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 "MFEMTransient.h"
      13             : #include "MFEMProblem.h"
      14             : #include "TimeDependentEquationSystemProblemOperator.h"
      15             : #include "TimeStepper.h"
      16             : 
      17             : registerMooseObject("MooseApp", MFEMTransient);
      18             : 
      19             : InputParameters
      20        2740 : MFEMTransient::validParams()
      21             : {
      22        2740 :   InputParameters params = MFEMProblemSolve::validParams();
      23        2740 :   params += TransientBase::validParams();
      24        2740 :   params.addClassDescription("Executioner for transient MFEM problems.");
      25        2740 :   return params;
      26           0 : }
      27             : 
      28         321 : MFEMTransient::MFEMTransient(const InputParameters & params)
      29             :   : TransientBase(params),
      30         321 :     _mfem_problem(dynamic_cast<MFEMProblem &>(feProblem())),
      31         321 :     _mfem_problem_data(_mfem_problem.getProblemData()),
      32         642 :     _mfem_problem_solve(*this, getProblemOperators())
      33             : {
      34             :   // If no ProblemOperators have been added by the user, add a default
      35         321 :   if (getProblemOperators().empty())
      36             :   {
      37         321 :     _mfem_problem_data.eqn_system = std::make_shared<Moose::MFEM::TimeDependentEquationSystem>(
      38         321 :         _mfem_problem_data.time_derivative_map);
      39             :     auto problem_operator =
      40         321 :         std::make_shared<Moose::MFEM::TimeDependentEquationSystemProblemOperator>(_mfem_problem);
      41         321 :     addProblemOperator(std::move(problem_operator));
      42         321 :   }
      43         321 : }
      44             : 
      45             : void
      46         321 : MFEMTransient::init()
      47             : {
      48         321 :   TransientBase::init();
      49             : 
      50         321 :   if (_mfem_problem_data.nonlinear_solver)
      51          24 :     _mfem_problem_data.eqn_system->SetSolverRequiresGradient(
      52          24 :         _mfem_problem_data.nonlinear_solver->RequiresGradient());
      53             : 
      54             :   // Set up initial conditions
      55         321 :   _mfem_problem_data.eqn_system->Init(
      56         321 :       _mfem_problem_data.gridfunctions,
      57         321 :       _mfem_problem_data.cmplx_gridfunctions,
      58         963 :       getParam<MooseEnum>("assembly_level").getEnum<mfem::AssemblyLevel>());
      59             : 
      60         642 :   for (const auto & problem_operator : getProblemOperators())
      61             :   {
      62         321 :     problem_operator->SetGridFunctions();
      63         321 :     problem_operator->Init(_mfem_problem_data.f);
      64             :   }
      65         321 : }
      66             : 
      67             : void
      68        1572 : MFEMTransient::takeStep(Real input_dt)
      69             : {
      70        1572 :   _dt_old = _dt;
      71             : 
      72        1572 :   if (input_dt == -1.0)
      73        1294 :     _dt = computeConstrainedDT();
      74             :   else
      75         278 :     _dt = input_dt;
      76             : 
      77        1572 :   _time_stepper->preSolve();
      78             : 
      79             :   // Unfortunately, time needs to be temporarily incremented so we get
      80             :   // meaningful console output in timestepSetup(). We decrement it back
      81             :   // immediately after so step() below behaves as expected.
      82        1572 :   _time += _dt;
      83        1572 :   _problem.timestepSetup();
      84        1572 :   _time -= _dt;
      85             : 
      86        1572 :   _problem.onTimestepBegin();
      87        1572 :   _problem.execTransfers(EXEC_TIMESTEP_BEGIN);
      88        1572 :   if (!_problem.execMultiApps(EXEC_TIMESTEP_BEGIN, true))
      89             :   {
      90           0 :     _last_solve_converged = false;
      91           0 :     return;
      92             :   }
      93        1572 :   _problem.execute(EXEC_TIMESTEP_BEGIN);
      94             : 
      95             :   // Advance time step of the MFEM problem. Time is also updated here, and
      96             :   // _problem_operator->SetTime is called inside the ode_solver->Step method to
      97             :   // update the time used by time dependent (function) coefficients.
      98        1572 :   _time_stepper->step();
      99             : 
     100             :   // Continue with usual TransientBase::takeStep() finalisation
     101        1572 :   _last_solve_converged = _time_stepper->converged();
     102             : 
     103        1572 :   if (!lastSolveConverged())
     104             :   {
     105           0 :     _console << "Aborting as solve did not converge" << std::endl;
     106           0 :     return;
     107             :   }
     108             : 
     109        1572 :   _problem.execute(EXEC_TIMESTEP_END);
     110        1572 :   _problem.execTransfers(EXEC_TIMESTEP_END);
     111        1572 :   _problem.execMultiApps(EXEC_TIMESTEP_END, true);
     112             : 
     113        1572 :   if (lastSolveConverged())
     114        1572 :     _time_stepper->acceptStep();
     115             :   else
     116           0 :     _time_stepper->rejectStep();
     117             : 
     118             :   // Set time to time old, since final time is updated in TransientBase::endStep()
     119        1572 :   _time = _time_old;
     120             : 
     121        1572 :   _time_stepper->postSolve();
     122             : }
     123             : 
     124             : #endif