Line data    Source code

       1             : //* This file is part of the MOOSE framework
       2             : //* https://mooseframework.inl.gov
       3             : //*
       4             : //* All rights reserved, see COPYRIGHT for full restrictions
       5             : //* https://github.com/idaholab/moose/blob/master/COPYRIGHT
       6             : //*
       7             : //* Licensed under LGPL 2.1, please see LICENSE for details
       8             : //* https://www.gnu.org/licenses/lgpl-2.1.html
       9             : 
      10             : #include "SCMTriPinMeshGenerator.h"
      11             : #include "TriSubChannelMesh.h"
      12             : #include "libmesh/edge_edge2.h"
      13             : #include <numeric>
      14             : 
      15             : registerMooseObject("SubChannelApp", SCMTriPinMeshGenerator);
      16             : 
      17             : InputParameters
      18         170 : SCMTriPinMeshGenerator::validParams()
      19             : {
      20         170 :   InputParameters params = MeshGenerator::validParams();
      21         340 :   params.addRequiredParam<MeshGeneratorName>("input", "The corresponding subchannel mesh");
      22         170 :   params.addClassDescription("Creates a mesh of 1D fuel pins in a triangular lattice arrangement");
      23         340 :   params.addParam<Real>("unheated_length_entry", 0.0, "Unheated length at entry [m]");
      24         340 :   params.addRequiredParam<Real>("heated_length", "Heated length [m]");
      25         340 :   params.addParam<Real>("unheated_length_exit", 0.0, "Unheated length at exit [m]");
      26         340 :   params.addRequiredParam<Real>("pitch", "Pitch [m]");
      27         340 :   params.addRequiredParam<unsigned int>("nrings", "Number of fuel Pin rings per assembly [-]");
      28         340 :   params.addRequiredParam<unsigned int>("n_cells", "The number of cells in the axial direction");
      29         340 :   params.addParam<unsigned int>("block_id", 1, "Domain Index");
      30         170 :   return params;
      31           0 : }
      32             : 
      33          85 : SCMTriPinMeshGenerator::SCMTriPinMeshGenerator(const InputParameters & params)
      34             :   : MeshGenerator(params),
      35          85 :     _input(getMesh("input")),
      36         170 :     _unheated_length_entry(getParam<Real>("unheated_length_entry")),
      37         170 :     _heated_length(getParam<Real>("heated_length")),
      38         170 :     _unheated_length_exit(getParam<Real>("unheated_length_exit")),
      39         170 :     _pitch(getParam<Real>("pitch")),
      40         170 :     _n_rings(getParam<unsigned int>("nrings")),
      41         170 :     _n_cells(getParam<unsigned int>("n_cells")),
      42         255 :     _block_id(getParam<unsigned int>("block_id"))
      43             : {
      44          85 :   Real dz = (_unheated_length_entry + _heated_length + _unheated_length_exit) / _n_cells;
      45        2142 :   for (unsigned int i = 0; i < _n_cells + 1; i++)
      46        2057 :     _z_grid.push_back(dz * i);
      47          85 : }
      48             : 
      49             : std::unique_ptr<MeshBase>
      50          85 : SCMTriPinMeshGenerator::generate()
      51             : {
      52             : 
      53             :   // Setting up base elements in the mesh
      54          85 :   std::unique_ptr<MeshBase> mesh_base = std::move(_input);
      55          85 :   if (!mesh_base)
      56           0 :     mesh_base = buildMeshBaseObject();
      57             : 
      58          85 :   mesh_base->set_mesh_dimension(3);
      59             : 
      60             :   // Defining the Pin positions
      61          85 :   TriSubChannelMesh::pinPositions(_pin_position, _n_rings, _pitch, Point(0, 0));
      62             :   auto _nrods = _pin_position.size();
      63             : 
      64             :   // Reserving memory in the mesh
      65          85 :   mesh_base->reserve_elem(_n_cells * _nrods);
      66          85 :   mesh_base->reserve_nodes((_n_cells + 1) * _nrods);
      67          85 :   _pin_nodes.resize(_nrods);
      68             : 
      69             :   // Defining the extent of the subchanel mesh to append pins mesh
      70             :   // to the current subchannel mesh
      71             :   unsigned int chancount = 0;
      72         410 :   for (unsigned int j = 0; j < _n_rings - 1; j++)
      73         325 :     chancount += j * 6;
      74          85 :   unsigned int _n_channels = chancount + _nrods - 1 + (_n_rings - 1) * 6 + 6;
      75          85 :   unsigned int node_sub = (_n_cells + 1) * _n_channels;
      76          85 :   unsigned int elem_sub = _n_cells * _n_channels;
      77             : 
      78             :   // Add the points in the shape of a rectilinear grid.  The grid is regular
      79             :   // on the xy-plane with a spacing of `pitch` between points.  The grid along
      80             :   // z is also regular.  Store pointers in the _nodes
      81             :   // array so we can keep track of which points are in which pins.
      82             :   unsigned int node_id = node_sub;
      83        5558 :   for (unsigned int i = 0; i < _nrods; i++)
      84             :   {
      85        5473 :     _pin_nodes[i].reserve(_n_cells);
      86      143454 :     for (unsigned int iz = 0; iz < _n_cells + 1; iz++)
      87             :     {
      88      137981 :       _pin_nodes[i].push_back(mesh_base->add_point(
      89      275962 :           Point(_pin_position[i](0), _pin_position[i](1), _z_grid[iz]), node_id++));
      90             :     }
      91             :   }
      92             : 
      93             :   // Add the elements which in this case are 2-node edges that link each
      94             :   // pin nodes vertically.
      95             :   unsigned int elem_id = elem_sub;
      96        5558 :   for (unsigned int i = 0; i < _nrods; i++)
      97             :   {
      98      137981 :     for (unsigned int iz = 0; iz < _n_cells; iz++)
      99             :     {
     100      132508 :       Elem * elem = new Edge2;
     101      132508 :       elem->subdomain_id() = _block_id;
     102      132508 :       elem->set_id(elem_id++);
     103      132508 :       elem = mesh_base->add_elem(elem);
     104      132508 :       const int indx1 = (_n_cells + 1) * i + iz + node_sub;
     105      132508 :       const int indx2 = (_n_cells + 1) * i + (iz + 1) + node_sub;
     106      132508 :       elem->set_node(0, mesh_base->node_ptr(indx1));
     107      132508 :       elem->set_node(1, mesh_base->node_ptr(indx2));
     108             :     }
     109             :   }
     110          85 :   mesh_base->subdomain_name(_block_id) = name();
     111          85 :   mesh_base->prepare_for_use();
     112             : 
     113             :   // move the meta data into TriSubChannelMesh
     114          85 :   auto & sch_mesh = static_cast<TriSubChannelMesh &>(*_mesh);
     115          85 :   sch_mesh._pin_nodes = _pin_nodes;
     116          85 :   sch_mesh._pin_mesh_exist = true;
     117             : 
     118          85 :   return mesh_base;
     119           0 : }