main.cpp

#include <PastisUtils.hpp>
#include <PastisOStream.hpp>

#include <rang.hpp>

#include <Connectivity.hpp>

#include <Mesh.hpp>
#include <BoundaryCondition.hpp>
#include <AcousticSolver.hpp>

#include <VTKWriter.hpp>

#include <Timer.hpp>

#include <TinyVector.hpp>
#include <TinyMatrix.hpp>

#include <BoundaryConditionDescriptor.hpp>

#include <MeshNodeBoundary.hpp>

#include <GmshReader.hpp>

#include <limits>
#include <map>

int main(int argc, char *argv[])
{
  std::string filename = initialize(argc, argv);

  std::map<std::string, double> method_cost_map;

  try  {
    if (filename != "") {
      pout() << "Reading (gmsh) " << rang::style::underline << filename << rang::style::reset << " ...\n";
      Timer gmsh_timer;
      gmsh_timer.reset();
      GmshReader gmsh_reader(filename);
      method_cost_map["Mesh building"] = gmsh_timer.seconds();

      std::shared_ptr<IMesh> p_mesh = gmsh_reader.mesh();

      switch (p_mesh->meshDimension()) {
        case 1: {
          std::vector<std::string> sym_boundary_name_list = {"XMIN", "XMAX"};
          std::vector<std::shared_ptr<BoundaryConditionDescriptor>> bc_descriptor_list;
          for (const auto& sym_boundary_name : sym_boundary_name_list){
            std::shared_ptr<BoundaryDescriptor> boudary_descriptor
                = std::shared_ptr<BoundaryDescriptor>(new NamedBoundaryDescriptor(sym_boundary_name));
            SymmetryBoundaryConditionDescriptor* sym_bc_descriptor
                = new SymmetryBoundaryConditionDescriptor(boudary_descriptor);

            bc_descriptor_list.push_back(std::shared_ptr<BoundaryConditionDescriptor>(sym_bc_descriptor));
          }

          using ConnectivityType = Connectivity1D;
          using MeshType = Mesh<ConnectivityType>;
          using MeshDataType = MeshData<MeshType>;
          using UnknownsType = FiniteVolumesEulerUnknowns<MeshDataType>;

          const MeshType& mesh = dynamic_cast<const MeshType&>(*gmsh_reader.mesh());

          Timer timer;
          timer.reset();
          MeshDataType mesh_data(mesh);

          std::vector<BoundaryConditionHandler> bc_list;
          {
            for (const auto& bc_descriptor : bc_descriptor_list) {
              switch (bc_descriptor->type()) {
                case BoundaryConditionDescriptor::Type::symmetry: {
                  const SymmetryBoundaryConditionDescriptor& sym_bc_descriptor
                      = dynamic_cast<const SymmetryBoundaryConditionDescriptor&>(*bc_descriptor);
                  for (size_t i_ref_node_list=0; i_ref_node_list<mesh.connectivity().numberOfRefNodeList();
                       ++i_ref_node_list) {
                    const RefNodeList& ref_node_list = mesh.connectivity().refNodeList(i_ref_node_list);
                    const RefId& ref = ref_node_list.refId();
                    if (ref == sym_bc_descriptor.boundaryDescriptor()) {
                      SymmetryBoundaryCondition<MeshType::dimension>* sym_bc
                          = new SymmetryBoundaryCondition<MeshType::dimension>(MeshFlatNodeBoundary<MeshType::dimension>(mesh, ref_node_list));
                      std::shared_ptr<SymmetryBoundaryCondition<MeshType::dimension>> bc(sym_bc);
                      bc_list.push_back(BoundaryConditionHandler(bc));
                    }
                  }
                  break;
                }
                default: {
                  perr() << "Unknown BCDescription\n";
                  std::exit(1);
                }
              }
            }
          }

          UnknownsType unknowns(mesh_data);

          unknowns.initializeSod();

          AcousticSolver<MeshDataType> acoustic_solver(mesh_data, bc_list);

          using Rd = TinyVector<MeshType::dimension>;

          const CellValue<const double>& Vj = mesh_data.Vj();

          const double tmax=0.2;
          double t=0;

          int itermax=std::numeric_limits<int>::max();
          int iteration=0;

