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Meeting Update 03.19

Clumps

For uniform field clumps, the data are on I've discussed with Ruka on the 2D images and line plots we want to have in the paper. He now has the data and instructions to make the images.
Here's his trial animation:

http://www.pas.rochester.edu/~smurugan/SYMP.gif

Done some "single mode" magnetic clump runs. Here I define the "polarization" as the direction at which the poloidal field is pointing. We need to discuss two distinct polarizations: aligned with the shock and perpendicular to the shock. Since the poloidal and toroidal components can have different ratios inside the clump, we actually have one more free parameter. In the paper the shock is directed on X direction. So X polarization is the aligned case, Y or Z polarization is the perpendicular case.

Here I show the animation when the clump is polarized on Z direction, poloidal vs toroidal ratio is 1, volume averaged beta = 3.15:

http://www.pas.rochester.edu/~shuleli/SingleMode/zpol.gif

The poloidal vs toroidal field strength is shown in the following animation:

http://www.pas.rochester.edu/~shuleli/SingleMode/ztvp.gif

Next is the X polarized clump:

http://www.pas.rochester.edu/~shuleli/SingleMode/xpol.gif

Comparing the density evolution, the Z polarized clump is delayed:

The higher resolution runs are about to start with volume averaged magnetic field strength equivalent to beta = 0.5 and 8, corresponding to the uniform field case.

BE Dynamo Generation

Now the subcycled runs on 1 processor. Here I show the animation of viscous MHD KH instability under when the Braginskii viscosity cycles twice per hydro step:

astrobear

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Meeting Update 03.19

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