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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.
*/
#ifndef BUOYANCYFORCE_3D_HH
#define BUOYANCYFORCE_3D_HH
#include <cmath>
#include "buoyancyForce3D.h"
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
namespace olb {
template<typename T, template<typename U> class PARTICLETYPE, typename DESCRIPTOR>
BuoyancyForce3D<T, PARTICLETYPE, DESCRIPTOR>::BuoyancyForce3D(
UnitConverter<T,DESCRIPTOR> const& converter,
std::vector<T> direction, T g) :
Force3D<T, PARTICLETYPE>(),
_direction(direction), _g(g), _physDensity(converter.getPhysDensity() )
{
T directionNorm = sqrt(
pow(_direction[0], 2.) + pow(_direction[1], 2.)
+ pow(_direction[2], 2.));
for (int i = 0; i < 3; ++i) {
_direction[i] /= directionNorm;
}
}
template<typename T, template<typename U> class PARTICLETYPE, typename DESCRIPTOR>
void BuoyancyForce3D<T, PARTICLETYPE, DESCRIPTOR>::applyForce(
typename std::deque<PARTICLETYPE<T> >::iterator p, int pInt,
ParticleSystem3D<T, PARTICLETYPE>& psSys)
{
// weight force of fluid in similar volume like particle that replaces the fluid
// acts in direction opposite to weight force of particle
T factor = 4. / 3. * M_PI * std::pow(p->getRad(), 3) * _g
* _physDensity;
for (int j = 0; j < 3; ++j) {
p->getForce()[j] -= factor * _direction[j];
}
}
}
#endif /* BUOYANCYFORCE_3D_HH */
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