setWallFunctionBoundary3D.hh

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/*  This file is part of the OpenLB library
 *
 *  Copyright (C) 2020 Alexander Schulz
 *  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.
*/
 
//This file contains the WallFunctionBoundary
//This is a new version of the Boundary, which only contains free floating functions
#ifndef SET_WALL_FUNCTION_BOUNDARY_3D_HH
#define SET_WALL_FUNCTION_BOUNDARY_3D_HH
 
#include "setWallFunctionBoundary3D.h"
 
namespace olb {
 
template<typename T, typename DESCRIPTOR>
void setWallFunctionBoundary(SuperLattice<T, DESCRIPTOR>& sLattice, SuperGeometry<T,3>& superGeometry, int material,
                             UnitConverter<T, DESCRIPTOR> const& converter,
                             wallFunctionParam<T> const& wallFunctionParam,
                             IndicatorF3D<T>* geoIndicator)
{
  setWallFunctionBoundary<T,DESCRIPTOR>(sLattice, superGeometry.getMaterialIndicator(material),
                                        converter, wallFunctionParam, geoIndicator);
}
 
template<typename T, typename DESCRIPTOR>
void setWallFunctionBoundary(SuperLattice<T, DESCRIPTOR>& sLattice, FunctorPtr<SuperIndicatorF3D<T>>&& indicator,
                             UnitConverter<T, DESCRIPTOR> const& converter,
                             wallFunctionParam<T> const& wallFunctionParam,
                             IndicatorF3D<T>* geoIndicator)
{
  int _overlap = 1;
  bool includeOuterCells = false;
  OstreamManager clout(std::cout, "setWallFunctionBoundary");
  if (indicator->getSuperGeometry().getOverlap() == 1) {
    includeOuterCells = true;
    clout << "WARNING: overlap == 1, boundary conditions set on overlap despite unknown neighbor materials" << std::endl;
  }
  for (int iCloc = 0; iCloc < sLattice.getLoadBalancer().size(); ++iCloc) {
    setWallFunctionBoundary<T,DESCRIPTOR>(sLattice.getBlock(iCloc),
        indicator->getBlockIndicatorF(iCloc),
        converter, wallFunctionParam, geoIndicator, includeOuterCells);
  }
  addPoints2CommBC(sLattice, std::forward<decltype(indicator)>(indicator), _overlap);
 
}
 
 
template<typename T, typename DESCRIPTOR>
void setWallFunctionBoundary(BlockLattice<T,DESCRIPTOR>& _block, BlockIndicatorF3D<T>& indicator,
                             UnitConverter<T, DESCRIPTOR> const& converter,
                             wallFunctionParam<T> const& wallFunctionParam,
                             IndicatorF3D<T>*            geoIndicator,
                             bool includeOuterCells)
{
  OstreamManager clout(std::cout, "setWallFunctionBoundary");
  bool _output = false;
  const auto& blockGeometryStructure = indicator.getBlockGeometry();
  const int margin = includeOuterCells ? 0 : 1;
  std::vector<int> discreteNormal(4, 0);
  blockGeometryStructure.forSpatialLocations([&](auto iX, auto iY, auto iZ) {
    if (blockGeometryStructure.getNeighborhoodRadius({iX, iY, iZ}) >= margin
        && indicator(iX, iY, iZ)) {
      discreteNormal = blockGeometryStructure.getStatistics().getType(iX, iY, iZ);
      std::vector<int> missingIndices;
      for (int x = -1 ; x < 2; ++x) {
        for (int y = -1 ; y < 2; ++y) {
          for (int z = -1 ; z < 2; ++z) {
            if (blockGeometryStructure.getMaterial(iX + x, iY + y, iZ + z) == 0) {
              for (int iPop = 0; iPop < DESCRIPTOR::q; ++iPop) {
                if (descriptors::c<DESCRIPTOR>(iPop,0) == x &&
                    descriptors::c<DESCRIPTOR>(iPop,1) == y &&
                    descriptors::c<DESCRIPTOR>(iPop,2) == z) {
                  missingIndices.push_back(descriptors::opposite<DESCRIPTOR>(iPop));
                }
              }
            }
          }
        }
      }
      if (discreteNormal[1]!=0 || discreteNormal[2]!=0 || discreteNormal[3]!=0) {
        discreteNormal.erase(discreteNormal.begin());
        //OLB_PRECONDITION(x0==x1 || y0==y1 || z0==z1);
        if (_output) {
          clout << "setWallFunctionBoundary<" << discreteNormal[0] << ","<< discreteNormal[1] << ","<< discreteNormal[2] << ">("  << iX << ", "<< iX << ", " << iY << ", " << iY << ", " << iZ << ", " << iZ << " )" << std::endl;
        }
        auto postProcessor = std::unique_ptr<PostProcessorGenerator3D<T, DESCRIPTOR>>{ new WallFunctionBoundaryProcessorGenerator3D<T, DESCRIPTOR>(iX, iX, iY, iY, iZ, iZ, indicator.getBlockGeometry(), discreteNormal, missingIndices,
            converter, wallFunctionParam, geoIndicator) };
        if (postProcessor) {
          _block.addPostProcessor(*postProcessor);
        }
      }
      else {
        clout << "Warning: Could not setWallFunctionBoundary (" << iX << ", " << iY << ", " << iZ << "), discreteNormal=(" << discreteNormal[0] <<","<< discreteNormal[1] <<","<< discreteNormal[2] <<","<< discreteNormal[3] <<"), set to bounceBack" << std::endl;
        _block.template defineDynamics<BounceBack>({iX, iY, iZ});
      }
    }
  });
}
 
 
} //namespace olb
 
 
#endif