Driver_computeDt(integer(IN) :: nbegin, integer(IN) :: nstep, real(IN) :: simTime, real(IN) :: dtOld, real(OUT) :: dtNew)
Determine the stability-limited time step. This timestep is determined using information from the included physics modules - many different timestep limiters are polled. The global driver might use a different (hopefully smaller) time step, to match a file write time (tplot or trstr) or if the simulation end time has been reached; such possibilities are not considered here.
nbegin - first step of the simulation (this is only used to determine if a label header should be written to the screen) nstep - current step of the simulation simTime - current simulation time of the run dtOld - the dt from the timestep that we just finished (it's old because we be using dtOld to calculate and return the dt for the next timestep (dtNew) dtNew - returned value of the dt calculated for the next timestep