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/* Lattice Boltzmann sample, written in C++, using the OpenLB
* library
*
* Copyright (C) 2019 Davide Dapelo
* 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.
*/
/* Models for Lagrangian forward-coupling methods -- generic implementation.
*/
#ifndef LB_FORWARD_COUPLING_MODELS_HH
#define LB_FORWARD_COUPLING_MODELS_HH
namespace olb {
////////////////////// Class LocalBaseCouplingModel ////////////////////////
template<typename T, typename Lattice, template<typename V> class Particle>
LocalBaseForwardCouplingModel<T,Lattice,Particle>::LocalBaseForwardCouplingModel (
UnitConverter<T, Lattice>& converter,
SuperLattice3D<T, Lattice>& sLattice,
SuperGeometry3D<T>& sGeometry,
DragModel<T, Particle>& dragModel )
: _sGeometry(sGeometry),
_converter(converter),
_sLattice(sLattice),
_dragModel(dragModel)
{
this->_interpLatticeDensity = std::make_shared<SuperLatticeInterpDensity3Degree3D<T, Lattice> > (
this->_sLattice, _sGeometry, this->_converter );
this->_interpLatticeVelocity = std::make_shared<SuperLatticeInterpPhysVelocity3D<T, Lattice> > (
this->_sLattice, this->_converter );
}
template<typename T, typename Lattice, template<typename V> class Particle>
bool LocalBaseForwardCouplingModel<T,Lattice,Particle>::operator() (Particle<T>* p, int globic)
{
/// Getting the particle and its containing cell's position
T physPosP[3] = {T(), T(), T()}; // particle's physical position
physPosP[0] = (p->getPos()[0]);
physPosP[1] = (p->getPos()[1]);
physPosP[2] = (p->getPos()[2]);
// particle's dimensionless position, rounded at neighbouring voxel
int latticeRoundedPosP[3] = {0, 0, 0};
this->_sLattice.getCuboidGeometry().get(globic).getLatticeR (
latticeRoundedPosP, physPosP );
// { globic, latticeRoundedP[0, ..., 2] }
int globicFull[4] = { globic,
latticeRoundedPosP[0],
latticeRoundedPosP[1],
latticeRoundedPosP[2] };
// Particle's velocity
T physVelP[3] = {T(), T(), T()}; // Physical
physVelP[0] = (p->getVel()[0]);
physVelP[1] = (p->getVel()[1]);
physVelP[2] = (p->getVel()[2]);
// Lattice
T latticeVelP[3] = {T(), T(), T()}; // particle's dimensionless velocity
latticeVelP[0] = this->_converter.getLatticeVelocity(physVelP[0]);
latticeVelP[1] = this->_converter.getLatticeVelocity(physVelP[1]);
latticeVelP[2] = this->_converter.getLatticeVelocity(physVelP[2]);
// Lattice's velocity at particle's location
T physVelF[3] = {T(), T(), T()}; // Physical
this->_interpLatticeVelocity->operator() (physVelF, physPosP, globic);
// Lattice
T latticeVelF[3] = {T(), T(), T()}; // Lattice's dimensionless velocity at particle's location
latticeVelF[0] = this->_converter.getLatticeVelocity(physVelF[0]);
latticeVelF[1] = this->_converter.getLatticeVelocity(physVelF[1]);
latticeVelF[2] = this->_converter.getLatticeVelocity(physVelF[2]);
// Computing fluid-particle momentum transfer
T gF[3] = {T(), T(), T()}; // force density gF
this->_momentumExchange->operator() ( gF, latticeVelF, latticeVelP,
physPosP, latticeRoundedPosP, globic);
// Computing drag coefficient
T Cd = this->_dragModel(p, latticeVelF, latticeVelP, globicFull);
/// Computing drag force in dimensionless units
T latticePRad = p->getRad() / _converter.getConversionFactorLength();
T latticeForceP[3] = {T(), T(), T()}; // dimensionless force acting on the particle
latticeForceP[0] = .5 * Cd * M_PI*pow(latticePRad,2) * gF[0] * (latticeVelF[0] - latticeVelP[0]);
latticeForceP[1] = .5 * Cd * M_PI*pow(latticePRad,2) * gF[1] * (latticeVelF[1] - latticeVelP[1]);
