Changes between Version 34 and Version 35 of u/u/erica/BEboundary

Timestamp:

05/28/13 12:30:23 (11 years ago)

Author:

Erica Kaminski

Comment:

—

u/u/erica/BEboundary

@@ -32 +32 @@
 [[Image(BoundaryRhow3.gif, 35%)]] [[Image(BoundaryVradw3.gif, 35%)]]
 
-This case is closest to the Matched case. Here we see the effects of the Poisson boundary conditions in a similar way that we did above in the Matched case but not as exaggerated. That is, the velocity increases near the spherical boundary, but not as drastically. Near the end of the simulation, when the speeds have approached vrad/cs~4 nearer the BE sphere boundary, do we very quickly see a build up of density in the corresponding region. I wonder if this time corresponds to the time we see a 'turn-over' in the solution from compression wave to classic collapse? The free-fall time of ambient in this case is tff = 7 Myr, or t=0.44>tsim=0.28.
+This case is closest to the Matched case. Here we see the effects of the Poisson boundary conditions in a similar way that we did above in the Matched case but not as exaggerated. That is, the velocity increases near the spherical boundary, but not as drastically. Near the end of the simulation, when the speeds have approached vrad/cs~4, we very quickly see a build up of density in the corresponding ambient region. I wonder if this time corresponds to the time we see a 'turn-over' in the solution from compression wave to classic collapse? The free-fall time of ambient in this case is tff = 7 Myr, or t=0.44>tsim=0.28.
 
 = Ambient 1/10 = 
@@ -38 +38 @@
 [[Image(BoundaryRhow10.gif, 35%)]] [[Image(BoundaryVradw10.gif, 35%)]]
 
-Here the ambient remains quiescent most of the way through the simulation, as the BE sphere begins to collapse. We see only very late in the sim, after the collapse is well underway, a transonic flow begin to develop along the spherical boundary. This flow doesn't quite reach  the BE sphere surface by the end of the simulation. The free-fall time of the ambient in this case is tff = 14 Myr, or in computational units, tff=0.7869 > tsim = 0.4. 
+Here the ambient remains quiescent most of the way through the simulation, as the BE sphere begins to collapse. We see only very late in the sim, after the collapse is well underway, a transonic flow begin to develop in the ambient medium, closer in to the sphere than the other cases. This is interesting, both the diminished strength of the flow speed and the closer proximity of the flow to the sphere, i.e. further away from the spherical boundary than in previous cases. This flow doesn't quite reach  the BE sphere surface by the end of the simulation. The free-fall time of the ambient in this case is tff = 14 Myr, or in computational units, tff=0.7869 > tsim = 0.4. 
 
 = Ambient 1/30 =