FLASH3.3 Release API

ROBODoc 4.99 manual

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[Functions] source/Driver/Driver_init





  Driver_init(integer(in) :: myPE)


  Perform the Driver unit initializations.
  Gets runtime parameters from the flash.par, or from checkpoint file
  if run is a restart.
  Initializes the simulation time, initial dt, timestep, whether 
  from scratch or restart.
  Also, verifies that the initial dt passes CFL criteria.


  myPE - current processor


   These are the runtime parameters used by the basic Driver unit.
   Your specific implementation may have more runtime parameters.

   To see the default parameter values and all the runtime parameters
   specific to your simulation check the "setup_params" file in your
   object directory.
   You may have overwritten these values with the flash.par values
   for your specific run.  

    dt_init [REAL]
        Initial timestep DEV: inconsistent naming
    dtmax [REAL]
        Maximum timestep
    dtmin [REAL]
        Minimum timestep
    nbegin [INTEGER]
        First timestep
    nend [INTEGER]
        Maximum number of timesteps to take
    restart [BOOLEAN]
        Is this a restart run?
    tinitial [REAL]
        Initial simulation time
    tmax [REAL]
        Maximum simulation time
    wall_clock_time_limit [REAL]
        Total wall clock time limit (seconds)
    tstep_change_factor [REAL]
        factor to allow multiplicative increase in dt until it
        hits the CFL condition. This lets initial dt be
        very conservative initially, but increase rapidly to find the
        the optimum value.