/usr/include/palabos/offLattice/bouzidiOffLatticeModel3D.hh is in libplb-dev 1.5~r1+repack1-3.
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*
* Copyright (C) 2011-2015 FlowKit Sarl
* Route d'Oron 2
* 1010 Lausanne, Switzerland
* E-mail contact: contact@flowkit.com
*
* The most recent release of Palabos can be downloaded at
* <http://www.palabos.org/>
*
* The library Palabos is free software: you can redistribute it and/or
* modify it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* The library 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef BOUZIDI_OFF_LATTICE_MODEL_3D_HH
#define BOUZIDI_OFF_LATTICE_MODEL_3D_HH
#include "offLattice/bouzidiOffLatticeModel3D.h"
#include "latticeBoltzmann/geometricOperationTemplates.h"
#include "latticeBoltzmann/externalFieldAccess.h"
#include <algorithm>
#include <vector>
#include <cmath>
namespace plb {
template<typename T, template<typename U> class Descriptor>
BouzidiOffLatticeModel3D<T,Descriptor>::BouzidiOffLatticeModel3D (
BoundaryShape3D<T,Array<T,3> >* shape_, int flowType_)
: OffLatticeModel3D<T,Array<T,3> >(shape_, flowType_),
computeStat(true)
{
typedef Descriptor<T> D;
invAB.resize(D::q);
invAB[0] = T();
for (plint iPop=1; iPop<D::q; ++iPop) {
invAB[iPop] = (T)1 / std::sqrt(util::sqr(D::c[iPop][0])+util::sqr(D::c[iPop][1])+util::sqr(D::c[iPop][2]));
}
}
template<typename T, template<typename U> class Descriptor>
BouzidiOffLatticeModel3D<T,Descriptor>* BouzidiOffLatticeModel3D<T,Descriptor>::clone() const {
return new BouzidiOffLatticeModel3D(*this);
}
template<typename T, template<typename U> class Descriptor>
plint BouzidiOffLatticeModel3D<T,Descriptor>::getNumNeighbors() const {
return 1;
}
template<typename T, template<typename U> class Descriptor>
void BouzidiOffLatticeModel3D<T,Descriptor>::prepareCell (
Dot3D const& cellLocation,
AtomicContainerBlock3D& container )
{
typedef Descriptor<T> D;
Dot3D offset = container.getLocation();
BouzidiOffLatticeInfo3D* info =
dynamic_cast<BouzidiOffLatticeInfo3D*>(container.getData());
PLB_ASSERT( info );
std::vector<int> solidDirections;
std::vector<plint> boundaryIds;
std::vector<bool> hasFluidNeighbor;
if (this->isFluid(cellLocation+offset)) {
for (plint iPop=1; iPop<D::q; ++iPop) {
Dot3D neighbor(cellLocation.x+D::c[iPop][0], cellLocation.y+D::c[iPop][1], cellLocation.z+D::c[iPop][2]);
Dot3D prevNode(cellLocation.x-D::c[iPop][0], cellLocation.y-D::c[iPop][1], cellLocation.z-D::c[iPop][2]);
// If the fluid node has a non-fluid neighbor ...
if (!this->isFluid(neighbor+offset)) {
plint iTriangle=-1;
global::timer("intersect").start();
Array<T,3> locatedPoint;
T distance;
Array<T,3> wallNormal;
Array<T,3> surfaceData;
OffBoundary::Type bdType;
#ifdef PLB_DEBUG
bool ok =
#endif
this->pointOnSurface (
cellLocation+offset, Dot3D(D::c[iPop][0],D::c[iPop][1],D::c[iPop][2]), locatedPoint, distance,
wallNormal, surfaceData, bdType, iTriangle );
// In the following, the importance of directions is sorted wrt. how well they
// are aligned with the wall normal. It is better to take the continuous normal,
// because it is not sensitive to the choice of the triangle when we shoot at
// an edge.
global::timer("intersect").stop();
PLB_ASSERT( ok );
// ... then add this node to the list.
