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/* This file is part of the OpenLB library
*
* Copyright (C) 2016 Thomas Henn
* 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.
*/
/* Formulation of Stokes drag force (6 pi mu r_p v_rel)
* for actual time step with particle velocity of the last time step
* with implicit Euler method. For more information see
* paper of Thomas Henn: "Parallel dilute particulate flow simulations
* in the human nasal cavity", Computers & Fluids, 2016.
**/
#ifndef STOKESDRAGFORCE_3D_H
#define STOKESDRAGFORCE_3D_H
#include "functors/lattice/superLatticeLocalF3D.h"
#include "particles/particleSystem3D.h"
#include "force3D.h"
namespace olb {
template<typename T, template<typename U> class PARTICLETYPE>
class ParticleSystem3D;
template<typename T, template<typename U> class PARTICLETYPE, typename DESCRIPTOR>
class StokesDragForce3D : public Force3D<T, PARTICLETYPE> {
public:
/// Constructor, FluidVelocity, physicalTimeStep, physicalDynamicViscosity
StokesDragForce3D(SuperLatticeInterpPhysVelocity3D<T, DESCRIPTOR>& getVel, T dT, T mu);
/// Constructor using values from converter
StokesDragForce3D(SuperLatticeInterpPhysVelocity3D<T, DESCRIPTOR>& getVel, UnitConverter<T, DESCRIPTOR> const& converter);
/// Constructor using values from converter
StokesDragForce3D(SuperLatticeInterpPhysVelocity3D<T, DESCRIPTOR>& getVel, UnitConverter<T, DESCRIPTOR> const& converter, T scaleFactor);
/// Destructor
~StokesDragForce3D() override {}
void applyForce(typename std::deque<PARTICLETYPE<T> >::iterator p,
int pInt, ParticleSystem3D<T, PARTICLETYPE>& psSys) override;
/// Compute Force for subgrid scale particles
void computeForce(int pInt, ParticleSystem3D<T, PARTICLETYPE>* psSys,
T force[3]);
private:
SuperLatticeInterpPhysVelocity3D<T, DESCRIPTOR>& _getVel;
T _C1; // helperVariable
T _mu; // dynamic viscosity
T _dTinv; // inverse timestep
T _scaleFactor;
};
}
#endif /* STOKESDRAGFORCE_3D_H */
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