/usr/include/palabos/multiGrid/multiGridLattice2D.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/>.
*/
/* Main author: Daniel Lagrava
**/
#ifndef MULTI_GRID_LATTICE_2D_HH
#define MULTI_GRID_LATTICE_2D_HH
#include "multiGrid/multiGridLattice2D.h"
#include "multiGrid/multiGridParameterManager.h"
#include "io/parallelIO.h"
#include "core/util.h"
namespace plb {
/* ****** MultiGridLattice2D ****** */
template <typename T, template <typename U> class Descriptor>
MultiGridLattice2D<T,Descriptor>::MultiGridLattice2D( MultiGridManagement2D management,
Dynamics<T,Descriptor>* backgroundDynamics,
plint behaviorLevel,
FineGridInterfaceInstantiator<T,Descriptor> *fineGridInstantiator_,
CoarseGridInterfaceInstantiator<T,Descriptor> *coarseGridInstantiator_ )
: MultiGrid2D (
management,
behaviorLevel ), fineGridInstantiator(fineGridInstantiator_),
coarseGridInstantiator(coarseGridInstantiator_)
{
std::vector<Dynamics<T,Descriptor>*> dynamicsVector(this->getNumLevels());
for (plint iLevel=0; iLevel<this->getNumLevels(); ++iLevel){
Dynamics<T,Descriptor>* cloned = backgroundDynamics->clone();
cloned->rescale(behaviorLevel-iLevel,behaviorLevel-iLevel);
dynamicsVector[iLevel] = cloned;
}
delete backgroundDynamics;
// generate the lattices that correspond to the blocks contained inside the management object
lattices = generateLattices( this->getMultiGridManagement(), dynamicsVector,
defaultMultiGridPolicy2D().getBlockCommunicator<T>(management.getNumLevels()),
defaultMultiGridPolicy2D().getCombinedStatistics(management.getNumLevels()),
fineGridInstantiator->getEnvelopeWidth());
// initialize the internalStatSubscription (multiGrid) once all the lattices have been created
this->internalStatSubscription().initialize();
}
template <typename T, template <typename U> class Descriptor>
MultiGridLattice2D<T,Descriptor>::MultiGridLattice2D (
MultiGridManagement2D management,
std::vector<BlockCommunicator2D*> communicators_,
std::vector<CombinedStatistics*> combinedStatistics_,
Dynamics<T,Descriptor>* backgroundDynamics,
plint behaviorLevel,
FineGridInterfaceInstantiator<T,Descriptor> *fineGridInstantiator_,
CoarseGridInterfaceInstantiator<T,Descriptor> *coarseGridInstantiator_ )
: MultiGrid2D( management,
behaviorLevel ), fineGridInstantiator(fineGridInstantiator_),
coarseGridInstantiator(coarseGridInstantiator_)
{
std::vector<Dynamics<T,Descriptor>*> dynamicsVector(this->getNumLevels());
for (plint iLevel=0; iLevel<this->getNumLevels(); ++iLevel){
Dynamics<T,Descriptor>* cloned = backgroundDynamics->clone();
cloned->rescale(behaviorLevel-iLevel,behaviorLevel-iLevel);
dynamicsVector[iLevel] = cloned;
}
delete backgroundDynamics;
// generate the lattices that correspond to the blocks contained inside the management object
lattices = generateLattices( this->getMultiGridManagement(), dynamicsVector,
communicators_, combinedStatistics_,
fineGridInstantiator->getEnvelopeWidth() );
// initialize the internalStatSubscription (multiGrid) once all the lattices have been created
this->internalStatSubscription().initialize();
}
/// Get rid properly of all the pointers in the class
template <typename T, template <typename U> class Descriptor>
MultiGridLattice2D<T,Descriptor>::~MultiGridLattice2D(){
for (plint i = 0; i < this->getNumLevels(); ++i){
delete lattices[i];
// the dynamics are taken care by each lattice
}
delete fineGridInstantiator;
delete coarseGridInstantiator;
}
template <typename T, template <typename U> class Descriptor>
MultiGridLattice2D<T,Descriptor>::MultiGridLattice2D(MultiGridLattice2D<T,Descriptor> const& rhs)
: MultiGrid2D(rhs), fineGridInstantiator(rhs.fineGridInstantiator->clone()),
