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/* This file is part of the OpenLB library
*
* Copyright (C) 2008 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.
*/
/** \file
* BGK Dynamics with adjustable speed of sound -- header file.
*/
#ifndef CHOPARD_DYNAMICS_H
#define CHOPARD_DYNAMICS_H
#include "dynamics/dynamics.h"
#include "core/cell.h"
namespace olb {
/// Implementation of the BGK collision step
template<typename T, typename DESCRIPTOR>
class ChopardDynamics : public BasicDynamics<T,DESCRIPTOR> {
public:
/// Constructor
ChopardDynamics(T vs2_, T omega_, Momenta<T,DESCRIPTOR>& momenta_);
ChopardDynamics(T omega_, Momenta<T,DESCRIPTOR>& momenta_);
/// Compute equilibrium distribution function
T computeEquilibrium(int iPop, T rho, const T u[DESCRIPTOR::d], T uSqr) const override;
/// Collision step
void collide(Cell<T,DESCRIPTOR>& cell,
LatticeStatistics<T>& statistics_) override;
/// Get local relaxation parameter of the dynamics
T getOmega() const override;
/// Set local relaxation parameter of the dynamics
void setOmega(T omega_) override;
/// Set local speed of sound
void setVs2(T vs2_);
/// Get local speed of sound
T getVs2() const;
public:
static T chopardBgkCollision (
Cell<T,DESCRIPTOR>& cell, T rho, const T u[DESCRIPTOR::d], T vs2, T omega);
static T chopardEquilibrium (
int iPop, T rho, const T u[DESCRIPTOR::d], T uSqr, T vs2 );
private:
T vs2; ///< speed of sound
T omega; ///< relaxation parameter
};
}
#endif
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