3_hybrid_solver.cpp

This is an example of how to use the netdem library.

#include "data_dumper.hpp"
#include "gen_pack.hpp"
#include "gen_wall_box_plane.hpp"
#include "gen_wall_box_plate.hpp"
#include "gravity.hpp"
#include "model_linear_spring.hpp"
#include "model_volume_based.hpp"
#include "shape_cylinder.hpp"
#include "shape_ellipsoid.hpp"
#include "shape_poly_super_ellipsoid.hpp"
#include "shape_poly_super_quadrics.hpp"
#include "shape_sphere.hpp"
#include "shape_spherical_harmonics.hpp"
#include "shape_trimesh.hpp"
#include "simulation.hpp"
#include <iostream>
#include <unordered_map>
using namespace netdem;
using namespace std;
 
int HybridSolver(int argc, char **argv) {
  int self_rank, total_rank;
  MPI_Init(&argc, &argv);
  MPI_Comm_rank(MPI_COMM_WORLD, &self_rank);
  MPI_Comm_size(MPI_COMM_WORLD, &total_rank);
 
  Simulation *sim = new Simulation();
 
  sim->domain_manager.SetBound(-0.6, -0.6, -0.6, 0.6, 0.6, 0.6);
  sim->domain_manager.SetDecomposition(total_rank, 1, 1);
  sim->domain_manager.SetCellSpacing(0.3, 0.3, 0.3);
 
  sim->dem_solver.contact_solver_factory.settings.sdf_potential_type = 0;
  LinearSpring cnt_model = LinearSpring(2.0e6, 1.0e6, 0.5, 0.01);
  sim->scene.InsertContactModel(&cnt_model);
  sim->scene.SetNumberOfMaterials(1);
  sim->scene.SetCollisionModel(0, 0, cnt_model.label);
 
  Ellipsoid ellipsoid(1, 1, 0.5);
  ellipsoid.SetSize(0.1);
  sim->scene.InsertShape(&ellipsoid);
 
  Cylinder cylinder(0.5, 1.0);
  cylinder.SetSize(0.1);
  sim->scene.InsertShape(&cylinder);
 
  PolySuperEllipsoid polysuperellipsoid(0.5, 1.0, 2.5, 0.5, 1.7, 0.5, 1.0, 1.5);
  polysuperellipsoid.SetSize(0.1);
  sim->scene.InsertShape(&polysuperellipsoid);
 
  TriMesh tri_mesh;
  tri_mesh.InitFromSTL("data/particle_template.stl");
  tri_mesh.Decimate(200);
  tri_mesh.AlignAxes();
  tri_mesh.SetSize(0.1);
  sim->scene.InsertShape(&tri_mesh);
 
  SphericalHarmonics sh;
  sh.InitFromSTL("data/particle_template.stl");
  sh.SetSize(0.1);
  sim->scene.InsertShape(&sh);
 
  VecXT<Particle> particle_list = PackGenerator::GetGridPack(
      1, 1, 0.2, 0, 0, 0.4, 5, 5, 1, sim->scene.GetShapes());
  for (auto &p : particle_list) {
    p.SetVelocity(0, 0, -2.0);
    p.damp_numerical = 0.0;
    p.damp_viscous = 0.0;
  }
 
  WallBoxPlane wall_box(1, 1, 1, 0, 0, 0);
  wall_box.ImportToScene(&(sim->scene));
 
  Gravity grav;
  grav.Init(sim);
  sim->modifier_manager.Insert(&grav);
  sim->modifier_manager.Enable(grav.label);
 
  DataDumper data_dumper;
  data_dumper.Init(sim);
  data_dumper.SetRootPath("tmp/out/");
  data_dumper.SetSaveByCycles(100);
  data_dumper.SaveShapeInfoAsSTL();
  data_dumper.dump_wall_info = true;
  data_dumper.dump_contact_info = true;
  sim->modifier_manager.Insert(&data_dumper);
  sim->modifier_manager.Enable(data_dumper.label);
 
  for (int i = 0; i < 10; i++) {
    sim->scene.InsertParticle(particle_list);
    sim->Run(0.1);
  }
  sim->Run(3.0);
 
  delete sim;
 
  MPI_Finalize();
  return 0;
}