coarseGridInstantiator(rhs.coarseGridInstantiator->clone())
{
std::vector<Dynamics<T,Descriptor>*> dynamicsVector(this->getNumLevels());
for (plint iLevel=0; iLevel<this->getNumLevels(); ++iLevel){
Dynamics<T,Descriptor>* cloned = rhs.lattices[iLevel]->getBackgroundDynamics().clone();
dynamicsVector[iLevel] = cloned;
}
MultiGridManagement2D const& management = this->getMultiGridManagement();
// generate the lattices that correspond to the blocks contained inside the management object
lattices = generateLattices( management, dynamicsVector,
defaultMultiGridPolicy2D().getBlockCommunicator<T>(management.getNumLevels()),
defaultMultiGridPolicy2D().getCombinedStatistics(management.getNumLevels()),
fineGridInstantiator->getEnvelopeWidth() );
// initialize the internalStatSubscription (multiGrid) once all the lattices have been created
this->internalStatSubscription().initialize();
}
template <typename T, template <typename U> class Descriptor>
MultiGridLattice2D<T,Descriptor>::MultiGridLattice2D( MultiGridLattice2D<T,Descriptor> const& rhs,
Box2D subDomain, bool crop )
: MultiGrid2D(rhs, subDomain, crop), fineGridInstantiator(rhs.fineGridInstantiator),
coarseGridInstantiator(rhs.coarseGridInstantiator)
{
std::vector<Dynamics<T,Descriptor>*> backgroundDynamics;
for (plint iDyn=0; iDyn<this->getNumLevels(); ++iDyn) {
backgroundDynamics[iDyn] = new NoDynamics<T,Descriptor>();
}
// generate the lattices that correspond to the blocks contained inside the management object
lattices = generateLattices( this->getMultiGridManagement(), backgroundDynamics,
this->getCommunicators(), this->getCombinedStatistics(),
fineGridInstantiator->getEnvelopeWidth() );
// initialize the internalStatSubscription (multiGrid) once all the lattices have been created
this->internalStatSubscription().initialize();
}
template <typename T, template <typename U> class Descriptor>
MultiGridLattice2D<T,Descriptor>::MultiGridLattice2D(MultiGrid2D const& rhs)
: MultiGrid2D(rhs)
{
std::vector<Dynamics<T,Descriptor>*> backgroundDynamics;
for (plint iDyn=0; iDyn<this->getNumLevels(); ++iDyn) {
backgroundDynamics[iDyn] = new NoDynamics<T,Descriptor>();
}
// generate the lattices that correspond to the blocks contained inside the management object
lattices = generateLattices( this->getMultiGridManagement(), backgroundDynamics,
this->getCommunicators(), this->getCombinedStatistics() );
// initialize the internalStatSubscription (multiGrid) once all the lattices have been created
this->internalStatSubscription().initialize();
}
template <typename T, template <typename U> class Descriptor>
MultiGridLattice2D<T,Descriptor>::MultiGridLattice2D( MultiGrid2D const& rhs,
Box2D subDomain, bool crop )
: MultiGrid2D(rhs, subDomain, crop)
{
std::vector<Dynamics<T,Descriptor>*> backgroundDynamics;
for (plint iDyn=0; iDyn<this->getNumLevels(); ++iDyn) {
backgroundDynamics[iDyn] = new NoDynamics<T,Descriptor>();
}
// generate the lattices that correspond to the blocks contained inside the management object
lattices = generateLattices( this->getMultiGridManagement(), backgroundDynamics,
this->getCommunicators(), this->getCombinedStatistics() );
// initialize the internalStatSubscription (multiGrid) once all the lattices have been created
this->internalStatSubscription().initialize();
}
template<typename T, template<typename U> class Descriptor>
MultiGridLattice2D<T,Descriptor>& MultiGridLattice2D<T,Descriptor>::operator= (
MultiGridLattice2D<T,Descriptor> const& rhs )
{
MultiGridLattice2D<T,Descriptor> tmp(rhs);
swap(tmp);
return *this;
}
/** This method should be called to create the coupling among the internal multi blocks of the
* multi grid.
