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        2646 : MFEMTransient::validParams()
      21             : {
      22        2646 :   InputParameters params = MFEMProblemSolve::validParams();
      23        2646 :   params += TransientBase::validParams();
      24        2646 :   params.addClassDescription("Executioner for transient MFEM problems.");
      25        2646 :   return params;
      26           0 : }
      27             : 
      28         274 : MFEMTransient::MFEMTransient(const InputParameters & params)
      29             :   : TransientBase(params),
      30         274 :     _mfem_problem(dynamic_cast<MFEMProblem &>(feProblem())),
      31         274 :     _mfem_problem_data(_mfem_problem.getProblemData()),
      32         548 :     _mfem_problem_solve(*this, getProblemOperators())
      33             : {
      34             :   // If no ProblemOperators have been added by the user, add a default
      35         274 :   if (getProblemOperators().empty())
      36             :   {
      37         274 :     _mfem_problem_data.eqn_system = std::make_shared<Moose::MFEM::TimeDependentEquationSystem>(
      38         274 :         _mfem_problem_data.time_derivative_map);
      39             :     auto problem_operator =
      40         274 :         std::make_shared<Moose::MFEM::TimeDependentEquationSystemProblemOperator>(_mfem_problem);
      41         274 :     addProblemOperator(std::move(problem_operator));
      42         274 :   }
      43         274 : }
      44             : 
      45             : void
      46         274 : MFEMTransient::init()
      47             : {
      48         274 :   TransientBase::init();
      49             : 
      50             :   // Set up initial conditions
      51         274 :   _mfem_problem_data.eqn_system->Init(
      52         274 :       _mfem_problem_data.gridfunctions,
      53         274 :       _mfem_problem_data.cmplx_gridfunctions,
      54         822 :       getParam<MooseEnum>("assembly_level").getEnum<mfem::AssemblyLevel>());
      55             : 
      56         548 :   for (const auto & problem_operator : getProblemOperators())
      57             :   {
      58         274 :     problem_operator->SetGridFunctions();
      59         274 :     problem_operator->Init(_mfem_problem_data.f);
      60             :   }
      61         274 : }
      62             : 
      63             : void
      64        1284 : MFEMTransient::takeStep(Real input_dt)
      65             : {
      66        1284 :   _dt_old = _dt;
      67             : 
      68        1284 :   if (input_dt == -1.0)
      69        1064 :     _dt = computeConstrainedDT();
      70             :   else
      71         220 :     _dt = input_dt;
      72             : 
      73        1284 :   _time_stepper->preSolve();
      74             : 
      75             :   // Unfortunately, time needs to be temporarily incremented so we get
      76             :   // meaningful console output in timestepSetup(). We decrement it back
      77             :   // immediately after so step() below behaves as expected.
      78        1284 :   _time += _dt;
      79        1284 :   _problem.timestepSetup();
      80        1284 :   _time -= _dt;
      81             : 
      82        1284 :   _problem.onTimestepBegin();
      83             : 
      84             :   // Advance time step of the MFEM problem. Time is also updated here, and
      85             :   // _problem_operator->SetTime is called inside the ode_solver->Step method to
      86             :   // update the time used by time dependent (function) coefficients.
      87        1284 :   _time_stepper->step();
      88             : 
      89             :   // Continue with usual TransientBase::takeStep() finalisation
      90        1284 :   _last_solve_converged = _time_stepper->converged();
      91             : 
      92        1284 :   if (!lastSolveConverged())
      93             :   {
      94           0 :     _console << "Aborting as solve did not converge" << std::endl;
      95           0 :     return;
      96             :   }
      97             : 
      98        1284 :   if (lastSolveConverged())
      99        1284 :     _time_stepper->acceptStep();
     100             :   else
     101           0 :     _time_stepper->rejectStep();
     102             : 
     103             :   // Set time to time old, since final time is updated in TransientBase::endStep()
     104        1284 :   _time = _time_old;
     105             : 
     106        1284 :   _time_stepper->postSolve();
     107             : }
     108             : 
     109             : #endif