Changes between Version 57 and Version 58 of u/BonnorEbertMatched

Timestamp:

06/26/12 11:26:34 (12 years ago)

Author:

Erica Kaminski

Comment:

—

u/BonnorEbertMatched

@@ -38 +38 @@
 The same wave of inward moving material is seen in each of these plots, except that the sphere in the lighter medium is more resilient to allowing the wave to pass through the boundary, whereas in the matched case there seems to be no boundary and the wave passes freely through Rbe. Thus it seems that in the light ambient case, while there is inward moving material, there is little momentum being imparted to the sphere's boundary and so, the velocity of the material inside doesn't acquire the general shape of the velocity curve outside of the sphere. The inward moving material in the matched case must have a greater momentum, allowing the flow of energy to enter into the sphere resulting in a continuous wave across the boundary.
 
-Here is a movie of the radial velocity vs. radius of the BE sphere under matched conditions:
-
-:[[Image(vradLineOutMatched1.gif, 37%)]]
-
 
 ==== Density-'''''
@@ -53 +49 @@
 By t=tc~2.3 myr, my [https://clover.pas.rochester.edu/trac/astrobear/attachment/wiki/u/BonnorEbertMatched/ApproxSphereWriteUp.pdf calculations] predicted a density to be of order rho~2.3x10^-21^g/cm^3^. While this is off by ~ 2, it also should be noted that my calculation was considering a shell of mass piling up at the initial Rbe. Since by 2.3 myrs, material has passed within the initial Rbe, my calculation would presumably be larger than observed here.
 
-Here is a movie of the density lineout of the BE sphere under matched conditions:
-
-:[[Image(rhoLineOutMatched1.gif, 36%)]]
 
 
@@ -84 +77 @@
 -It may be interesting to compare these plots to those of a similar collapse study in which the critical BE sphere in a light medium (same density and homogeneity as in the light ambient of this study) was triggered to collapse with a density enhancement above equilibrium values [https://clover.pas.rochester.edu/trac/astrobear/wiki/u/CompareOldandNew (click here)]. The sphere parameters are the same, except that in the B&P setup, collapse was induced by a 10% over density of the grid. 
 
+
+-To better understand the last time in the density plots, where the density Left of the density shock drops below earlier values, here are movies of the radial velocity and density of the BE sphere under matched conditions:
+
+:[[Image(vradLineOutMatched1.gif, 37%)]]
+
+
+:[[Image(rhoLineOutMatched1.gif, 36%)]]
+
+
 -The ram pressure does not seem to be as dominant a factor in inducing collapse, rather the thermal pressure almost immediately exceeds Pcrit.. Thus it may be better to approximate tc as much earlier on.