*/
template <typename T, template <typename U> class Descriptor>
void MultiGridLattice2D<T,Descriptor>::initialize()
{
this->createInterfaces();
// eliminate the statistics in the refinement overlap
this->eliminateStatisticsInOverlap();
// Execute this data processor once, because this allocates memory on the fine grid dynamcis
// for time t0 (after we have values for t1)
lattices[0]->initialize();
std::vector<std::vector<Box2D> > fineGridInterfaces = this->getMultiGridManagement().getFineInterface();
plint timeForImmediateExecution = 0;
plint numTimeSteps=2;
// fineGrid interfaces start at level 1
for (pluint iLevel=1; iLevel<fineGridInterfaces.size(); ++iLevel){
std::vector<Box2D> levelInterfaces=fineGridInterfaces[iLevel];
for (pluint iInterf=0; iInterf<levelInterfaces.size(); ++iInterf){
applyProcessingFunctional (
new Copy_t1_to_t0_2D<T, Descriptor>(numTimeSteps, timeForImmediateExecution),
levelInterfaces[iInterf].multiply(2),
*lattices[iLevel] );
}
lattices[iLevel]->initialize();
}
// toggle all stats on
for (int iLevel = 0; iLevel < (plint)lattices.size(); ++iLevel){
lattices[iLevel]->toggleInternalStatistics(true);
}
}
template <typename T, template <typename U> class Descriptor>
void MultiGridLattice2D<T,Descriptor>::createInterfaces(){
MultiGridManagement2D management = this->getMultiGridManagement();
std::vector<std::vector<Box2D> > fineGridInterfaces = management.getFineInterface();
std::vector<std::vector<Box2D> > coarseGridInterfaces = management.getCoarseInterface();
std::vector<std::vector<Array<plint,2> > > coarseOrientations = management.getCoarseOrientation();
std::vector<std::vector<Array<plint,2> > > fineOrientations = management.getFineOrientation();
// Create the part of the coupling in which a lattice acts as a coarse lattice.
for (pluint iCoarse=0; iCoarse<lattices.size()-1; ++iCoarse) {
for (pluint iInterface=0; iInterface<coarseGridInterfaces[iCoarse].size(); ++iInterface) {
plint direction = (coarseOrientations[iCoarse][iInterface])[0]; // w.r.t. the coarse grid
plint orientation = (coarseOrientations[iCoarse][iInterface])[1]; // w.r.t. the coarse grid
coarseGridInstantiator->instantiateDataProcessors(coarseGridInterfaces[iCoarse][iInterface],
*lattices[iCoarse],*lattices[iCoarse+1],
direction, orientation);
}
}
// Create the part of the coupling in which a lattice acts as a fine lattice.
for (pluint iFine=1; iFine<lattices.size(); ++iFine) {
for (pluint iInterface=0; iInterface<fineGridInterfaces[iFine].size(); ++iInterface) {
plint direction = (fineOrientations[iFine][iInterface])[0]; // w.r.t. the fine grid
plint orientation = (fineOrientations[iFine][iInterface])[1]; // w.r.t. the fine grid
fineGridInstantiator->instantiateDataProcessors(fineGridInterfaces[iFine][iInterface],
*lattices[iFine-1],*lattices[iFine],
direction, orientation);
}
}
}
/* *** MultiGrid2D methods *** */
/// Retrieve the lattices representing each a refinement level
template <typename T, template <typename U> class Descriptor>
MultiBlockLattice2D<T,Descriptor>& MultiGridLattice2D<T,Descriptor>::getComponent(plint iBlock)
{
PLB_PRECONDITION( iBlock >= 0 && iBlock < (plint) lattices.size() );
return *lattices[iBlock];
}
template <typename T, template <typename U> class Descriptor>
const MultiBlockLattice2D<T,Descriptor>& MultiGridLattice2D<T,Descriptor>::getComponent(plint iBlock) const
{
PLB_PRECONDITION( iBlock >= 0 && iBlock < (plint) lattices.size() );
return *lattices[iBlock];
}
/* **** BlockLatticeBase2D methods **** */
template <typename T, template <typename U> class Descriptor>
Cell<T,Descriptor>& MultiGridLattice2D<T,Descriptor>::get(plint iX, plint iY){
return lattices[this->getBehaviorLevel()]->get(iX,iY);
}
template <typename T, template <typename U> class Descriptor>
Cell<T,Descriptor> const& MultiGridLattice2D<T,Descriptor>::get(plint iX, plint iY) const{
