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 "TimeDomainEquationSystemProblemOperator.h"
      13             : 
      14             : namespace Moose::MFEM
      15             : {
      16             : void
      17         113 : TimeDomainEquationSystemProblemOperator::SetGridFunctions()
      18             : {
      19         113 :   _test_var_names = GetEquationSystem()->TestVarNames();
      20         113 :   _trial_var_names = GetEquationSystem()->TrialVarNames();
      21             : 
      22         113 :   TimeDomainProblemOperator::SetGridFunctions();
      23         113 : }
      24             : 
      25             : void
      26         113 : TimeDomainEquationSystemProblemOperator::Init(mfem::BlockVector & X)
      27             : {
      28         113 :   TimeDomainProblemOperator::Init(X);
      29         113 :   GetEquationSystem()->BuildEquationSystem();
      30             :   // Set timestepper
      31         113 :   auto & ode_solver = _problem_data.ode_solver;
      32         113 :   ode_solver = std::make_unique<mfem::BackwardEulerSolver>();
      33         113 :   ode_solver->Init(*(this));
      34         113 :   SetTime(_problem.time());
      35         113 : }
      36             : 
      37             : void
      38         641 : TimeDomainEquationSystemProblemOperator::Solve()
      39             : {
      40             :   // Advance time step of the MFEM problem. Time is also updated here, and
      41             :   // _problem_operator->SetTime is called inside the ode_solver->Step method to
      42             :   // update the time used by time dependent (function) coefficients.
      43         641 :   _problem_data.ode_solver->Step(_problem_data.f, _problem.time(), _problem.dt());
      44             :   // Synchonise time dependent GridFunctions with updated DoF data.
      45         641 :   SetTestVariablesFromTrueVectors();
      46         641 : }
      47             : 
      48             : void
      49         641 : TimeDomainEquationSystemProblemOperator::ImplicitSolve(const double dt,
      50             :                                                        const mfem::Vector & /*X*/,
      51             :                                                        mfem::Vector & dX_dt)
      52             : {
      53         641 :   dX_dt = 0.0;
      54         641 :   SetTestVariablesFromTrueVectors();
      55        1282 :   for (unsigned int ind = 0; ind < _trial_variables.size(); ++ind)
      56             :   {
      57        1282 :     _trial_variables.at(ind)->MakeTRef(
      58         641 :         _trial_variables.at(ind)->ParFESpace(), dX_dt, _block_true_offsets[ind]);
      59             :   }
      60         641 :   _problem_data.coefficients.setTime(GetTime());
      61         641 :   BuildEquationSystemOperator(dt);
      62             : 
      63         641 :   if (_problem_data.jacobian_solver->isLOR() && _equation_system->_test_var_names.size() > 1)
      64           0 :     mooseError("LOR solve is only supported for single-variable systems");
      65             : 
      66         641 :   _problem_data.jacobian_solver->updateSolver(
      67         641 :       *_equation_system->_blfs.Get(_equation_system->_test_var_names.at(0)),
      68         641 :       _equation_system->_ess_tdof_lists.at(0));
      69             : 
      70         641 :   _problem_data.nonlinear_solver->SetSolver(_problem_data.jacobian_solver->getSolver());
      71         641 :   _problem_data.nonlinear_solver->SetOperator(*GetEquationSystem());
      72         641 :   _problem_data.nonlinear_solver->Mult(_true_rhs, dX_dt);
      73         641 :   SetTrialVariablesFromTrueVectors();
      74         641 : }
      75             : 
      76             : void
      77         641 : TimeDomainEquationSystemProblemOperator::BuildEquationSystemOperator(double dt)
      78             : {
      79         641 :   GetEquationSystem()->SetTimeStep(dt);
      80         641 :   GetEquationSystem()->UpdateEquationSystem();
      81         641 :   GetEquationSystem()->BuildJacobian(_true_x, _true_rhs);
      82         641 : }
      83             : 
      84             : } // namespace Moose::MFEM
      85             : 
      86             : #endif