obsolete_codes/GlasPeriodic.h

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// This file is part of the MercuryDPM project (https://www.mercurydpm.org).
// Copyright (c), The MercuryDPM Developers Team. All rights reserved.
// License: BSD 3-Clause License; see the LICENSE file in the root directory.
 
#include "scr/Chute.h"
//~ #include "scr/Time.h"
using namespace std;
 
class SilbertPeriodic : public Chute
{
public:
 
    SilbertPeriodic() {
        // Problem parameters
        setName("silbert");
        
        //time stepping
        setTimeStep(1e-4);
        setTimeMax(2000);
 
        //output parameters
        setSaveCount(50e4);
     
        //particle radii
        setInflowParticleRadius(.5);
        setFixedParticleRadius(.5);//getInflowParticleRadius());
        setRoughBottomType(MULTILAYER);
 
        //particle properties
        setDensity(6/pi);
        //~ setStiffnessAndRestitutionCoefficient(2e5,0.97,1);
        double tc=5e-3, r=0.97, beta=0.44, mu=0.092, mur=0.042;
        setCollisionTimeAndNormalAndTangentialRestitutionCoefficient(tc,r,beta,1.0,1.0);
        setSlidingFrictionCoefficient(mu);
        setSlidingFrictionCoefficientr();
        
        //chute properties
        setChuteAngle(24.0, 1.0);
        setChuteLength(20);
        setChuteWidth(10);
        set_H(20);
            
    }
    
    void fix_hgrid() {
        //assume 1-2 levels are optimal (which is the case for mono and bidispersed) and set the cell size to min and max 
        // !this is not optimal for polydispersed
        double minCell = 2.*min(getFixedParticleRadius(),getMinInflowParticleRadius());
        double maxCell = 2.*max(getFixedParticleRadius(),getMaxInflowParticleRadius());
        if ((minCell==maxCell)|(minCell==0.)) set_HGRID_max_levels(1);
        else set_HGRID_max_levels(2);
        set_HGRID_cell_to_cell_ratio (1.0000001*maxCell/minCell);
    }
 
    double getSlidingFrictionCoefficientBottom() { 
        if (speciesHandler.getNumberOfObjects()>1) return speciesHandler.getMixedObject(1,0)->getSlidingFrictionCoefficient(); 
        else return getSlidingFrictionCoefficient(); 
    }
    
    void setSlidingFrictionCoefficientBottom(double new_) { 
        createBaseSpecies(); 
        speciesHandler.getMixedObject(1, 0)->setSlidingFrictionCoefficient(new_); 
    }
    
    void createBaseSpecies() {
        //only create once
        static bool created=false;
        if (!created) {
            speciesHandler.copyAndAddObject(speciesHandler.getObject(0));
            created = true;
            for (int i=0; i<get_N(); i++) {
                if (Particles[i].is_fixed()) Particles[i].indSpecies=1;
            }
        }
    }
 
    void set_study() {
        stringstream name;
        name << "H" << getInflowHeight() 
             << "A" << getChuteAngleDegrees() 
             << "L" << round(100.*getFixedParticleRadius()*2.)/100.
             << "M" << getSlidingFrictionCoefficient()
             << "B" << getSlidingFrictionCoefficientBottom();
        setName(name.str().c_str());
        set_data_filename();
    }
 
    void set_study(int study_num) {
        //S=0-5: lambda = 0, 3./6., 4./6., 5./6., 1, 2
        //S=6-8: mu = 0, 1, inf
        //S=9-13: mub = 0,1,inf,1/4,1/8
        //S=14-15: mu = 1/4, 1/8
        //S=16-19: lambda = 1./6., 2./6., 1.5, 4
        //S=21-25: mub=1/16,1/32,1/64,1/128,1/1024
        //S=26-28: lambda=1/2, mub=1/16,1/128,1/1024
        //S=29-32: lambda=0, mub=1/16,1/128,1/1024,0
        
        if (study_num < 6) {
            // set mu_all = 0.5, vary lambda
            double Lambdas[] = {0, 3./6., 4./6., 5./6., 1, 2};
            setFixedParticleRadius(Lambdas[study_num]/2.);
        } else {
            //If study_num is complete quit
            cout << "Study is complete " << endl;
            exit(0);
        }
        //Note make sure h and a is defined
        set_study(); 
    }
    
    void set_study(vector<int> study_num) {
        double Heights[] = {10, 20, 30, 40};
        double Angles[] = {20, 22, 24, 26, 28, 30, 40, 50, 60};
        setInflowHeight(Heights[study_num[1]-1]);
        setChuteAngle(Angles[study_num[2]-1]);
        set_study(study_num[0]);
    }
 
