TangentialSpringUnitTest.cpp

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//Copyright (c) 2013-2014, The MercuryDPM Developers Team. All rights reserved.
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#include <iostream>
#include "Species/LinearViscoelasticSlidingFrictionSpecies.h"
#include "DPMBase.h"
#include "Particles/BaseParticle.h"
#include "Logger.h"

class TangentialSpringUnitTest : public DPMBase {
public:
    void setupInitialConditions()
    {
        setXMax(1);
        setYMax(1);
        setZMax(1);
        setSystemDimensions(3);
        setParticleDimensions(3);
        
        BaseParticle P0,P1;
        
        P0.setPosition(Vec3D(0.5,0.5,0.25));
        P1.setPosition(Vec3D(0.5,0.5,0.75));
    
        P0.fixParticle();
        P1.setVelocity(Vec3D(0.1,0.0,0.0));
    
        P0.setRadius(0.25);
        P1.setRadius(0.25);
        
        particleHandler.copyAndAddObject(P0);
        particleHandler.copyAndAddObject(P1);       
    }
};

Logger<Log::ERROR> testLogger("Tangential Spring Unit Test");

int main(int argc, char *argv[])
{

    TangentialSpringUnitTest tangentialSpringUnitTestProblem;
    auto species = tangentialSpringUnitTestProblem.speciesHandler.copyAndAddObject(LinearViscoelasticSlidingFrictionSpecies());
    tangentialSpringUnitTestProblem.setName("TangentialSpringUnitTest");
    species->setDensity(6./constants::pi);
    species->setCollisionTimeAndRestitutionCoefficient(1e-3,.2,1./8);
    species->setSlidingStiffness(species->getStiffness()*2/7);
    species->setSlidingFrictionCoefficient(1e20);
    tangentialSpringUnitTestProblem.setTimeStep(2e-5);
    //tangentialSpringUnitTestProblem.setFileType(FileType::NO_FILE);
    tangentialSpringUnitTestProblem.setGravity(Vec3D(0,0,-1));
    tangentialSpringUnitTestProblem.setTimeMax(2.5);
    tangentialSpringUnitTestProblem.solve(argc,argv);
    
    std::vector<BaseParticle*>::iterator pIt = tangentialSpringUnitTestProblem.particleHandler.begin();
    
    if (!(*pIt)->getPosition().isEqualTo(Vec3D(0.5,0.5,0.25), 1e-7))  logger(FATAL, "First particles is in the wrong position. It is %",(*pIt)->getPosition());
    if (!(*pIt)->getVelocity().isEqualTo(Vec3D(0.0,0.0,0.0)  , 1e-7))  logger(FATAL, "First particle has the wrong velocity");
    ++pIt;

    if (!((*pIt)->getPosition().isEqualTo(Vec3D(0.961524052956078, 0.5, 0.450153103106219), 1e-7)))      logger(FATAL, "Second particle has the wrong position. It is % at time %",(*pIt)->getPosition(),tangentialSpringUnitTestProblem.getTime());
    if (!(*pIt)->getVelocity().isEqualTo(Vec3D(0.325869890236916, 0, -0.623251003973752)    , 1e-7))  logger(FATAL, "Second particle has the wrong velocity. It is %",(*pIt)->getVelocity());
    if (!(*pIt)->getAngularVelocity().isEqualTo(Vec3D(0.0,2.11896618998424,0.0)    , 1e-7))  logger(FATAL, "Second particles has the wrong angular velocity. It is %", (*pIt)->getAngularVelocity());

}