Meeting Update 12/15/2014 - Eddie

As a reminder, here are the parameters I used for my 3-D, 3-clump set up:

Ambient/Wind Clumps
density (1/cc) 1e3 5e5
velocity (km/s) 27.2644 0, 5, 10
temperature (K) 5e3 10

So the density contrast is 500, the clumps are initially in pressure equilibrium with the ambient, and the fastest clump leads to a Mach number of approximately 5. Total simulation time ~ 50 years.

  • Fixing the ionized sulfur species in the wind boundary condition solved the issues I was having with my emission maps. Here are some maps at different viewing angles:
  • I ran a 1-D radiative shock model with parameters from my 3-clump set up and found a cooling length of approximately 4.999e13 cm = 3.342 AU. As we have done in the past, this is defined as the distance for the gas to cool down to 1000 K. This means that my cooling length resolution for the most recent runs is 13.37 cells/Lcool.
    • This cooling length calculation is for the strongest possible shock (plane-parallel shock, velocity of fast-moving clump). Most of the shock structure on the grid will have cooling lengths longer than this due to oblique angles and slower moving or stationary clumps.
    • At this resolution, the run took almost 3 days (69.38 hrs) on 120 cores on bluehive. This equals approx 8326 SUs. You might recall from last week, that this same run took 77.3 hrs on 96 cores (7420 SUs), so slightly slower but less expensive which is expected.


  • I have updates on MaxSpeed tracking that I will share tomorrow, and then it will be time to focus my development efforts on the new Outflow object module.

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