Meeting update - 6/17/13

  • Alfalfa needs a new video card pretty bad. Rich says he can order one, but needs the account number.
  • Worked on revisions for main body of paper. The updated pdf can be found here — ​http://www.pas.rochester.edu/~erica/BEsphere.pdf I ran into some trouble describing the last intermediate run (the lightest ambient medium). At first we talked about the sphere slowly acquiring more mass than the critical level and going over the edge. Then we talked about the ambient equilibrating to a decaying exponential, and that resulting surface pressure exceeds threshold Pext. After looking at the mass of the sphere over time, I would say that this later point is the case. Not only is the sphere initialized with subcritical mass, but it never again reaches its initial value. This is slightly concerning to me, given collapse ensues.

Here is an image of the calculated values from visit-

I got these values of mass from the sphere by doing the following - 1) looking at the lineouts of density and determining the position of the discontinuity (xdisc), which we are calling the radius of the sphere, 2) calculating the total mass within the sphere of r=xdisc with a query function in visit.

I noticed that the only sphere that is actually initialized to be at the analytical critical mass is the Matched case. The others have decreasing Minit with decreasing ambient densities. This seems to be related to smoothing of the BE-ambient boundary.

  • We talked about going on to chapters 15-16 of Toro. Chapter 15 talks about source term implementation, and chap 16 goes through multidimensional schemes. Should I next be focusing on source terms and self-gravity, and then follow it up with multidimensional schemes? Or the other way around??

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