latticeForceP[2] = .5 * Cd * M_PI*pow(latticePRad,2) * gF[2] * (latticeVelF[2] - latticeVelP[2]);
/// Computing physical drag force
std::vector<T> physForceP(3, T()); // physical force acting on the particle
physForceP[0] = latticeForceP[0] * this->_converter.getConversionFactorForce();
physForceP[1] = latticeForceP[1] * this->_converter.getConversionFactorForce();
physForceP[2] = latticeForceP[2] * this->_converter.getConversionFactorForce();
/// Updating the particle
p->setStoreForce(physForceP);
return true;
}
////////////////////// Class NaiveForwardCouplingModel ////////////////////////
template<typename T, typename Lattice, template<typename V> class Particle>
NaiveForwardCouplingModel<T,Lattice,Particle>::NaiveForwardCouplingModel (
UnitConverter<T, Lattice>& converter,
SuperLattice3D<T, Lattice>& sLattice,
SuperGeometry3D<T>& sGeometry,
DragModel<T, Particle>& dragModel )
: LocalBaseForwardCouplingModel<T,Lattice,Particle>(converter, sLattice, sGeometry, dragModel)
{
this->_momentumExchange = std::make_shared<NaiveMomentumExchange<T, Lattice> > (
this->_converter, this->_sLattice, this->_interpLatticeDensity );
}
////////////////////// Class LaddForwardCouplingModel ////////////////////////
template<typename T, typename Lattice, template<typename V> class Particle>
LaddForwardCouplingModel<T,Lattice,Particle>::LaddForwardCouplingModel (
UnitConverter<T, Lattice>& converter,
SuperLattice3D<T, Lattice>& sLattice,
SuperGeometry3D<T>& sGeometry,
DragModel<T, Particle>& dragModel )
: LocalBaseForwardCouplingModel<T,Lattice,Particle>(converter, sLattice, sGeometry, dragModel)
{
this->_momentumExchange = std::make_shared<LaddMomentumExchange<T, Lattice> > (
this->_converter, this->_sLattice,
this->_interpLatticeDensity, this->_interpLatticeVelocity );
}
////////////////////// Class NonLocalBaseCouplingModel ////////////////////////
template<typename T, typename Lattice, template<typename V> class Particle>
NonLocalBaseForwardCouplingModel<T,Lattice,Particle>::NonLocalBaseForwardCouplingModel (
UnitConverter<T, Lattice>& converter,
SuperLattice3D<T, Lattice>& sLattice,
SuperGeometry3D<T>& sGeometry,
DragModel<T, Particle>& dragModel,
SmoothingFunctional<T, Lattice>& smoothingFunctional )
: _sGeometry(sGeometry),
_converter(converter),
_sLattice(sLattice),
_dragModel(dragModel),
_smoothingFunctional(smoothingFunctional)
{
this->_interpLatticeDensity = std::make_shared<SuperLatticeInterpDensity3Degree3D<T, Lattice> > (
this->_sLattice, _sGeometry, this->_converter );
this->_interpLatticeVelocity = std::make_shared<SuperLatticeInterpPhysVelocity3D<T, Lattice> > (
this->_sLattice, this->_converter );
}
template<typename T, typename Lattice, template<typename V> class Particle>
bool NonLocalBaseForwardCouplingModel<T,Lattice,Particle>::operator() (Particle<T>* p, int globic)
{
/// Getting the particle and its containing cell's position
T physPosP[3] = {T(), T(), T()}; // particle's physical position
physPosP[0] = (p->getPos()[0]);
physPosP[1] = (p->getPos()[1]);
physPosP[2] = (p->getPos()[2]);
//std::cout << "globic=" << globic << " physPosP=(" << physPosP[0] << ", " << physPosP[1] << ", " << physPosP[2] << ")" << std::endl; // <---
// particle's dimensionless position, rounded at neighbouring voxel
int latticeRoundedPosP[3] = {0, 0, 0};
this->_sLattice.getCuboidGeometry().get(globic).getLatticeR (
latticeRoundedPosP, physPosP );
</
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