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             : #ifdef MOOSE_MFEM_ENABLED
      11             : 
      12             : #include "MFEMCGSolver.h"
      13             : #include "MFEMProblem.h"
      14             : 
      15             : registerMooseObject("MooseApp", MFEMCGSolver);
      16             : 
      17             : InputParameters
      18        2310 : MFEMCGSolver::validParams()
      19             : {
      20        2310 :   InputParameters params = Moose::MFEM::LORLinearSolverBase<mfem::CGSolver>::validParams();
      21        4620 :   params.addClassDescription("MFEM native solver for the iterative solution of MFEM equation "
      22             :                              "systems using the conjugate gradient method.");
      23        4620 :   params.set<bool>("use_initial_guess", /*quiet_mode=*/true) = true;
      24        9240 :   params.addParam<mfem::real_t>("l_tol", 1e-5, "Set the relative tolerance.");
      25        9240 :   params.addParam<mfem::real_t>("l_abs_tol", 1e-50, "Set the absolute tolerance.");
      26        9240 :   params.addParam<int>("l_max_its", 10000, "Set the maximum number of iterations.");
      27        9240 :   params.addParam<int>("print_level", 2, "Set the solver verbosity.");
      28        6930 :   params.addParam<MFEMSolverName>("preconditioner", "Optional choice of preconditioner to use.");
      29             : 
      30        2310 :   return params;
      31           0 : }
      32             : 
      33          89 : MFEMCGSolver::MFEMCGSolver(const InputParameters & parameters)
      34          89 :   : Moose::MFEM::LORLinearSolverBase<mfem::CGSolver>(parameters)
      35             : {
      36          89 :   ConstructSolver();
      37          89 : }
      38             : 
      39             : void
      40          89 : MFEMCGSolver::ConstructSolver()
      41             : {
      42          89 :   auto solver = std::make_unique<mfem::CGSolver>(getMFEMProblem().getComm());
      43          89 :   SetSolverParameters(*solver);
      44          89 :   SetPreconditioner(*solver);
      45          89 :   _solver = std::move(solver);
      46          89 : }
      47             : 
      48             : void
      49          91 : MFEMCGSolver::SetSolverParameters(mfem::CGSolver & solver)
      50             : {
      51         182 :   solver.iterative_mode = getParam<bool>("use_initial_guess");
      52         182 :   solver.SetRelTol(getParam<mfem::real_t>("l_tol"));
      53         182 :   solver.SetAbsTol(getParam<mfem::real_t>("l_abs_tol"));
      54         182 :   solver.SetMaxIter(getParam<int>("l_max_its"));
      55         182 :   solver.SetPrintLevel(getParam<int>("print_level"));
      56          91 : }
      57             : 
      58             : #endif