Particles on a chute with a multilayered bottom

Problem description:

File roughBottomDemo.cpp treats particles cascading down an inclined chute with a rough bottom consisting of multiple layers of fixed particles. The entire code of this problem can be viewed here: Particles on a chute with a multilayered bottom (code).

Headers

#include <sstream>
#include <Species/LinearViscoelasticSpecies.h>
#include "Chute.h"

Before the main function

Main function

int main()
{
    //Print description
    logger(INFO, "\nDemo of the chute flow with a rough bottom");
    
    //Construct the problem and assign a name
    Chute roughBottomSelfTest;
    roughBottomSelfTest.setName("roughBottomMultiLayer");
 
 
    //Set time stepping parameters
    roughBottomSelfTest.setTimeStep(1e-4);
    roughBottomSelfTest.setTimeMax(0.1);
 
    //Set output parameter: write to the output files every 50 time steps
    roughBottomSelfTest.setSaveCount(50);
 
    //Set the particle radii and the type of the rough bottom
    roughBottomSelfTest.setInflowParticleRadius(0.5);
    roughBottomSelfTest.setFixedParticleRadius(0.5);
    roughBottomSelfTest.setRoughBottomType(MULTILAYER);
 
    //Set the particle properties
    LinearViscoelasticSpecies* species = roughBottomSelfTest.speciesHandler.copyAndAddObject(LinearViscoelasticSpecies());
    species->setDensity(6.0/constants::pi);
    species->setStiffness(2e5);
    species->setDissipation(25.0);
 
    //Set the chute properties
    roughBottomSelfTest.setChuteAngleAndMagnitudeOfGravity(24.0, 1.0);
    roughBottomSelfTest.setChuteLength(3.0);
    roughBottomSelfTest.setChuteWidth(3.0);
 
    //Solve the system
    roughBottomSelfTest.solve();
}

Reference:

Thornton, A. R., Weinhart, T., Luding, S., & Bokhove, O. (2012). Frictional dependence of shallow-granular flows from discrete particle simulations. The European Physical Journal E, 35(12), 127.
Weinhart, T., Thornton, A. R., Luding, S., & Bokhove, O. (2012). Closure relations for shallow granular flows from particle simulations. Granular matter, 14(4), 531-552.

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