Settings for central black hole and timestep

[Shigaharuki3012]

Are there any options where we can directly set the spin of the BH in the command line? And can we manually modify the timestep when it becomes very small?(In the tde simulation case,the dt is getting smaller from ~10^-3 to ~10^-5,which makes the simulation slow) The parameters for tde case are from "Disc formation from tidal disruption of stars on eccentric orbits by Kerr black holes using GRSPH"(arXiv:1910.10154),where we set beta=5,e=0.95,theta=60,a=0.99,r0=780rsun(initial position of the star for beta=5).You can see Figure 2 in the article.

[Shigaharuki3012]

I've known how to deal with it.