/usr/include/palabos/complexDynamics/trtDynamics.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 TRT_DYNAMICS_HH
#define TRT_DYNAMICS_HH
#include "complexDynamics/trtDynamics.h"
#include "latticeBoltzmann/dynamicsTemplates.h"
#include "latticeBoltzmann/momentTemplates.h"
#include "core/latticeStatistics.h"
#include <algorithm>
#include <limits>
namespace plb {
/* *************** Class TRTdynamics *********************************************** */
template<typename T, template<typename U> class Descriptor>
const T TRTdynamics<T,Descriptor>::sMinus = 1.1;
template<typename T, template<typename U> class Descriptor>
int TRTdynamics<T,Descriptor>::id =
meta::registerOneParamDynamics<T,Descriptor,TRTdynamics<T,Descriptor> >("TRT");
/** \param omega_ relaxation parameter, related to the dynamic viscosity
*/
template<typename T, template<typename U> class Descriptor>
TRTdynamics<T,Descriptor>::TRTdynamics(T omega_ )
: IsoThermalBulkDynamics<T,Descriptor>(omega_)
{ }
template<typename T, template<typename U> class Descriptor>
TRTdynamics<T,Descriptor>* TRTdynamics<T,Descriptor>::clone() const {
return new TRTdynamics<T,Descriptor>(*this);
}
template<typename T, template<typename U> class Descriptor>
int TRTdynamics<T,Descriptor>::getId() const {
return id;
}
template<typename T, template<typename U> class Descriptor>
void TRTdynamics<T,Descriptor>::collide (
Cell<T,Descriptor>& cell, BlockStatistics& statistics )
{
const T sPlus = this->getOmega();
Array<T,Descriptor<T>::q> eq;
// In the following, we number the plus/minus variables from 1 to (Q-1)/2.
// So we allocate the index-zero memory location, and waste some memory
// for convenience.
Array<T,Descriptor<T>::q/2+1> eq_plus, eq_minus, f_plus, f_minus;
Array<T,3> j;
T rhoBar;
momentTemplates<T,Descriptor>::get_rhoBar_j(cell, rhoBar, j);
T jSqr = normSqr(j);
T invRho = Descriptor<T>::invRho(rhoBar);
dynamicsTemplates<T,Descriptor>::bgk_ma2_equilibria(rhoBar, invRho, j, jSqr, eq);
for (plint i=1; i<=Descriptor<T>::q/2; ++i) {
eq_plus[i] = 0.5*(eq[i] + eq[i+Descriptor<T>::q/2]);
eq_minus[i] = 0.5*(eq[i] - eq[i+Descriptor<T>::q/2]);
f_plus[i] = 0.5*(cell[i] + cell[i+Descriptor<T>::q/2]);
f_minus[i] = 0.5*(cell[i] - cell[i+Descriptor<T>::q/2]);
}
cell[0] += -sPlus*cell[0] + sPlus*eq[0];
for (plint i=1; i<=Descriptor<T>::q/2; ++i) {
cell[i] += -sPlus*(f_plus[i]-eq_plus[i]) - sMinus*(f_minus[i]-eq_minus[i]);
cell[i+Descriptor<T>::q/2] += -sPlus*(f_plus[i]-eq_plus[i]) + sMinus*(f_minus[i]-eq_minus[i]);
}
if (cell.takesStatistics()) {
gatherStatistics(statistics, rhoBar, jSqr * invRho * invRho );
}
}
template<typename T, template<typename U> class Descriptor>
void TRTdynamics<T,Descriptor>::collideExternal (
Cell<T,Descriptor>& cell, T rhoBar, Array<T,Descriptor<T>::d> const& j,
T thetaBar, BlockStatistics& statistics )
{
const T sPlus = this->getOmega();
Array<T,Descriptor<T>::q> eq;
// In the following, we number the plus/minus variables from 1 to (Q-1)/2.
// So we allocate the index-zero memory location, and waste some memory
// for convenience.
