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Diffstat (limited to 'src/particles/forces/buoyancyForce3D.hh')
-rw-r--r-- | src/particles/forces/buoyancyForce3D.hh | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/src/particles/forces/buoyancyForce3D.hh b/src/particles/forces/buoyancyForce3D.hh new file mode 100644 index 0000000..b05dada --- /dev/null +++ b/src/particles/forces/buoyancyForce3D.hh @@ -0,0 +1,67 @@ +/* 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 */ |