[FLASH-USERS] parameters changes allowed on restart?

[John ZuHone]

Andrew,

Restarting with parameters changed should work... however, if you want to change the minimum timestep you need to change "dtmin" instead of dtmax. dtmax will put a ceiling on your timesteps, forcing them to be *less* than a certain value but dtmin will force them larger than a certain value.

Best,

John Z

On Nov 24, 2009, at 3:42 PM, Andrew Szymkowiak wrote:

>   I want to run my simulation with a fine time-step for a while, and then take much larger steps later.  Instead of kludging something into the dt calculation of the driver, I thought that I'd be clever and restart from the chkpnt files to accomplish this.  So I did an initial run with dtmax set to a small number.  Then I started the next run, with dtmax now set to a much larger number.  In the log file, the value of the new dtmax is correctly shown.  But the simulation continues taking the old, small timesteps.  Perhaps it is not legal to change parameters on a restart, but I thought it might work...any suggestions?
> Thanks,   Andy S.