return lattices[this->getBehaviorLevel()]->get(iX,iY);
}
template <typename T, template <typename U> class Descriptor>
void MultiGridLattice2D<T,Descriptor>::specifyStatisticsStatus(Box2D domain, bool status){
for (plint iLevel = 0; iLevel < (plint)lattices.size(); ++iLevel){
Box2D rescaledDomain = this->getScaleManager().scaleBox(domain,iLevel);
lattices[iLevel]->specifyStatisticsStatus(rescaledDomain,status);
}
}
template <typename T, template <typename U> class Descriptor>
void MultiGridLattice2D<T,Descriptor>::collide(Box2D domain){
plint levelNumber = (plint)lattices.size();
PLB_PRECONDITION( levelNumber >= 0 && levelNumber <= (plint)lattices.size() );
for (plint iLevel = 0; iLevel < levelNumber; ++iLevel){
// each level will iterate 2 times the iterations of level - 1
plint fineGridIt = util::roundToInt(util::twoToThePower(iLevel));
for (plint iterations = 0; iterations < fineGridIt; ++iterations){
lattices[iLevel]->collide(domain);
}
}
}
template <typename T, template <typename U> class Descriptor>
void MultiGridLattice2D<T,Descriptor>::collide() {
plint levelNumber = (plint)lattices.size();
PLB_PRECONDITION( levelNumber >= 0 && levelNumber <= (plint)lattices.size() );
for (plint iLevel = 0; iLevel < levelNumber; ++iLevel){
// each level will iterate 2 times the iterations of level - 1
plint fineGridIt = util::roundToInt(util::twoToThePower(iLevel));
for (plint iterations = 0; iterations < fineGridIt; ++iterations){
lattices[iLevel]->collide();
}
}
}
template <typename T, template <typename U> class Descriptor>
void MultiGridLattice2D<T,Descriptor>::stream(Box2D domain) {
plint levelNumber = (plint)lattices.size();
PLB_PRECONDITION( levelNumber >= 0 && levelNumber <= (plint)lattices.size() );
for (plint iLevel = 0; iLevel < levelNumber; ++iLevel){
// each level will iterate 2 times the iterations of level - 1
plint fineGridIt = util::roundToInt(util::twoToThePower(iLevel));
for (plint iterations = 0; iterations < fineGridIt; ++iterations){
lattices[iLevel]->stream(domain);
}
}
}
template <typename T, template <typename U> class Descriptor>
void MultiGridLattice2D<T,Descriptor>::stream() {
plint levelNumber = (plint)lattices.size();
PLB_PRECONDITION( levelNumber >= 0 && levelNumber <= (plint)lattices.size() );
for (plint iLevel = 0; iLevel < levelNumber; ++iLevel){
// each level will iterate 2 times the iterations of level - 1
plint fineGridIt = util::roundToInt(util::twoToThePower(iLevel));
for (plint iterations = 0; iterations < fineGridIt; ++iterations){
lattices[iLevel]->stream();
}
// update the values for parallelism
lattices[iLevel]->getBlockCommunicator().duplicateOverlaps(*lattices[iLevel], modif::staticVariables);
}
this->evaluateStatistics();
}
/// One iteration of the multigrid over a given domain (this domain reffers to the reference level)
template <typename T, template <typename U> class Descriptor>
void MultiGridLattice2D<T,Descriptor>::collideAndStream(Box2D domain){
plint levelNumber = (plint)lattices.size();
PLB_PRECONDITION( levelNumber >= 0 && levelNumber <= (plint)lattices.size() );
for (plint iLevel = 0; iLevel < levelNumber; ++iLevel){
// each level will iterate 2 times the iterations of level - 1
plint fineGridIt = util::roundToInt(util::twoToThePower(iLevel));
for (plint iterations = 0; iterations < fineGridIt; ++iterations){
lattices[iLevel]->collideAndStream(domain);
}
}
}
template <typename T, template <typename U> class Descriptor>
void MultiGridLattice2D<T,Descriptor>::iterateMultiGrid(plint level){
PLB_PRECONDITION( level>=0 && level<(plint)lattices.size() );
lattices[level]->collideAndStream();
if ((pluint)level<lattices.size()-1) {
iterateMultiGrid(level+1);
iterateMultiGrid(level+1);
// Overlaps must be duplicated on the coarse lattice, because the
// fine->coarse copy acts on bulk nodes only.
