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+/*  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