Changes between Version 12 and Version 13 of u/erica/MHDshocksReorientation

Timestamp:

03/09/16 16:16:38 (9 years ago)

Author:

Erica Kaminski

Comment:

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u/erica/MHDshocksReorientation

@@ -41 +41 @@
 
 
-For the outer wave front (fast shock), the apparent reorientation can be explained by a stalling of this wave front, as seen in the upper right/lower left corners of the collision interface. This is happening because there is a loss of magnetic pressure behind this wave front, and thus, the shock loses its support and stalls (see following figure of magnetic pressure map). The enhanced magnetic pressure, relatively speaking, in the opposite regions are due to the combined effect of 1. the deflection of material and 2. the enhanced pressure from radial expansion. In regions where the magnetic pressure is strongest, the wave front is supported and continues to move outward, thus appearing to straighten the outer wave front.   
+For the outer wave front (fast shock), the apparent reorientation can be explained by a stalling of this wave front, as seen in the upper right/lower left corners of the collision interface. This is happening because there is a loss of magnetic pressure behind this wave front, and thus, the shock loses its support and stalls (see following figure of magnetic pressure map). 
+
+[[Image(magPress.png, 35%)]]
+
+The enhanced magnetic pressure, relatively speaking, in the opposite regions are due to the combined effect of 1. the deflection of material and 2. the enhanced pressure from radial expansion. In regions where the magnetic pressure is strongest, the wave front is supported and continues to move outward, thus appearing to straighten the outer wave front.   
 
 In the hydro case, we do not see this reorientation (at least in 2D). Instead, we find a staircase effect. This seems to be getting generated by vortices above and below the collision region. Material that is deflected away from the flows by the shear, falls back down onto the cylinder due to pressure gradients. This additional material then creates more x-momentum/ram pressure, which drives the stair-casing structure.