          CellValue<double>& rhoj = unknowns.rhoj();
          CellValue<double>& ej = unknowns.ej();
          CellValue<double>& pj = unknowns.pj();
          CellValue<double>& gammaj = unknowns.gammaj();
          CellValue<double>& cj = unknowns.cj();

          BlockPerfectGas block_eos(rhoj, ej, pj, gammaj, cj);

          VTKWriter vtk_writer("mesh", 0.01);

          while((t<tmax) and (iteration<itermax)) {
            vtk_writer.write(mesh, {NamedItemValue{"density", rhoj},
                                    NamedItemValue{"velocity", unknowns.uj()},
                                    NamedItemValue{"coords", mesh.xr()},
                                    NamedItemValue{"cell_owner", mesh.connectivity().cellOwner()},
                                    NamedItemValue{"node_owner", mesh.connectivity().nodeOwner()}},t);
            double dt = 0.4*acoustic_solver.acoustic_dt(Vj, cj);
            if (t+dt>tmax) {
              dt=tmax-t;
            }
            acoustic_solver.computeNextStep(t,dt, unknowns);

            block_eos.updatePandCFromRhoE();

            t += dt;
            ++iteration;
          }
          vtk_writer.write(mesh, {NamedItemValue{"density", rhoj},
                                  NamedItemValue{"velocity", unknowns.uj()},
                                  NamedItemValue{"coords", mesh.xr()},
                                  NamedItemValue{"cell_owner", mesh.connectivity().cellOwner()},
                                  NamedItemValue{"node_owner", mesh.connectivity().nodeOwner()}}, t, true); // forces last output

          pout() << "* " << rang::style::underline << "Final time" << rang::style::reset
                    << ":  " << rang::fgB::green << t << rang::fg::reset << " (" << iteration << " iterations)\n";

          method_cost_map["AcousticSolverWithMesh"] = timer.seconds();

          { // gnuplot output for density
            const CellValue<const Rd>& xj = mesh_data.xj();
            const CellValue<const double>& rhoj = unknowns.rhoj();
            std::ofstream fout("rho");
            for (CellId j=0; j<mesh.numberOfCells(); ++j) {
              fout << xj[j][0] << ' ' << rhoj[j] << '\n';
            }
          }

          break;
        }
        case 2: {
          // test case boundary condition description
          std::vector<std::string> sym_boundary_name_list = {"XMIN", "XMAX", "YMIN", "YMAX"};
          std::vector<std::shared_ptr<BoundaryConditionDescriptor>> bc_descriptor_list;
          for (const auto& sym_boundary_name : sym_boundary_name_list){
            std::shared_ptr<BoundaryDescriptor> boudary_descriptor
                = std::shared_ptr<BoundaryDescriptor>(new NamedBoundaryDescriptor(sym_boundary_name));
            SymmetryBoundaryConditionDescriptor* sym_bc_descriptor
                = new SymmetryBoundaryConditionDescriptor(boudary_descriptor);

            bc_descriptor_list.push_back(std::shared_ptr<BoundaryConditionDescriptor>(sym_bc_descriptor));
          }

          using ConnectivityType = Connectivity2D;
          using MeshType = Mesh<ConnectivityType>;
          using MeshDataType = MeshData<MeshType>;
          using UnknownsType = FiniteVolumesEulerUnknowns<MeshDataType>;

          const MeshType& mesh = dynamic_cast<const MeshType&>(*gmsh_reader.mesh());

          Timer timer;
          timer.reset();
          MeshDataType mesh_data(mesh);

          std::vector<BoundaryConditionHandler> bc_list;
          {
            for (const auto& bc_descriptor : bc_descriptor_list) {
              switch (bc_descriptor->type()) {
                case BoundaryConditionDescriptor::Type::symmetry: {
                  const SymmetryBoundaryConditionDescriptor& sym_bc_descriptor
                      = dynamic_cast<const SymmetryBoundaryConditionDescriptor&>(*bc_descriptor);
                  for (size_t i_ref_face_list=0; i_ref_face_list<mesh.connectivity().numberOfRefFaceList();
                       ++i_ref_face_list) {
                    const RefFaceList& ref_face_list = mesh.connectivity().refFaceList(i_ref_face_list);
                    const RefId& ref = ref_face_list.refId();
                    if (ref == sym_bc_descriptor.boundaryDescriptor()) {
                      SymmetryBoundaryCondition<MeshType::dimension>* sym_bc
                          = new SymmetryBoundaryCondition<MeshType::dimension>(MeshFlatNodeBoundary<MeshType::dimension>(mesh, ref_face_list));
                      std::shared_ptr<SymmetryBoundaryCondition<MeshType::dimension>> bc(sym_bc);
                      bc_list.push_back(BoundaryConditionHandler(bc));
                    }
                  }
                  break;
                }
                default: {
                  perr() << "Unknown BCDescription\n";
                  std::exit(1);
                }
              }
            }
          }

