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/* This file is part of the OpenLB library
*
* Copyright (C) 2006-2007 Jonas Latt
* 2015-2019 Mathias J. Krause, Adrian Kummerlaender
* 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.
*/
/** \file
* Definition of a LB cell -- generic implementation.
*/
#ifndef CELL_HH
#define CELL_HH
#include <algorithm>
#include "cell.h"
#include "util.h"
#include "dynamics/lbHelpers.h"
namespace olb {
////////////////////////// Class Cell /////////////////////////////
/** The possibility to default construct Cell objects facilitates
* their use in various types of containers. However, they can not
* be used directly after construction; the method defineDynamics()
* must be used first.
*/
template<typename T, typename DESCRIPTOR>
Cell<T,DESCRIPTOR>::Cell()
: dynamics(nullptr)
{
initializeData();
}
/** This constructor initializes the dynamics, but not the values
* of the distribution functions. Remember that the dynamics is not
* owned by the Cell object, the user must ensure its proper
* destruction and a sufficient life time.
*/
template<typename T, typename DESCRIPTOR>
Cell<T,DESCRIPTOR>::Cell(Dynamics<T,DESCRIPTOR>* dynamics_)
: dynamics(dynamics_)
{
initializeData();
}
template<typename T, typename DESCRIPTOR>
void Cell<T,DESCRIPTOR>::defineDynamics(Dynamics<T,DESCRIPTOR>* dynamics_)
{
dynamics = dynamics_;
}
template<typename T, typename DESCRIPTOR>
Dynamics<T,DESCRIPTOR> const* Cell<T,DESCRIPTOR>::getDynamics() const
{
OLB_PRECONDITION(dynamics);
return dynamics;
}
template<typename T, typename DESCRIPTOR>
Dynamics<T,DESCRIPTOR>* Cell<T,DESCRIPTOR>::getDynamics()
{
OLB_PRECONDITION(dynamics);
return dynamics;
}
template<typename T, typename DESCRIPTOR>
void Cell<T,DESCRIPTOR>::computeFeq(T fEq[descriptors::q<DESCRIPTOR>()]) const
{
T rho{};
T u[2] {};
computeRhoU(rho, u);
const T uSqr = u[0]*u[0] + u[1]*u[1];
for (int iPop=0; iPop < descriptors::q<DESCRIPTOR>(); ++iPop) {
fEq[iPop] = lbHelpers<T,DESCRIPTOR>::equilibrium(iPop, rho, u, uSqr);
}
}
template <typename T, typename DESCRIPTOR>
void Cell<T,DESCRIPTOR>::computeFneq(T fNeq[descriptors::q<DESCRIPTOR>()]) const
{
T rho{};
T u[2] {};
computeRhoU(rho, u);
lbHelpers<T,DESCRIPTOR>::computeFneq(*this, fNeq, rho, u);
}
template<typename T, typename DESCRIPTOR>
void Cell<T,DESCRIPTOR>::revert()
{
for (int iPop=1; iPop<=descriptors::q<DESCRIPTOR>()/2; ++iPop) {
std::swap(this->data[iPop],this->data[iPop+descriptors::q<DESCRIPTOR>()/2]);
}
}
template<typename T, typename DESCRIPTOR>
void Cell<T,DESCRIPTOR>::initializeData()
{
for (int iPop=0; iPop<DESCRIPTOR::size(); ++iPop) {
this->data[iPop] = T();
}
}
template<typename T, typename DESCRIPTOR>
void Cell<T,DESCRIPTOR>::serialize(T* data) const
{
for (int i=0; i < DESCRIPTOR::size(); ++i) {
data[i] = this->data[i];
}
}
template<typename T, typename DESCRIPTOR>
void Cell<T,DESCRIPTOR>::unSerialize(T const* data)
{
for (int i=0; i < DESCRIPTOR::size(); ++i) {
this->data[i] = data[i];
}
}
template<typename T, typename DESCRIPTOR>
std::size_t Cell<T,DESCRIPTOR>::getSerializableSize() const
{
return sizeof(T) * DESCRIPTOR::size();
}
template<typename T, typename DESCRIPTOR>
bool* Cell<T,DESCRIPTOR>::getBlock(std::size_t iBlock, std::size_t& sizeBlock, bool loadingMode)
{
std::size_t currentBlock = 0;
bool* dataPtr = nullptr;
this->registerVar(iBlock, sizeBlock, currentBlock, dataPtr, this->data[0], DESCRIPTOR::size());
return dataPtr;
}
} // namespace olb
#endif
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