bounceBackModels.h

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/* This file is part of the Palabos library.
 *
 * Copyright (C) 2011 FlowKit Sarl
 * Avenue de Chailly 23
 * 1012 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 BOUNCE_BACK_MODELS_H
#define BOUNCE_BACK_MODELS_H

#include "core/dynamics.h"
#include <vector>

namespace plb {


template<typename T, template<typename U> class Descriptor>
class MomentumExchangeBounceBack : public Dynamics<T,Descriptor> {
public:
/* *************** Construction / Destruction ************************ */

    MomentumExchangeBounceBack(Array<plint, Descriptor<T>::d> forceIds_, T rho_=T() );
    
    MomentumExchangeBounceBack(HierarchicUnserializer& unserializer);

    virtual MomentumExchangeBounceBack<T,Descriptor>* clone() const;
    
    virtual int getId() const;
    
    virtual void serialize(HierarchicSerializer& serializer) const;

    virtual void unserialize(HierarchicUnserializer& unserializer);
    
/* *************** Collision, Equilibrium, and Non-equilibrium ******* */

    virtual void collide(Cell<T,Descriptor>& cell,
                         BlockStatistics& statistics_);

    virtual T computeEquilibrium(plint iPop, T rhoBar, Array<T,Descriptor<T>::d> const& j,
                                 T jSqr, T thetaBar=T()) const;

    virtual void regularize(Cell<T,Descriptor>& cell, T rhoBar, Array<T,Descriptor<T>::d> const& j,
                            T jSqr, Array<T,SymmetricTensor<T,Descriptor>::n> const& PiNeq, T thetaBar=T() ) const;

/* *************** Computation of macroscopic variables ************** */

    virtual T computeDensity(Cell<T,Descriptor> const& cell) const;
    virtual T computePressure(Cell<T,Descriptor> const& cell) const;
    virtual void computeVelocity( Cell<T,Descriptor> const& cell,
                                  Array<T,Descriptor<T>::d>& u ) const;
    virtual T computeTemperature(Cell<T,Descriptor> const& cell) const;
    virtual void computeDeviatoricStress (
        Cell<T,Descriptor> const& cell, Array<T,SymmetricTensor<T,Descriptor>::n>& PiNeq ) const;
    virtual void computeHeatFlux( Cell<T,Descriptor> const& cell,
                                  Array<T,Descriptor<T>::d>& q ) const;

    virtual void computeMoment( Cell<T,Descriptor> const& cell,
                                plint momentId, T* moment ) const;

/* *************** Access to Dynamics variables, e.g. omega ********** */

    virtual T getOmega() const;

    virtual void setOmega(T omega_);

/* *************** Switch between population and moment representation ****** */

    virtual plint numDecomposedVariables(plint order) const;

    virtual void decompose(Cell<T,Descriptor> const& cell, std::vector<T>& rawData, plint order) const;

    virtual void recompose(Cell<T,Descriptor>& cell, std::vector<T> const& rawData, plint order) const;

    virtual void rescale(std::vector<T>& rawData, T xDxInv, T xDt, plint order) const;

/* *************** Additional moments, intended for internal use ***** */

    virtual T computeRhoBar(Cell<T,Descriptor> const& cell) const;

    virtual void computeRhoBarJ(Cell<T,Descriptor> const& cell,
                                T& rhoBar, Array<T,Descriptor<T>::d>& j) const;

    virtual void computeRhoBarJPiNeq(Cell<T,Descriptor> const& cell,
                                     T& rhoBar, Array<T,Descriptor<T>::d>& j,
                                     Array<T,SymmetricTensor<T,Descriptor>::n>& PiNeq) const;
    virtual T computeEbar(Cell<T,Descriptor> const& cell) const;
public:
    void setFluidDirections(std::vector<plint> const& fluidDirections_);
    std::vector<plint> const& getFluidDirections() const;
private:
    std::vector<plint> fluidDirections;
    Array<plint, Descriptor<T>::d> forceIds;
    T rho;
private:
    static int id;
};

}  // namespace plb

#endif  // BOUNCE_BACK_MODELS_H