    //Do not add or remove particles
    void actionsBeforeTimeStep() override { };
        
    //Set up periodic walls, rough bottom, add flow particles
    void setupInitialConditions() override
    {
        fix_hgrid();
        set_Nmax(get_N()+getChuteLength()*getChuteWidth()*getZMax());//why is this line needed?
        
        createBottom();
        //~ write(std::cout,false);
        //cout << "correct fixed" << endl;
        if (Species.size()>1) {
            for (int i=0; i<get_N(); i++)
                if (Particles[i].is_fixed()) 
                    Particles[i].indSpecies=1;
        }
 
        set_NWall(1);
        if (getFixedParticleRadius()) {
            wallHandler.getObject(0)->set(Vec3D(0,0,-1), 3.4*MaxInflowParticleRadius);
        } else {
            wallHandler.getObject(0)->set(Vec3D(0,0,-1), 0.);
        }
 
        set_NWallPeriodic(2);
        WallsPeriodic[0].set(Vec3D( 1.0, 0.0, 0.0), getXMin(), getXMax());
        WallsPeriodic[1].set(Vec3D( 0.0, 1.0, 0.0), getYMin(), getYMax());
        
        add_flow_particles();
 
        cout << endl << "Status before solve:" << endl;
        cout 
            << "tc=" << getCollisionTime() 
            << ", eps=" << getRestitutionCoefficient()
            << ", vmax=" << getMaximumVelocity()
            << ", InflowHeight/zmax=" << getInflowHeight()/getZMax()
            << endl << endl;
        //~ timer.set(t,tmax);
 
        //optimize number of buckets
        cout << "Nmax" << get_Nmax() << endl;
        set_HGRID_num_buckets_to_power(get_N()*1.5);
    }
 
    //add flow particles
    void add_flow_particles() 
    {
                set_HGRID_num_buckets_to_power(get_Nmax());
                hGridActionsBeforeTimeLoop();
                hGridActionsBeforeTimeStep();
                unsigned int N=get_N()+getChuteLength()*getChuteWidth()*InflowHeight;
        set_Nmax(N);
        double H = InflowHeight;
        setZMax(1.2*InflowHeight);
        
        writeRestartFile();
        //try to find new insertable particles
        while (Particles.size()<N){
            create_inflow_particle();
            if (IsInsertable(P0)) {
                num_created++;
            } else InflowHeight += .0001* MaxInflowParticleRadius;
        }
        InflowHeight = H;
        set_HGRID_num_buckets_to_power();
        write(std::cout,false);
    }
    
    //defines type of flow particles    
    void create_inflow_particle()
    {
        P0.Radius = MaxInflowParticleRadius;
        P0.computeMass(Species);
        
        P0.Position.X = random(getXMin()+2.0*P0.Radius,getXMax());
        P0.Position.Y = random(getYMin()+2.0*P0.Radius,getYMax());
        P0.Position.Z = random(getZMin()+2.0*P0.Radius,getInflowHeight());
        P0.Velocity = Vec3D(0.0,0.0,0.0);
    }
 
    //set approximate height of flow
    void set_H(double new_) {InflowHeight=new_; setZMax(InflowHeight);}
    double get_H() {return InflowHeight;}
 
    void printTime() {
        cout << "t=" << setprecision(3) << left << setw(6) << getTime() 
            << ", tmax=" << setprecision(3) << left << setw(6) << getTimeMax()
            << ", N=" << setprecision(3) << left << setw(6) << Particles.size()
            //<< ", time left=" << setprecision(3) << left << setw(6) << timer.getTime2Finish(t)
            //~ << ", finish by " << setprecision(3) << left << setw(6) << timer.getFinishTime(t)
            << ". " << endl;
    }
    
    int readNextArgument(unsigned int& i, unsigned int& argc, char *argv[]) {
        if (!strcmp(argv[i],"-muBottom")) {
            setSlidingFrictionCoefficientBottom(atof(argv[i+1]));
            cout << "muB=" << getSlidingFrictionCoefficientBottom() << endl;
        } else return Chute::readNextArgument(i, argc, argv); //if argv[i] is not found, check the commands in Chute
        return true; //returns true if argv[i] is found
    }
};