          UnknownsType unknowns(mesh_data);

          unknowns.initializeSod();

          AcousticSolver<MeshDataType> acoustic_solver(mesh_data, bc_list);

          const CellValue<const double>& Vj = mesh_data.Vj();

          const double tmax=0.2;
          double t=0;

          int itermax=std::numeric_limits<int>::max();
          int iteration=0;

          CellValue<double>& rhoj = unknowns.rhoj();
          CellValue<double>& ej = unknowns.ej();
          CellValue<double>& pj = unknowns.pj();
          CellValue<double>& gammaj = unknowns.gammaj();
          CellValue<double>& cj = unknowns.cj();

          BlockPerfectGas block_eos(rhoj, ej, pj, gammaj, cj);

          VTKWriter vtk_writer("mesh", 0.01);

          while((t<tmax) and (iteration<itermax)) {
            vtk_writer.write(mesh, {NamedItemValue{"density", rhoj},
                                    NamedItemValue{"velocity", unknowns.uj()},
                                    NamedItemValue{"coords", mesh.xr()},
                                    NamedItemValue{"cell_owner", mesh.connectivity().cellOwner()},
                                    NamedItemValue{"node_owner", mesh.connectivity().nodeOwner()}}, t);
            double dt = 0.4*acoustic_solver.acoustic_dt(Vj, cj);
            if (t+dt>tmax) {
              dt=tmax-t;
            }
            acoustic_solver.computeNextStep(t,dt, unknowns);

            block_eos.updatePandCFromRhoE();

            t += dt;
            ++iteration;
          }
          vtk_writer.write(mesh, {NamedItemValue{"density", rhoj},
                                  NamedItemValue{"velocity", unknowns.uj()},
                                  NamedItemValue{"coords", mesh.xr()},
                                  NamedItemValue{"cell_owner", mesh.connectivity().cellOwner()},
                                  NamedItemValue{"node_owner", mesh.connectivity().nodeOwner()}}, t, true); // forces last output

          pout() << "* " << rang::style::underline << "Final time" << rang::style::reset
                    << ":  " << rang::fgB::green << t << rang::fg::reset << " (" << iteration << " iterations)\n";

          method_cost_map["AcousticSolverWithMesh"] = timer.seconds();
          break;
        }
        case 3: {
          std::vector<std::string> sym_boundary_name_list = {"XMIN", "XMAX", "YMIN", "YMAX", "ZMIN", "ZMAX"};
          std::vector<std::shared_ptr<BoundaryConditionDescriptor>> bc_descriptor_list;
          for (const auto& sym_boundary_name : sym_boundary_name_list){
            std::shared_ptr<BoundaryDescriptor> boudary_descriptor
                = std::shared_ptr<BoundaryDescriptor>(new NamedBoundaryDescriptor(sym_boundary_name));
            SymmetryBoundaryConditionDescriptor* sym_bc_descriptor
                = new SymmetryBoundaryConditionDescriptor(boudary_descriptor);

            bc_descriptor_list.push_back(std::shared_ptr<BoundaryConditionDescriptor>(sym_bc_descriptor));
          }

          using ConnectivityType = Connectivity3D;
          using MeshType = Mesh<ConnectivityType>;
          using MeshDataType = MeshData<MeshType>;
          using UnknownsType = FiniteVolumesEulerUnknowns<MeshDataType>;

          const MeshType& mesh = dynamic_cast<const MeshType&>(*gmsh_reader.mesh());

