latticePhysDissipation2D.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_DISSIPATION_2D_HH
#define LATTICE_PHYS_DISSIPATION_2D_HH
 
#include <vector>
#include "utilities/omath.h"
#include <limits>
 
#include "latticePhysDissipation2D.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>
SuperLatticePhysDissipation2D<T,DESCRIPTOR>::SuperLatticePhysDissipation2D(
  SuperLattice<T,DESCRIPTOR>& sLattice, const UnitConverter<T,DESCRIPTOR>& converter)
  : SuperLatticePhysF2D<T,DESCRIPTOR>(sLattice, converter, 1)
{
  this->getName() = "physDissipation";
  int maxC = this->_sLattice.getLoadBalancer().size();
  this->_blockF.reserve(maxC);
  for (int iC = 0; iC < maxC; iC++) {
    this->_blockF.emplace_back(new BlockLatticePhysDissipation2D<T,DESCRIPTOR>(this->_sLattice.getBlock(iC),this->_converter));
  }
}
 
template <typename T, typename DESCRIPTOR>
BlockLatticePhysDissipation2D<T,DESCRIPTOR>::BlockLatticePhysDissipation2D
(BlockLattice<T,DESCRIPTOR>& blockLattice, const UnitConverter<T,DESCRIPTOR>& converter)
  : BlockLatticePhysF2D<T,DESCRIPTOR>(blockLattice,converter,1)
{
  this->getName() = "physDissipation";
}
 
template <typename T, typename DESCRIPTOR>
bool BlockLatticePhysDissipation2D<T,DESCRIPTOR>::operator() (T output[], const int input[])
{
  T rho, uTemp[DESCRIPTOR::d], pi[util::TensorVal<DESCRIPTOR >::n];
  this->_blockLattice.get( input[0], input[1] ).computeAllMomenta(rho, uTemp, pi);
 
  T PiNeqNormSqr = pi[0]*pi[0] + 2.*pi[1]*pi[1] + pi[2]*pi[2];
  if (util::TensorVal<DESCRIPTOR >::n == 6) {
    PiNeqNormSqr += pi[2]*pi[2] + pi[3]*pi[3] + 2.*pi[4]*pi[4] + pi[5]*pi[5];
  }
 
  T nuLattice = this->_converter.getLatticeViscosity();
  T omega = 1. / this->_converter.getLatticeRelaxationTime();
  T dt = this->_converter.getConversionFactorTime();
  output[0] = PiNeqNormSqr*nuLattice*util::pow(omega*descriptors::invCs2<T,DESCRIPTOR>()/rho,2)/2.*this->_converter.getPhysViscosity()/this->_converter.getLatticeViscosity()/dt/dt;
 
  return true;
}
 
}
#endif