ExodusTimeSequenceStepper

This time stepper derives from TimeSequenceStepperBase and provides the sequence of time values from an Exodus file.

The Exodus file is read by the first process (rank 0), and the time step sequence is then broadcast to all other processes.

See Failed solves for information on the behavior of this time stepper for failed time steps.

Example input file

In this example, the time stepper extracts the time sequence from an exodus output file. This exodus file may not necessarily have been generated using the same input file. The starting and end time of the simulation may still be set independently.

[Executioner]
  type = Transient
  end_time = 4.0
  [./TimeStepper]
    type = ExodusTimeSequenceStepper
    mesh = timesequence_no_start_time.e
  [../]
[]
(test/tests/time_steppers/timesequence_stepper/exodustimesequence.i)

Input Parameters

  • meshThe name of the mesh file to extract the time sequence from (must be an exodusII file).

    C++ Type:MeshFileName

    Controllable:No

    Description:The name of the mesh file to extract the time sequence from (must be an exodusII file).

Required Parameters

  • cutback_factor_at_failure0.5Factor to apply to timestep if a time step fails to converge.

    Default:0.5

    C++ Type:double

    Controllable:No

    Description:Factor to apply to timestep if a time step fails to converge.

  • reset_dtFalseUse when restarting a calculation to force a change in dt.

    Default:False

    C++ Type:bool

    Controllable:No

    Description:Use when restarting a calculation to force a change in dt.

  • use_last_dt_after_last_tFalseIf true, uses the final time step size for times after the last time in the sequence, instead of taking a single step directly to the simulation end time

    Default:False

    C++ Type:bool

    Controllable:No

    Description:If true, uses the final time step size for times after the last time in the sequence, instead of taking a single step directly to the simulation end time

Optional Parameters

  • control_tagsAdds user-defined labels for accessing object parameters via control logic.

    C++ Type:std::vector<std::string>

    Controllable:No

    Description:Adds user-defined labels for accessing object parameters via control logic.

  • enableTruewhether or not to enable the time stepper

    Default:True

    C++ Type:bool

    Controllable:Yes

    Description:whether or not to enable the time stepper

Advanced Parameters

Input Files