latticePhysExternalParticleVelocity2D.hh

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/*  This file is part of the OpenLB library
 *
 *  Copyright (C) 2019 Albert Mink, Mathias J. Krause, Lukas Baron
 *  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 LATTICE_PHYS_EXTERNAL_PARTICLE_VELOCITY_2D_HH
#define LATTICE_PHYS_EXTERNAL_PARTICLE_VELOCITY_2D_HH
 
#include <vector>
#include "utilities/omath.h"
#include <limits>
 
#include "latticePhysExternalParticleVelocity2D.h"
#include "dynamics/lbm.h"  // for computation of lattice rho and velocity
#include "geometry/superGeometry.h"
#include "indicator/superIndicatorF2D.h"
#include "blockBaseF2D.h"
#include "functors/genericF.h"
#include "functors/analytical/analyticalF.h"
#include "functors/analytical/indicator/indicatorF2D.h"
#include "communication/mpiManager.h"
 
 
namespace olb {
 
template<typename T,typename DESCRIPTOR>
SuperLatticePhysExternalParticleVelocity2D<T,DESCRIPTOR>::SuperLatticePhysExternalParticleVelocity2D(
  SuperLattice<T,DESCRIPTOR>& sLattice, const UnitConverter<T,DESCRIPTOR>& converter)
  : SuperLatticePhysF2D<T,DESCRIPTOR>(sLattice, converter, 2)
{
  this->getName() = "ExtPartVelField";
 
  for (int iC = 0; iC < sLattice.getLoadBalancer().size(); ++iC) {
    this->_blockF.emplace_back(
      new BlockLatticePhysExternalParticleVelocity2D<T, DESCRIPTOR>(
        sLattice.getBlock(iC),
        converter)
    );
  }
}
 
template <typename T, typename DESCRIPTOR>
BlockLatticePhysExternalParticleVelocity2D<T,DESCRIPTOR>::BlockLatticePhysExternalParticleVelocity2D
(BlockLattice<T,DESCRIPTOR>& blockLattice, const UnitConverter<T,DESCRIPTOR>& converter)
  : BlockLatticePhysF2D<T,DESCRIPTOR>(blockLattice,converter,2)
{
  this->getName() = "ExtParticleVelocityField";
}
 
template <typename T, typename DESCRIPTOR>
bool BlockLatticePhysExternalParticleVelocity2D<T,DESCRIPTOR>::operator() (T output[], const int input[])
{
  auto velocity_numerator   = this->blockLattice.get(input).template getFieldPointer<descriptors::VELOCITY_NUMERATOR>();
  auto velocity_denominator = this->blockLattice.get(input).template getFieldPointer<descriptors::VELOCITY_DENOMINATOR>();
 
  if (velocity_denominator[0] > std::numeric_limits<T>::epsilon()) {
    output[0]=this->_converter.getPhysVelocity(velocity_numerator[0]/velocity_denominator[0]);
    output[1]=this->_converter.getPhysVelocity(velocity_numerator[1]/velocity_denominator[0]);
    return true;
  }
  output[0]=this->_converter.getPhysVelocity(velocity_numerator[0]);
  output[1]=this->_converter.getPhysVelocity(velocity_numerator[1]);
  return true;
}
 
}
#endif