ThermalInteraction.h

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//Copyright (c) 2013-2014, The MercuryDPM Developers Team. All rights reserved.
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#ifndef THERMALINTERACTION_H
#define THERMALINTERACTION_H

#include "Interactions/BaseInteraction.h"
#include "Particles/ThermalParticle.h"

template<class NormalForceSpecies>
class ThermalSpecies;

template<class NormalForceInteraction>
class ThermalInteraction : public NormalForceInteraction
{
public:
    typedef ThermalSpecies<typename NormalForceInteraction::SpeciesType> SpeciesType;

    ThermalInteraction(BaseInteractable* P, BaseInteractable* I, Mdouble timeStamp);
    ThermalInteraction(const ThermalInteraction &p);
    virtual ~ThermalInteraction();
    void computeNormalForce();
//    /*!
//     * \brief Interaction read function, which accepts an std::istream as input.
//     */
//    virtual void read(std::istream& is);
//    /*!
//     * \brief Interaction write function, which accepts an std::ostream as input.
//     */
//    virtual void write(std::ostream& os) const;
//    /*!
//     * \brief Returns the name of the interaction.
//     */
//    virtual std::string getBaseName() const;
//    /*!
//     * \brief
//     */
//    const ThermalInteraction<NormalForceInteraction>* getSpecies() const;
};

template<class NormalForceInteraction>
ThermalInteraction<NormalForceInteraction>::ThermalInteraction(BaseInteractable* P, BaseInteractable* I, Mdouble timeStamp)
 : BaseInteraction(P, I, timeStamp), NormalForceInteraction(P, I, timeStamp)

{}

template<class NormalForceInteraction>
ThermalInteraction<NormalForceInteraction>::ThermalInteraction(const ThermalInteraction &p)
 : BaseInteraction(p), NormalForceInteraction(p)
{}

template<class NormalForceInteraction>
ThermalInteraction<NormalForceInteraction>::~ThermalInteraction()
{}

//template<class NormalForceInteraction>
//const SpeciesType* ThermalInteraction<NormalForceInteraction>::getSpecies() const
//{
//    return dynamic_cast<const SpeciesType*>(getBaseSpecies());
//}

template<class NormalForceInteraction>
void ThermalInteraction<NormalForceInteraction>::computeNormalForce()
{
    NormalForceInteraction::computeNormalForce();
    Mdouble radius = 2.0*NormalForceInteraction::getEffectiveRadius();
    Mdouble contactArea = constants::pi*radius*NormalForceInteraction::getOverlap();
    const SpeciesType* species = dynamic_cast<const SpeciesType*>(NormalForceInteraction::getBaseSpecies());
    ThermalParticle* pParticle = dynamic_cast<ThermalParticle*>(NormalForceInteraction::getP());
    ThermalParticle* iParticle = dynamic_cast<ThermalParticle*>(NormalForceInteraction::getI());
    // if both p and i are particles
    if (pParticle && iParticle) {
        /* heat transfer rate Q=m*c*dT/dt */
        Mdouble heatTransfer = species->getThermalConductivity()
                               * (pParticle->getTemperature() - iParticle->getTemperature())
                               * contactArea / NormalForceInteraction::getDistance();
        /* m*dT = Q/c*dt */
        Mdouble mdT = heatTransfer / species->getHeatCapacity()
                       * NormalForceInteraction::getHandler()->getDPMBase()->getTimeStep();
        pParticle->addTemperature(-mdT*pParticle->getInvMass());
        iParticle->addTemperature( mdT*iParticle->getInvMass());
    }
}
#endif