Changes between Version 27 and Version 28 of u/erica/AccretionModelingBlog


Ignore:
Timestamp:
03/25/18 15:11:42 (7 years ago)
Author:
Erica Kaminski
Comment:

Legend:

Unmodified
Added
Removed
Modified
  • u/erica/AccretionModelingBlog

    v27 v28  
    3434=== 3/18/18, $\gamma=7/5$, dynamical cases ===
    3535
     36==== Resolving sonic point ====
     37
     38Am running the $\gamma=7/5$ case because the sonic point in this case is located far beyond the accretion radius ($R_s=6>>R_{acc}=.625$). This will enable us to see the generation of accretion shocks in the sim and check the behavior of the accretion algorithm under conditions of supersonic infall. We expect that the accretion algorithm should be fairly 'well-behaved' in the supersonic regime, as any pressure errors generated in the accretion kernel will be unable to propagate upstream and effect the hydrodynamical solution beyond the accretion volume.
     39
     40For this run, I made the box bigger than the fiducial case above, but came the same effective resolution. The bigger box now contains the bondi radius ($R_{BH}=30.5$). The following table lists this sims params:
     41
    3642|| $\gamma$ || 1.4 ||
    3743|| $\lambda_{crit}$ || .625 ||
    3844|| $C_{\infty}$ ||  1.183 ||
    3945|| $R_{BH}$ || 30.5 ||
    40 || $R_{s}$ || .6101 ||
    41 || $\dot{M}_{BH}$ || 8646.9  ||
     46|| $R_{s}$ || 6.1 ||
     47|| $\dot{M}_{BH}$ || 8646.9  ||
     48|| $t_{sim}$ || 60 ||
     49|| $L_x=L_y=L_z$ || 80 ||
     50|| $mx=my=mz$ || 128 ||
     51|| $dx_{min}$ || .15625 ||
    4252
    43 ==== Resolving sonic point ====
    44 
     53The final time of the simulation is ~2 sound crossing times, using the sound speed of the gas at the edge of the domain ($C_{amb}=1.283$) and the distance between this edge and the sink particle ($r=40$).
    4554
    4655
    4756==== Not-resolving sonic point ====
     57
    4858
    4959=== 3/18/18, $\gamma=1.66$, steady-state case  ===