10 Dec
2025
10 Dec
'25
9:12 a.m.
Hello,
Is there a clean way to change the timestep size in a Carpet simulation on recovery (eg. effectively making Time::dtfac steerable)? I am running into numerical instabilities late in a simulation and was wondering if reducing the dtfac would help. While I am using multiple refinement levels with subcycling, I can ensure all levels are aligned in time at this checkpoint if it helps.
Thanks, Allen Wen