientation> +T RegularizedTemperatureBM<T,DESCRIPTOR,direction,orientation>::computeRho( Cell<T,DESCRIPTOR> const& cell ) const +{ + return _temperature; +} + +template<typename T, typename DESCRIPTOR, int direction, int orientation> +void RegularizedTemperatureBM<T,DESCRIPTOR,direction,orientation>::computeJ( Cell<T,DESCRIPTOR> const& cell, T j[DESCRIPTOR::d] ) const +{ + const T* u = cell.template getFieldPointer<descriptors::VELOCITY>(); + computeJneq( cell, j ); + + for (int iD=0; iD<DESCRIPTOR::d; ++iD) { + j[iD] += _temperature * u[iD]; + } +} + + +template<typename T, typename DESCRIPTOR, int direction, int orientation> +void RegularizedTemperatureBM<T,DESCRIPTOR,direction,orientation>::computeJneq( Cell<T,DESCRIPTOR> const& cell, T jNeq[DESCRIPTOR::d] ) const +{ + std::vector<int> const& onWallIndices = util::subIndex<DESCRIPTOR, direction, 0>(); + std::vector<int> const& normalIndices = util::subIndex<DESCRIPTOR, direction, orientation>(); + + const T* u = cell.template getFieldPointer<descriptors::VELOCITY>(); + + T jNeqOnWall[DESCRIPTOR::d], jNeqNormal[DESCRIPTOR::d]; + for (int iD=0; iD<DESCRIPTOR::d; ++iD) { + jNeqOnWall[iD] = T(); + jNeqNormal[iD] = T(); + } + + for (unsigned fIndex=0; fIndex<onWallIndices.size(); ++fIndex) { + for (int iD=0; iD<DESCRIPTOR::d; ++iD) { + jNeqOnWall[iD] += (cell[onWallIndices[fIndex]] - lbHelpers<T,DESCRIPTOR>::equilibriumFirstOrder(onWallIndices[fIndex],_temperature,u)) * descriptors::c<DESCRIPTOR>(onWallIndices[fIndex],iD); + } + } + + for (unsigned fIndex=0; fIndex<normalIndices.size(); ++fIndex) { + for (int iD=0; iD<DESCRIPTOR::d; ++iD) { + jNeqNormal[iD] += (cell[normalIndices[fIndex]]-lbHelpers<T,DESCRIPTOR>::equilibriumFirstOrder(normalIndices[fIndex],_temperature,u)) * descriptors::c<DESCRIPTOR>(normalIndices[fIndex],iD); + } + } + + for (int iD=0; iD<DESCRIPTOR::d; ++iD) { + jNeq[iD] = jNeqOnWall[iD] + (T)2 * jNeqNormal[iD]; + } +} + +template<typename T, typename DESCRIPTOR, int direction, int orientation> +void RegularizedTemperatureBM<T,DESCRIPTOR,direction,orientation>::defineRho( Cell<T,DESCRIPTOR>& cell, T rho ) +{ + _temperature = rho; +} + +template<typename T, typename DESCRIPTOR, int direction, int orientation> +void RegularizedTemperatureBM<T,DESCRIPTOR,direction,orientation>::defineRhoU( Cell<T,DESCRIPTOR>& cell, T rho, const T u[DESCRIPTOR::d]) +{ + _temperature = rho; + T *u_ = cell.template getFieldPointer<descriptors::VELOCITY>(); + for (int iD = 0; iD < DESCRIPTOR::d; ++iD) { + u_[iD] = u[iD]; + } + for (int iPop = 0; iPop < DESCRIPTOR::q; ++iPop) { + cell[iPop] = lbHelpers<T, DESCRIPTOR>::equilibriumFirstOrder( iPop, rho, u ); + } +} + + + + +template<typename T, typename DESCRIPTOR, int direction, int orientation> +RegularizedHeatFluxBM<T,DESCRIPTOR,direction,orientation>::RegularizedHeatFluxBM(T *heatFlux) : + AdvectionDiffusionBulkMomenta<T,DESCRIPTOR>() +{ + for (int iDim = 0; iDim < DESCRIPTOR::d; iDim++) { + if (heatFlux == nullptr) + _heatFlux[iDim] = T(); + else + _heatFlux[iDim] = heatFlux[iDim]; + } +} + +template<typename T, typename DESCRIPTOR, int direction, int orientation> +T RegularizedHeatFluxBM<T,DESCRIPTOR,direction,orientation>::computeRho( Cell<T,DESCRIPTOR> const& cell ) const +{ + std::vector<int> const& onWallIndices = util::subIndex<DESCRIPTOR, direction, 0>(); + std::vector<int> const& normalIndices = util::subIndex<DESCRIPTOR, direction, orientation>(); + const T* u = cell.template getFieldPointer<descriptors::VELOCITY>(); + + T rhoOnWall = T(); + for (unsigned fIndex=0; fIndex<onWallIndices.size(); ++fIndex) { + rhoOnWall += cell[onWallIndices[fIndex]]; + } + + T rhoNormal = T(); + for (unsigned fIndex=0; fIndex<normalIndices.size(); ++fIndex) { + rhoNormal += cell[normalIndices[fIndex]]; + } + + T rho =((T)2*rhoNormal+rhoOnWall+(T)1 - (T)orientation*_heatFlux[direction]) / + ((T)1+(T)orientation*u[direction]); + + return rho; +} + +template<typename T, typename DESCRIPTOR, int direction, int orientation> +void RegularizedHeatFluxBM<T,DESCRIPTOR,direction,orientation>::computeJ( Cell<T,DESCRIPTOR> const& cell, T j[DESCRIPTOR::d] ) const +{ + T temperature = computeRho(cell); + const T* u = cell.template getFieldPointer<descriptors::VELOCITY>(); + + for (int iD=0; iD<DESCRIPTOR::d; ++iD) { + j[iD] = _heatFlux[iD] + temperature * u[iD]; + } +} + + +template<typename T, typename DESCRIPTOR, int direction, int orientation> +void RegularizedHeatFluxBM<T,DESCRIPTOR,direction,orientation>::computeJneq( Cell<T,DESCRIPTOR> const& cell, T jNeq[DESCRIPTOR::d] ) const +{ + for (int iD=0; iD<DESCRIPTOR::d; ++iD) { + jNeq[iD] = _heatFlux[iD]; + } +} + + +} // namespace olb + +#endif |