[petsc-users] Control adaptive time step

[Tang, Qi]

Hi,
Is there a simple way to control the first few adaptive time step? Currently, I am using the following options but dt grows too fast initially. The first few time steps increase dt by a factor of 10 in each time step. Is there a way to do a slow start, say, a factor of 2 instead of 10? Thanks.

 -ts_type arkimex
 -ts_arkimex_type 2e
 -ts_arkimex_fully_implicit 
 -ts_adapt_dt_min 1.0e-5 
 -ts_adapt_dt_max 1.0e-2 
 -ts_adapt_type basic

Qi
T-5 at LANL