FreeCoolingAdhesiveDemo.cpp

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//Copyright (c) 2013-2014, The MercuryDPM Developers Team. All rights reserved.
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#include <iostream>
#include "Mercury2D.h"
#include "Particles/BaseParticle.h"
#include "Species/LinearViscoelasticSlidingFrictionReversibleAdhesiveSpecies.h"
#include "Walls/InfiniteWall.h"


class my_problem_HGRID : public Mercury2D{
public:
    
    void setupInitialConditions()
    {
        int N1=static_cast<int>(ceil(sqrt(N)));
        BaseParticle p0;
        p0.setRadius(0.0001);
        for (int i=0;i<N;i++)
        {
            int ix=static_cast<int>(i%N1);
            int iy=static_cast<int>(i/N1);
            
            double x=(getXMax()-getXMin())*(ix+1)/(N1+1);
            double y=(getYMax()-getYMin())*(iy+1)/(N1+1);
            
            
            p0.setPosition(Vec3D(x,y,0.0));
            Vec3D vel;
            vel.X=random.getRandomNumber(-1,1);
            vel.Y=random.getRandomNumber(-1,1);
            p0.setVelocity(1.0*vel);
            particleHandler.copyAndAddObject(p0);
            p0.setRadius(0.0001*random.getRandomNumber(0.7,1));
        }
        
        wallHandler.clear();
        InfiniteWall w0;
        w0.set(Vec3D(-1, 0, 0), Vec3D(getXMin(), 0, 0));
        wallHandler.copyAndAddObject(w0);
        w0.set(Vec3D( 1, 0, 0), Vec3D(getXMax(), 0, 0));
        wallHandler.copyAndAddObject(w0);
        w0.set(Vec3D( 0,-1, 0), Vec3D(0, getYMin(), 0));
        wallHandler.copyAndAddObject(w0);
        w0.set(Vec3D( 0, 1, 0), Vec3D(0, getYMax(), 0));
        wallHandler.copyAndAddObject(w0);
    }
    
    int N;
};

int main(int argc UNUSED, char *argv[] UNUSED)
{
    std::cout<<"In this file 32^2 particles with the same velocity are placed "
    "in a bi-axial box. This makes them collide with the walls and eachother. "
    "Afterwards the same run is performed with hgrid on. It tests the working "
    "(and speedup) of the hgrid."<<std::endl;
    
    my_problem_HGRID problem;
    auto species = problem.speciesHandler.copyAndAddObject(LinearViscoelasticSlidingFrictionReversibleAdhesiveSpecies());
    species->setDensity(2000);
    species->setDissipation(0.01);
    species->setStiffness(1e4);
    species->setSlidingFrictionCoefficient(0.1);
    species->setDensity(2000);
    species->setAdhesionStiffness(0.05* species->getStiffness());
    species->setAdhesionForceMax(1.1e-4*0.05* species->getStiffness());

    problem.N=25;
    problem.setName("free_cooling_adhesive");
    problem.setXMax(0.0018);
    problem.setYMax(0.0018);
    problem.setGravity(Vec3D(0.0,0.0,0.0));
    problem.setTimeStep(3e-6);
    problem.setSaveCount(50);
    problem.setTimeMax(0.05);
    problem.setHGridMaxLevels(1);
    //problem.setHGridCellOverSizeRatio(1.2);
    problem.setHGridUpdateEachTimeStep(true);

        
    problem.dataFile.setFileType(FileType::ONE_FILE);
    problem.fStatFile.setFileType(FileType::NO_FILE);
    problem.solve();
    std::cout << problem.particleHandler.getObject(0)->getRadius() << std::endl;
    std::cout << problem.particleHandler.getObject(0)->getInteractionRadius() << std::endl;
    return 0;
}