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/* This file is part of the OpenLB library
*
* Copyright (C) 2008 Orestis Malaspinas, Andrea Parmigiani
* 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.
*/
/** \file
* A collection of dynamics classes (e.g. BGK) with which a Cell object
* can be instantiated -- generic implementation.
*/
#ifndef POROUS_ADVECTION_DIFFUSION_DYNAMICS_HH
#define POROUS_ADVECTION_DIFFUSION_DYNAMICS_HH
#include <algorithm>
#include <limits>
#include "porousAdvectionDiffusionDynamics.h"
#include "core/util.h"
#include "lbHelpers.h"
namespace olb {
//==================================================================//
//========== BGK Model for porous Advection diffusion=======//
//==================================================================//
template<typename T, typename DESCRIPTOR>
PorousAdvectionDiffusionBGKdynamics<T, DESCRIPTOR>::PorousAdvectionDiffusionBGKdynamics (
T omega, Momenta<T, DESCRIPTOR>& momenta, T tSolid )
: BasicDynamics<T, DESCRIPTOR>( momenta ),
_omega(omega), _tSolid(tSolid)
{ }
template<typename T, typename DESCRIPTOR>
PorousAdvectionDiffusionBGKdynamics<T, DESCRIPTOR>::PorousAdvectionDiffusionBGKdynamics (
const UnitConverter<T,DESCRIPTOR>& converter, Momenta<T, DESCRIPTOR>& momenta, T tSolid )
: BasicDynamics<T, DESCRIPTOR>( momenta ),
_omega(converter.getLatticeRelaxationFrequency()), _tSolid(tSolid)
{ }
template<typename T, typename DESCRIPTOR>
T PorousAdvectionDiffusionBGKdynamics<T, DESCRIPTOR>::computeEquilibrium( int iPop, T rho,
const T u[DESCRIPTOR::d], T uSqr ) const
{
// does temperature need to be considered here?
return lbHelpers<T, DESCRIPTOR>::equilibriumFirstOrder( iPop, rho, u );
}
template<typename T, typename DESCRIPTOR>
void PorousAdvectionDiffusionBGKdynamics<T, DESCRIPTOR>::collide( Cell<T, DESCRIPTOR>& cell,
LatticeStatistics<T>& statistics )
{
T temperature = this->_momenta.computeRho( cell );
// apply temperature scaling
T* porosity = cell.template getFieldPointer<descriptors::POROSITY>();
temperature = scaleTemp(temperature, porosity[0]);
const T* u = cell.template getFieldPointer<descriptors::VELOCITY>();
T uSqr = lbHelpers<T, DESCRIPTOR>::
bgkCollision( cell, temperature, u, _omega );
statistics.incrementStats( temperature, uSqr );
}
template<typename T, typename DESCRIPTOR>
T PorousAdvectionDiffusionBGKdynamics<T, DESCRIPTOR>::getOmega() const
{
return _omega;
}
template<typename T, typename DESCRIPTOR>
void PorousAdvectionDiffusionBGKdynamics<T, DESCRIPTOR>::setOmega( T omega )
{
_omega = omega;
}
template<typename T, typename DESCRIPTOR>
T PorousAdvectionDiffusionBGKdynamics<T,DESCRIPTOR>::computeRho(const Cell<T,DESCRIPTOR>& cell) const
{
//T rho = this->_momenta.computeRho(cell);
//const T* porosity = cell.template getFieldPointer<descriptors::POROSITY>();
//return scaleTemp(rho, porosity[0]);
return this->_momenta.computeRho(cell);
}
template<typename T, typename DESCRIPTOR>
T PorousAdvectionDiffusionBGKdynamics<T,DESCRIPTOR>::scaleTemp(const T temp, const T porosity) const
{
T rho = porosity * temp + ( T(1) - porosity ) * _tSolid;
return rho;
}
} // namespace olb
#endif
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