solidDirections.push_back(iPop);
boundaryIds.push_back(iTriangle);
bool prevNodeIsPureFluid = this->isFluid(prevNode+offset);
if (prevNodeIsPureFluid) {
hasFluidNeighbor.push_back(true);
}
else {
hasFluidNeighbor.push_back(false);
}
}
}
if (!solidDirections.empty()) {
info->getBoundaryNodes().push_back(cellLocation);
info->getSolidDirections().push_back(solidDirections);
info->getBoundaryIds().push_back(boundaryIds);
info->getHasFluidNeighbor().push_back(hasFluidNeighbor);
}
}
}
template<typename T, template<typename U> class Descriptor>
ContainerBlockData*
BouzidiOffLatticeModel3D<T,Descriptor>::generateOffLatticeInfo() const
{
return new BouzidiOffLatticeInfo3D;
}
template<typename T, template<typename U> class Descriptor>
Array<T,3> BouzidiOffLatticeModel3D<T,Descriptor>::getLocalForce (
AtomicContainerBlock3D& container ) const
{
BouzidiOffLatticeInfo3D* info =
dynamic_cast<BouzidiOffLatticeInfo3D*>(container.getData());
PLB_ASSERT( info );
return info->getLocalForce();
}
template<typename T, template<typename U> class Descriptor>
void BouzidiOffLatticeModel3D<T,Descriptor>::boundaryCompletion (
AtomicBlock3D& nonTypeLattice,
AtomicContainerBlock3D& container,
std::vector<AtomicBlock3D const*> const& args )
{
BlockLattice3D<T,Descriptor>& lattice =
dynamic_cast<BlockLattice3D<T,Descriptor>&> (nonTypeLattice);
BouzidiOffLatticeInfo3D* info =
dynamic_cast<BouzidiOffLatticeInfo3D*>(container.getData());
PLB_ASSERT( info );
std::vector<Dot3D> const&
boundaryNodes = info->getBoundaryNodes();
std::vector<std::vector<int> > const&
solidDirections = info->getSolidDirections();
std::vector<std::vector<plint> > const&
boundaryIds = info->getBoundaryIds();
std::vector<std::vector<bool> > const&
hasFluidNeighbor = info->getHasFluidNeighbor();
PLB_ASSERT( boundaryNodes.size() == solidDirections.size() );
PLB_ASSERT( boundaryNodes.size() == boundaryIds.size() );
PLB_ASSERT( boundaryNodes.size() == hasFluidNeighbor.size() );
Dot3D absoluteOffset = lattice.getLocation();
Array<T,3>& localForce = info->getLocalForce();
localForce.resetToZero();
for (pluint i=0; i<boundaryNodes.size(); ++i) {
cellCompletion (
lattice, boundaryNodes[i], solidDirections[i],
boundaryIds[i], hasFluidNeighbor[i], absoluteOffset, localForce, args );
}
}
template<typename T, template<typename U> class Descriptor>
void BouzidiOffLatticeModel3D<T,Descriptor>::cellCompletion (
BlockLattice3D<T,Descriptor>& lattice,
Dot3D const& boundaryNode,
std::vector<int> const& solidDirections, std::vector<plint> const& boundaryIds,
std::vector<bool> const& hasFluidNeighbor, Dot3D const& absoluteOffset,
Array<T,3>& localForce, std::vector<AtomicBlock3D const*> const& args )
{
typedef Descriptor<T> D;
Array<T,D::d> deltaJ;
deltaJ.resetToZero();
plint numNeumannNodes=0;
T neumannDensity = T();
Cell<T,Descriptor>& cell = lattice.get(boundaryNode.x,boundaryNode.y,boundaryNode.z);
for(pluint i=0; i<solidDirections.size(); ++i) {
int iPop = solidDirections[i];
int oppPop = indexTemplates::opposite<D>(i);
Array<T,3> wallNode, wall_vel;
T AC;
OffBoundary::Type bdType;
Array<T,3> wallNormal;
plint id = boundaryIds[i];
#ifdef PLB_DEBUG
bool ok =
#endif
this->pointOnSurface (
boundaryNode+absoluteOffset, Dot3D(D::c[iPop][0],D::c[iPop][1],D::c[iPop][2]),
wallNode, AC, wallNormal, wall_vel, bdType, id );
PLB_ASSERT( ok );
T q = AC * invAB[iPop];
Cell<T,Descriptor>& iCell = lattice.get(boundaryNode.x+D::c[iPop][0],boundaryNode.y+D::c[iPop][1],boundaryNode.z+D::c[iPop][2]);
Cell<T,Descriptor>& jCell = lattice.get(boundaryNode.x-D::c[iPop][0],boundaryNode.y-D::c[iPop][1],boundaryNode.z-D::c[iPop][2]);
if (bdType==OffBoundary::dirichlet) {
T u_ci = D::c[iPop][0]*wall_vel[0]+D::c[iPop][1]*wall_vel[1]+D::c[iPop][2]*wall_vel[2];
if (hasFluidNeighbor[i]) {
if (q<(T)0.5) {
cell[oppPop] = 2.*q*iCell[iPop] + (1.-2.*q)*cell[iPop];
cell[oppPop] += 2.* u_ci*D::t[iPop]*D::invCs2;
}
else {
cell[oppPop] = 1./(2.*q)*iCell[iPop]+(2.*q-1)/(2.*q)*jCell[oppPop];
cell[oppPop] += 1./q* u_ci*D::t[iPop]*D::invCs2;
}
}
else {
cell[oppPop] = iCell[iPop]+2.* u_ci*D::t[iPop]*D::invCs2;
}
}
else if (bdType==OffBoundary::densityNeumann) {
++numNeumannNodes;
neumannDensity += wall_vel[0];
if (hasFluidNeighbor[i]) {
cell[oppPop] = jCell[oppPop];
}
else {
cell[oppPop] = cell[iPop];
}
}
else {
// Not implemented yet.
PLB_ASSERT( false );
}
if (computeStat) {
deltaJ[0] = D::c[iPop][0]*iCell[iPop] - D::c[oppPop][0]*cell[oppPop];
deltaJ[1] = D::c[iPop][1]*iCell[iPop] - D::c[oppPop][1]*cell[oppPop];
deltaJ[2] = D::c[iPop][2]*iCell[iPop] - D::c[oppPop][2]*cell[oppPop];
}
}
localForce += deltaJ;
if (numNeumannNodes>0) {
neumannDensity /= numNeumannNodes;
T oldRhoBar;
Array<T,3> j;
momentTemplates<T,Descriptor>::get_rhoBar_j(cell, oldRhoBar, j);
T newRhoBar = D::rhoBar(neumannDensity);
T jSqr = normSqr(j);
for (plint iPop=0; iPop<D::q; ++iPop) {
T oldEq = cell.getDynamics().computeEquilibrium(iPop, oldRhoBar, j, jSqr);
T newEq = cell.getDynamics().computeEquilibrium(iPop, newRhoBar, j, jSqr);
cell[iPop] += newEq - oldEq;
}
}
}
} // namespace plb
#endif // BOUZIDI_OFF_LATTICE_MODEL_3D_HH
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