Array<T,Descriptor<T>::q/2+1> eq_plus, eq_minus, f_plus, f_minus;
T jSqr = normSqr(j);
T invRho = Descriptor<T>::invRho(rhoBar);
dynamicsTemplates<T,Descriptor>::bgk_ma2_equilibria(rhoBar, invRho, j, jSqr, eq);
for (plint i=1; i<=Descriptor<T>::q/2; ++i) {
eq_plus[i] = 0.5*(eq[i] + eq[i+Descriptor<T>::q/2]);
eq_minus[i] = 0.5*(eq[i] - eq[i+Descriptor<T>::q/2]);
f_plus[i] = 0.5*(cell[i] + cell[i+Descriptor<T>::q/2]);
f_minus[i] = 0.5*(cell[i] - cell[i+Descriptor<T>::q/2]);
}
cell[0] += -sPlus*cell[0] + sPlus*eq[0];
for (plint i=1; i<=Descriptor<T>::q/2; ++i) {
cell[i] += -sPlus*(f_plus[i]-eq_plus[i]) - sMinus*(f_minus[i]-eq_minus[i]);
cell[i+Descriptor<T>::q/2] += -sPlus*(f_plus[i]-eq_plus[i]) + sMinus*(f_minus[i]-eq_minus[i]);
}
if (cell.takesStatistics()) {
gatherStatistics(statistics, rhoBar, jSqr * Descriptor<T>::invRho(rhoBar) * Descriptor<T>::invRho(rhoBar) );
}
}
template<typename T, template<typename U> class Descriptor>
T TRTdynamics<T,Descriptor>::computeEquilibrium(plint iPop, T rhoBar, Array<T,Descriptor<T>::d> const& j,
T jSqr, T thetaBar) const
{
T invRho = Descriptor<T>::invRho(rhoBar);
return dynamicsTemplates<T,Descriptor>::bgk_ma2_equilibrium(iPop, rhoBar, invRho, j, jSqr);
}
/* *************** Class IncTRTdynamics *********************************************** */
template<typename T, template<typename U> class Descriptor>
const T IncTRTdynamics<T,Descriptor>::sMinus = 1.1;
template<typename T, template<typename U> class Descriptor>
int IncTRTdynamics<T,Descriptor>::id =
meta::registerOneParamDynamics<T,Descriptor,IncTRTdynamics<T,Descriptor> >("IncTRT");
/** \param omega_ relaxation parameter, related to the dynamic viscosity
*/
template<typename T, template<typename U> class Descriptor>
IncTRTdynamics<T,Descriptor>::IncTRTdynamics(T omega_ )
: IsoThermalBulkDynamics<T,Descriptor>(omega_)
{ }
template<typename T, template<typename U> class Descriptor>
IncTRTdynamics<T,Descriptor>* IncTRTdynamics<T,Descriptor>::clone() const {
return new IncTRTdynamics<T,Descriptor>(*this);
}
template<typename T, template<typename U> class Descriptor>
int IncTRTdynamics<T,Descriptor>::getId() const {
return id;
}
template<typename T, template<typename U> class Descriptor>
void IncTRTdynamics<T,Descriptor>::collide (
Cell<T,Descriptor>& cell, BlockStatistics& statistics )
{
const T sPlus = this->getOmega();
Array<T,Descriptor<T>::q> eq;
// In the following, we number the plus/minus variables from 1 to (Q-1)/2.
// So we allocate the index-zero memory location, and waste some memory
// for convenience.