lattices[level]->getBlockCommunicator().duplicateOverlaps(*lattices[level], modif::staticVariables);
}
}
/// One iteration of the entire multigrid
template <typename T, template <typename U> class Descriptor>
void MultiGridLattice2D<T,Descriptor>::collideAndStream(){
iterateMultiGrid(0);
this->evaluateStatistics();
}
/** This function does not have a sense in the multigrid case. It is
* therefore void but implemented to complain with the BlockLatticeBase2D interface
*/
template <typename T, template <typename U> class Descriptor>
void MultiGridLattice2D<T,Descriptor>::incrementTime()
{}
template <typename T, template <typename U> class Descriptor>
TimeCounter& MultiGridLattice2D<T,Descriptor>::getTimeCounter(){
return lattices[this->getBehaviorLevel()]->getTimeCounter();
}
template <typename T, template <typename U> class Descriptor>
TimeCounter const& MultiGridLattice2D<T,Descriptor>::getTimeCounter() const{
return lattices[this->getBehaviorLevel()]->getTimeCounter();
}
template <typename T, template <typename U> class Descriptor>
int MultiGridLattice2D<T,Descriptor>::getBlockId () const{
return lattices[this->getReferenceLevel()]->getStaticId();
}
/** Use the information contained in manualGridRefiner to avoid the
* computation of statistics in the overlapping regions between the coarse
* and fine grids.
*/
template <typename T, template <typename U> class Descriptor>
void MultiGridLattice2D<T,Descriptor>::eliminateStatisticsInOverlap(){
// the fine interface is the region inside the fine grid that overlaps with the coarse
// grid. It is therefore there that we need to turn off the statistics in the
// coarse grid.
std::vector<std::vector<Box2D> > fineOverlaps = this->getMultiGridManagement().getFineInterface();
for (plint iLevel = 0; iLevel < (plint)lattices.size()-1; ++iLevel){
for (plint iOv = 0; iOv < (plint)fineOverlaps[iLevel].size(); ++iOv){
Box2D currentOverlap = (fineOverlaps[iLevel])[iOv];
lattices[iLevel]->specifyStatisticsStatus(currentOverlap, false);
}
}
// it is also necessary to avoid computation in the coarse interface, as the refinement
// overlap is two coarse sites
std::vector<std::vector<Box2D> > coarseOverlaps = this->getMultiGridManagement().getCoarseInterface();
for (plint iLevel = 0; iLevel < (plint)lattices.size()-1; ++iLevel){
for (plint iOv = 0; iOv < (plint)coarseOverlaps[iLevel].size(); ++iOv){
Box2D currentOverlap = (coarseOverlaps[iLevel])[iOv];
lattices[iLevel]->specifyStatisticsStatus(currentOverlap, false);
}
}
}
/** Interpolate and decimate the multi blocks that form the MultiGridLattice2D
* in order to have several multi blocks of the same level. Then join them by
* performing a union of multi blocks.
