extendedFiniteDifferenceBoundary2D.h

Go to the documentation of this file.

/*  This file is part of the OpenLB library
 *
 *  Copyright (C) 2007 Orestis Malaspinas, 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.
*/
 
 
#ifndef EXTENDED_FINITE_DIFFERENCE_BOUNDARY_2D_H
#define EXTENDED_FINITE_DIFFERENCE_BOUNDARY_2D_H
 
#include "core/postProcessing.h"
#include "dynamics/momenta/aliases.h"
 
 
namespace olb {
 
template<typename T, typename DESCRIPTOR, int direction, int orientation>
class ExtendedStraightFdBoundaryPostProcessor2D : public LocalPostProcessor2D<T,DESCRIPTOR> {
public:
  ExtendedStraightFdBoundaryPostProcessor2D(int x0_, int x1_, int y0_, int y1_);
  int extent() const override
  {
    return 1;
  }
  int extent(int whichDirection) const override
  {
    return 1;
  }
  void process(BlockLattice<T,DESCRIPTOR>& blockLattice) override;
  void processSubDomain(BlockLattice<T,DESCRIPTOR>& blockLattice,
                        int x0_, int x1_, int y0_, int y1_ ) override;
private:
  template<int deriveDirection>
  void interpolateGradients(BlockLattice<T,DESCRIPTOR> const& blockLattice,
                            T velDeriv[DESCRIPTOR::d], int iX, int iY) const;
  template<int deriveDirection>
  void interpolateGradients (
    BlockLattice<T,DESCRIPTOR> const& blockLattice,T& rhoDeriv,
    int iX, int iY ) const;
private:
  int x0, x1, y0, y1;
};
 
template<typename T, typename DESCRIPTOR, int direction, int orientation>
class ExtendedStraightFdBoundaryProcessorGenerator2D : public PostProcessorGenerator2D<T,DESCRIPTOR> {
public:
  ExtendedStraightFdBoundaryProcessorGenerator2D(int x0_, int x1_, int y0_, int y1_);
  PostProcessor2D<T,DESCRIPTOR>* generate() const override;
  PostProcessorGenerator2D<T,DESCRIPTOR>*  clone() const override;
};
 
}  // namespace olb
 
#endif