          Timer timer;
          timer.reset();
          MeshDataType mesh_data(mesh);

          std::vector<BoundaryConditionHandler> bc_list;
          {
            for (const auto& bc_descriptor : bc_descriptor_list) {
              switch (bc_descriptor->type()) {
                case BoundaryConditionDescriptor::Type::symmetry: {
                  const SymmetryBoundaryConditionDescriptor& sym_bc_descriptor
                      = dynamic_cast<const SymmetryBoundaryConditionDescriptor&>(*bc_descriptor);
                  for (size_t i_ref_face_list=0; i_ref_face_list<mesh.connectivity().numberOfRefFaceList();
                       ++i_ref_face_list) {
                    const RefFaceList& ref_face_list = mesh.connectivity().refFaceList(i_ref_face_list);
                    const RefId& ref = ref_face_list.refId();
                    if (ref == sym_bc_descriptor.boundaryDescriptor()) {
                      SymmetryBoundaryCondition<MeshType::dimension>* sym_bc
                          = new SymmetryBoundaryCondition<MeshType::dimension>(MeshFlatNodeBoundary<MeshType::dimension>(mesh, ref_face_list));
                      std::shared_ptr<SymmetryBoundaryCondition<MeshType::dimension>> bc(sym_bc);
                      bc_list.push_back(BoundaryConditionHandler(bc));
                    }
                  }
                  break;
                }
                default: {
                  perr() << "Unknown BCDescription\n";
                  std::exit(1);
                }
              }
            }
          }

          UnknownsType unknowns(mesh_data);

          unknowns.initializeSod();

          AcousticSolver<MeshDataType> acoustic_solver(mesh_data, bc_list);

          const CellValue<const double>& Vj = mesh_data.Vj();

          const double tmax=0.2;
          double t=0;

          int itermax=std::numeric_limits<int>::max();
          int iteration=0;

          CellValue<double>& rhoj = unknowns.rhoj();
          CellValue<double>& ej = unknowns.ej();
          CellValue<double>& pj = unknowns.pj();
          CellValue<double>& gammaj = unknowns.gammaj();
          CellValue<double>& cj = unknowns.cj();

          BlockPerfectGas block_eos(rhoj, ej, pj, gammaj, cj);

          VTKWriter vtk_writer("mesh", 0.01);

          while((t<tmax) and (iteration<itermax)) {
            vtk_writer.write(mesh, {NamedItemValue{"density", rhoj},
                                    NamedItemValue{"velocity", unknowns.uj()},
                                    NamedItemValue{"coords", mesh.xr()},
                                    NamedItemValue{"cell_owner", mesh.connectivity().cellOwner()},
                                    NamedItemValue{"node_owner", mesh.connectivity().nodeOwner()}}, t);
            double dt = 0.4*acoustic_solver.acoustic_dt(Vj, cj);
            if (t+dt>tmax) {
              dt=tmax-t;
            }
            acoustic_solver.computeNextStep(t,dt, unknowns);
            block_eos.updatePandCFromRhoE();

            t += dt;
            ++iteration;
          }
          vtk_writer.write(mesh, {NamedItemValue{"density", rhoj},
                                  NamedItemValue{"velocity", unknowns.uj()},
                                  NamedItemValue{"coords", mesh.xr()},
                                  NamedItemValue{"cell_owner", mesh.connectivity().cellOwner()},
                                  NamedItemValue{"node_owner", mesh.connectivity().nodeOwner()}}, t, true); // forces last output

          pout() << "* " << rang::style::underline << "Final time" << rang::style::reset
                    << ":  " << rang::fgB::green << t << rang::fg::reset << " (" << iteration << " iterations)\n";

          method_cost_map["AcousticSolverWithMesh"] = timer.seconds();
          break;
        }
      }

      pout() << "* "  << rang::fgB::red << "Could not be uglier!" << rang::fg::reset << " (" << __FILE__ << ':' << __LINE__ << ")\n";

    } else {
      perr() << "Connectivity1D defined by number of nodes no more implemented\n";
      std::exit(0);
    }
  }
  catch (const AssertError& error) {
    perr() << error << '\n';
    std::exit(1);
  }

  finalize();

  std::string::size_type size=0;
  for (const auto& method_cost : method_cost_map) {
    size = std::max(size, method_cost.first.size());
  }

  for (const auto& method_cost : method_cost_map) {
    pout() << "* ["
              << rang::fgB::cyan
              << std::setw(size) << std::left
              << method_cost.first
              << rang::fg::reset
              << "] Execution time: "
              << rang::style::bold
              << method_cost.second
              << rang::style::reset << '\n';
  }

  return 0;
}