0_geometric_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 "gravity.hpp"
#include "model_hertz_mindlin.hpp"
#include "model_linear_spring.hpp"
#include "shape_ellipsoid.hpp"
#include "shape_sphere.hpp"
#include "simulation.hpp"
#include <iostream>
#include <unordered_map>
using namespace netdem;
using namespace std;
 
int GeometricSolver(int argc, char **argv) {
  int total_rank;
  MPI_Init(&argc, &argv);
  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(
      int(sqrt(total_rank)), int(total_rank / int(sqrt(total_rank))), 1);
  sim->domain_manager.SetCellSpacing(0.3, 0.3, 0.3);
 
  LinearSpring cnt_model = LinearSpring(2.0e5, 1.0e5, 0.5, 0.7);
  // HertzMindlin cnt_model = HertzMindlin(1.7e9, 1.0e5, 0.5, 0.7);
  sim->scene.InsertContactModel(&cnt_model);
  sim->scene.SetNumberOfMaterials(1);
  sim->scene.SetCollisionModel(0, 0, cnt_model.label);
 
  Sphere sphere = Sphere(0.05);
  sim->scene.InsertShape(&sphere);
 
  VecXT<Particle> particle_list = PackGenerator::GetGridPack(
      1, 1, 1, 0, 0, 0, 19, 19, 19, sim->scene.GetShapes());
  sim->scene.InsertParticle(particle_list);
 
  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);
 
  sim->Run(0.5);
 
  sim->domain_manager.SetBound(-0.6, -0.6, -0.6, 0.6, 0.6, 0.5);
 
  sim->Run(1.5);
 
  delete sim;
 
  MPI_Finalize();
 
  return 0;
}