Array<T,Descriptor<T>::q/2+1> eq_plus, eq_minus, f_plus, f_minus;
Array<T,3> j;
T rhoBar;
momentTemplates<T,Descriptor>::get_rhoBar_j(cell, rhoBar, j);
T jSqr = normSqr(j);
T invRho0 = 1.;
dynamicsTemplates<T,Descriptor>::bgk_ma2_equilibria(rhoBar, invRho0, j, jSqr, eq);
for (plint i=1; i<=Descriptor<T>::q/2; ++i) {
eq_plus[i] = 0.5*(eq[i] + eq[i+Descriptor<T>::q/2]);
eq_minus[i] = 0.5*(eq[i] - eq[i+Descriptor<T>::q/2]);
f_plus[i] = 0.5*(cell[i] + cell[i+Descriptor<T>::q/2]);
f_minus[i] = 0.5*(cell[i] - cell[i+Descriptor<T>::q/2]);
}
cell[0] += -sPlus*cell[0] + sPlus*eq[0];
for (plint i=1; i<=Descriptor<T>::q/2; ++i) {
cell[i] += -sPlus*(f_plus[i]-eq_plus[i]) - sMinus*(f_minus[i]-eq_minus[i]);
cell[i+Descriptor<T>::q/2] += -sPlus*(f_plus[i]-eq_plus[i]) + sMinus*(f_minus[i]-eq_minus[i]);
}
if (cell.takesStatistics()) {
gatherStatistics(statistics, rhoBar, jSqr);
}
}
template<typename T, template<typename U> class Descriptor>
void IncTRTdynamics<T,Descriptor>::collideExternal (
Cell<T,Descriptor>& cell, T rhoBar, Array<T,Descriptor<T>::d> const& j,
T thetaBar, BlockStatistics& statistics )
{
const T sPlus = this->getOmega();
Array<T,Descriptor<T>::q> eq;
// In the following, we number the plus/minus variables from 1 to (Q-1)/2.
// So we allocate the index-zero memory location, and waste some memory
// for convenience.
Array<T,Descriptor<T>::q/2+1> eq_plus, eq_minus, f_plus, f_minus;
T jSqr = normSqr(j);
T invRho0 = 1.;
dynamicsTemplates<T,Descriptor>::bgk_ma2_equilibria(rhoBar, invRho0, j, jSqr, eq);
for (plint i=1; i<=Descriptor<T>::q/2; ++i) {
eq_plus[i] = 0.5*(eq[i] + eq[i+Descriptor<T>::q/2]);
eq_minus[i] = 0.5*(eq[i] - eq[i+Descriptor<T>::q/2]);
f_plus[i] = 0.5*(cell[i] + cell[i+Descriptor<T>::q/2]);
f_minus[i] = 0.5*(cell[i] - cell[i+Descriptor<T>::q/2]);
}
cell[0] += -sPlus*cell[0] + sPlus*eq[0];
for (plint i=1; i<=Descriptor<T>::q/2; ++i) {
cell[i] += -sPlus*(f_plus[i]-eq_plus[i]) - sMinus*(f_minus[i]-eq_minus[i]);
cell[i+Descriptor<T>::q/2] += -sPlus*(f_plus[i]-eq_plus[i]) + sMinus*(f_minus[i]-eq_minus[i]);
}
if (cell.takesStatistics()) {
gatherStatistics(statistics, rhoBar, jSqr);
}
}
template<typename T, template<typename U> class Descriptor>
T IncTRTdynamics<T,Descriptor>::computeEquilibrium(plint iPop, T rhoBar, Array<T,Descriptor<T>::d> const& j,
T jSqr, T thetaBar) const
{
return dynamicsTemplates<T,Descriptor>::bgk_ma2_equilibrium(iPop, rhoBar, (T)1, j, jSqr);
}
template<typename T, template<typename U> class Descriptor>
bool IncTRTdynamics<T,Descriptor>::velIsJ() const {
return true;
}
template<typename T, template<typename U> class Descriptor>
void IncTRTdynamics<T,Descriptor>::computeVelocity( Cell<T,Descriptor> const& cell,
Array<T,Descriptor<T>::d>& u ) const
{
T dummyRhoBar;
this->computeRhoBarJ(cell, dummyRhoBar, u);
}
}
#endif // TRT_DYNAMICS_HH
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