*/
template <typename T, template <typename U> class Descriptor>
std::auto_ptr<MultiBlockLattice2D<T,Descriptor> > MultiGridLattice2D<T,Descriptor>::convertToLevel(plint level) const
{
// create the resulting multiBlock
std::auto_ptr<MultiBlockLattice2D<T,Descriptor> > result =
generateMultiBlockLattice<T,Descriptor>(
lattices[level]->getBoundingBox(),
lattices[level]->getBackgroundDynamics().clone(),
lattices[level]->getMultiBlockManagement().getEnvelopeWidth() );
// create the first lattice to start looping
std::auto_ptr<MultiBlockLattice2D<T,Descriptor> > refined =
generateMultiBlockLattice<T,Descriptor>(
lattices[0]->getBoundingBox(),
lattices[0]->getBackgroundDynamics().clone(),
lattices[0]->getMultiBlockManagement().getEnvelopeWidth() );
copyNonLocal<T,Descriptor>(*lattices[0],*refined,
refined->getBoundingBox(), modif::staticVariables);
// loop to interpolate the blocks until level-1
for (plint iLevel=0; iLevel<(plint)level; ++iLevel){
plint envelopeWidth = lattices[iLevel+1]->getMultiBlockManagement().getEnvelopeWidth();
// interpolate lattice at iLevel
std::auto_ptr<MultiBlockLattice2D<T,Descriptor> > tmp =
refine(*refined,-1,-1,refined->getBackgroundDynamics().clone());
refined = generateMultiBlockLattice<T,Descriptor>(lattices[iLevel+1]->getBoundingBox(),
lattices[iLevel+1]->getBackgroundDynamics().clone(),
envelopeWidth );
// copy from reshaped iLevel to result
copyNonLocal<T,Descriptor>(*tmp, *refined, refined->getBoundingBox(),modif::staticVariables);
// copy from iLevel+1 to result
copyNonLocal<T,Descriptor>(*lattices[iLevel+1], *refined, refined->getBoundingBox(),modif::staticVariables);
}
// create the last lattice to start looping in the other orientation
plint lastLevel = getNumLevels()-1;
std::auto_ptr<MultiBlockLattice2D<T,Descriptor> > coarsened =
std::auto_ptr<MultiBlockLattice2D<T,Descriptor> > (
new MultiBlockLattice2D<T,Descriptor>(*lattices[lastLevel]));
defineDynamics<T,Descriptor>( *coarsened, coarsened->getBoundingBox(),
lattices[lastLevel]->getBackgroundDynamics().clone() );
copyNonLocal<T,Descriptor>(*lattices[lastLevel],*coarsened,
coarsened->getBoundingBox(), modif::staticVariables);
// loop to decimate the blocks until level+1
for (plint iLevel=getNumLevels()-1; iLevel>=(plint)level+1; --iLevel){
// interpolate lattice at iLevel
std::auto_ptr<MultiBlockLattice2D<T,Descriptor> > tmp =
coarsen(*coarsened,1,1, lattices[iLevel]->getBackgroundDynamics().clone() );
coarsened = generateJoinMultiBlockLattice<T,Descriptor>(*tmp, *lattices[iLevel-1]);
// make all the dynamics from refinement disappear
defineDynamics<T,Descriptor>(*coarsened, coarsened->getBoundingBox(),
lattices[iLevel-1]->getBackgroundDynamics().clone() );
// copy from reshaped iLevel to result
copyNonLocal<T,Descriptor>(*tmp, *coarsened, coarsened->getBoundingBox(),modif::staticVariables);
// copy from iLevel-1 to result
copyNonLocal<T,Descriptor>(*lattices[iLevel-1], *coarsened, coarsened->getBoundingBox(),modif::staticVariables);
}
// final copies
copyNonLocal<T,Descriptor>(*refined, *result, result->getBoundingBox(),modif::staticVariables);
copyNonLocal<T,Descriptor>(*lattices[level], *result, result->getBoundingBox(),modif::staticVariables);
copyNonLocal<T,Descriptor>(*coarsened, *result, result->getBoundingBox(),modif::staticVariables);
return result;
}
/////////// Free Functions //////////////////////////////
template<typename T, template<typename U> class Descriptor>
double getStoredAverageDensity(MultiGridLattice2D<T,Descriptor> const& multiGrid){
return Descriptor<T>::fullRho (
multiGrid.getInternalStatistics().getAverage(
LatticeStatistics::avRhoBar ) );
}
template<typename T, template<typename U> class Descriptor>
double getStoredAverageEnergy(MultiGridLattice2D<T,Descriptor> const& multiGrid){
return 0.5 * multiGrid.getInternalStatistics().getAverage(
LatticeStatistics::avUSqr );
}
template<typename T, template<typename U> class Descriptor>
double getStoredMaxVelocity(MultiGridLattice2D<T,Descriptor> const& multiGrid){
return std::sqrt( multiGrid.getInternalStatistics().getMax (
LatticeStatistics::maxUSqr ) );
}
}// namespace plb
#endif // MULTI_GRID_LATTICE_2D_HH
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