Meeting Update 10/15/2012 - Eddie

Cooling Jets

My priority over the last week has been the cooling jet sims, and I am close to being done with all the runs that I had set out to do. Jonathan found a memory leak that was causing the strong cooling runs to fail. With this patched, I was able to run the 2D and 2.5D versions of the strong cooling case. The 3D version is still having some issues, but we might be able to get this one working too. All images and movies can be found at 3DCoolingJets. The volume renderings still need some work.


Cooling Diagnostics

I made cooling length and cooling time fields in fields.f90 in order to calculate the cooling strength chi (cooling length / jet radius). I had previously calculated chi by running several 1D radiative shock simulations which allowed me to come up with an analytic formula for cooling length in terms of shock velocity and ambient density (see ehansen06122012). With the new cooling diagnostics, I can see more quantitatively the effect of cooling near the jet head (see ehansen10122012). I also confirmed, at least for the weak cooling case, that my analytic method for chi is consistent with the cooling diagnostics method.


Comparing Radiative Shock Models

I have been working on comparing my data with Anna's data (Pat's student). The comparison of emission data did not look promising, so I took a step back and compared the hydrodynamic quantities density, temperature, and ionization fraction. I compared 3 different runs which vary only in shock velocity. They all have a preshock density of 100 cm-3 and a preshock ionization fraction of 0.01.

30 km/s​

50 km/s​

80 km/s​


Configuration Script

I worked on writing a configuration script for astrobear. I made one that works as a bash script, but it is somewhat limited. It worked on grass, and it allowed me to compile and run astrobear without having any modules loaded or a Makefile.inc. However, we probably do not want to use this since it is specific to how our library paths (HDF5, HYPRE, etc.) are named. The best configuration script would be an AutoConf script. I am reading up on this and even started writing one, but this will take some time because it is like learning another language. Depending on when we need this to be done, it might make more sense to pass this project to someone else?


Mach Stems

I did not get around to doing much for this project, but I did notice that Kris has a nice project page that I will be referencing. ClumpClump/MachStems

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