[Users] Changing cctk_delta_time

[Roland Haas]

Hello David,

I have never done this myself. As far as I understand, based on
previous discussions on Carpet, you can modify cctk_delta_time the same
way you are able to do in PUGH but only for unigrid (no mesh refinement)
simulations.

Since Carpet does not allow the timestep to be changed for mesh refined
simulations (which is the majority by now) you will have to set:

Carpet::adaptive_stepsize = "yes"

to avoid it aborting (even for unigrid simulations) when you change the
timestep.

Yours,
Roland

> Hello,
> 
> How does one change cacti_delta_time for the course grid in Carpet?  It seems fairly straight forward in PUGH but much more complicated in Carpet?
> 
> -DG

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