LiquidBridgeWilletInteraction.cc

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//Copyright (c) 2013-2014, The MercuryDPM Developers Team. All rights reserved.
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#include "LiquidBridgeWilletInteraction.h"
#include "Species/AdhesiveForceSpecies/LiquidBridgeWilletSpecies.h"
#include "Particles/BaseParticle.h"
#include "InteractionHandler.h"
#include <iomanip>
#include <fstream>

LiquidBridgeWilletInteraction::LiquidBridgeWilletInteraction(BaseInteractable* P, BaseInteractable* I, Mdouble timeStamp)
    : BaseInteraction(P, I, timeStamp)
{
    wasInContact_=false;
#ifdef DEBUG_CONSTRUCTOR
    std::cout<<"LiquidBridgeWilletInteraction::LiquidBridgeWilletInteraction() finished"<<std::endl;
#endif
}
LiquidBridgeWilletInteraction::LiquidBridgeWilletInteraction(const LiquidBridgeWilletInteraction &p)
    : BaseInteraction(p)
{
    wasInContact_=p.wasInContact_;
#ifdef DEBUG_CONSTRUCTOR
    std::cout<<"LiquidBridgeWilletInteraction::LiquidBridgeWilletInteraction(const LiquidBridgeWilletInteraction &p finished"<<std::endl;
#endif
}
LiquidBridgeWilletInteraction::~LiquidBridgeWilletInteraction()
{
#ifdef DEBUG_DESTRUCTOR
    std::cout<<"LiquidBridgeWilletInteraction::~LiquidBridgeWilletInteraction() finished"<<std::endl;
#endif
}
void LiquidBridgeWilletInteraction::write(std::ostream& os) const
{
    os << " wasInContact " << wasInContact_;
}
void LiquidBridgeWilletInteraction::read(std::istream& is)
{
    // we read in wasInContact_ like this because an early version did not initialize it.
    std::string dummy;
    int dummy2;
    is >> dummy >> dummy2;
    if (dummy2==1)
        wasInContact_ = true;
    else
        wasInContact_ = false;
}
void LiquidBridgeWilletInteraction::computeAdhesionForce()
{
    const LiquidBridgeWilletSpecies* species = getSpecies();
    if (getOverlap()>=0)
    {
        wasInContact_=true;
        Mdouble effectiveRadius = 2.0*getEffectiveRadius();
        Mdouble fdotn = -2.0*constants::pi*effectiveRadius*species->getSurfaceTension()*std::cos(species->getContactAngle());
        addForce(getNormal() * fdotn);
    }
    else if (wasInContact_)
    {
        Mdouble effectiveRadius = 2.0*getEffectiveRadius();
        Mdouble s_c = -getOverlap()*std::sqrt(effectiveRadius/species->getLiquidBridgeVolume());
        Mdouble fdotn = -2.0*constants::pi*effectiveRadius*species->getSurfaceTension()
            *std::cos(species->getContactAngle())/(1+(1.05+2.5*s_c)*s_c);
        addForce(getNormal() * fdotn);
    }
}
Mdouble LiquidBridgeWilletInteraction::getElasticEnergy() const
{
    return 0.0;
}
const LiquidBridgeWilletSpecies* LiquidBridgeWilletInteraction::getSpecies() const
{
    return dynamic_cast<const LiquidBridgeWilletSpecies *>(getBaseSpecies());
}
std::string LiquidBridgeWilletInteraction::getBaseName() const
{
    return "LiquidBridgeWillet";
}