rtlbmDynamics.h

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/*  This file is part of the OpenLB library
 *
 *  Copyright (C) 2017 Albert Mink, Christopher McHardy
 *  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.
*/
 
#ifndef RTLBM_DYNAMICS_H
#define RTLBM_DYNAMICS_H
 
#include "dynamics/dynamics.h"
 
namespace olb {
 
 
 
template<typename T, typename DESCRIPTOR, typename MOMENTA=momenta::BulkTuple>
class RTLBMdynamicsMcHardy : public legacy::BasicDynamics<T,DESCRIPTOR,MOMENTA> {
public:
  template<typename M>
  using exchange_momenta = RTLBMdynamicsMcHardy<T,DESCRIPTOR,M>;
 
 
  RTLBMdynamicsMcHardy( T latticeAbsorption, T latticeScattering, std::array<std::array<T,DESCRIPTOR::q>, DESCRIPTOR::q>& anisoMatrix );
  T computeEquilibrium( int iPop, T rho, const T u[DESCRIPTOR::d], T uSqr ) const override;
  CellStatistic<T> collide( Cell<T,DESCRIPTOR>& cell, LatticeStatistics<T>& statistics ) override;
  T getOmega() const;
  void setOmega( T omega );
  T getSink() const;
 
protected:
  T _absorption;
  T _scattering;
  std::array<std::array<T,DESCRIPTOR::q>, DESCRIPTOR::q>& _anisoMatrix;
};
 
template<typename T, typename DESCRIPTOR, typename MOMENTA=momenta::BulkTuple>
class RTLBMdynamicsMcHardyRK : public legacy::BasicDynamics<T,DESCRIPTOR,MOMENTA> {
public:
  static_assert(DESCRIPTOR::template provides<descriptors::tag::RTLBM>(), "Must be RTLBM");
 
  template<typename M>
  using exchange_momenta = RTLBMdynamicsMcHardyRK<T,DESCRIPTOR,M>;
 
  RTLBMdynamicsMcHardyRK( T latticeAbsorption, T latticeScattering, std::array<std::array<T,DESCRIPTOR::q>, DESCRIPTOR::q>& anisoMatrix );
  T computeEquilibrium( int iPop, T rho, const T u[DESCRIPTOR::d], T uSqr ) const override;
  CellStatistic<T> collide( Cell<T,DESCRIPTOR>& cell, LatticeStatistics<T>& statistics ) override;
  T getOmega() const;
  void setOmega( T omega );
private:
  void computeEquilibriumAniso( Cell<T,DESCRIPTOR>& cell, std::array<T,DESCRIPTOR::q>& feq );
  std::array<T,DESCRIPTOR::q> doCollision( Cell<T,DESCRIPTOR>& cell, std::array<T,DESCRIPTOR::q>& feq );
  T _absorption;
  T _scattering;
  std::array<std::array<T,DESCRIPTOR::q>, DESCRIPTOR::q>& _anisoMatrix;
};
 
 
}  // namespace olb
 
#endif