Changes between Version 32 and Version 33 of AstroBearProjects/resistiveMHD

Timestamp:

01/07/14 19:40:45 (11 years ago)

Author:

Shule Li

Comment:

—

AstroBearProjects/resistiveMHD

@@ -29 +29 @@
 centered on the cell faces. Its curl therefore reside on the cell edges. Here is an example on calculating the diffusive current on the x direction, notice [[BR]]
 that the red arrow is where we are calculating the diffusive current, the green arrows are where the magnetic field originally resides: [[BR]]
-[[Image(resistive_diagram.png, 10%)]] [[BR]]
-[[Image(http://www.pas.rochester.edu/~shuleli/res_dia1.png, 10%)]] [[BR]]
+[[Image(resistive_diagram.png, 20%)]] [[BR]]
+[[Image(http://www.pas.rochester.edu/~shuleli/res_dia1.png, 20%)]] [[BR]]
 The actual code looks like the following in 2D (jy are initialized to 1): [[BR]]
 {{{
@@ -112 +112 @@
 where [[latex($\rho_0 = 1$)]] and [[latex($a = 0.5$)]]. The temperature is set to be constant as 0.5. [[BR]]
 The domain is set to be -6.4 < x < 6.4 and -12.8< y < 12.8, with fixed resolution 480 * 960. The boundaries are all open. The initial profile is plotted below: [[BR]]
-[[Image(http://www.pas.rochester.edu/~shuleli/hhc_plot.png, 10%)]][[BR]][[BR]]
+[[Image(http://www.pas.rochester.edu/~shuleli/hhc_plot.png, 20%)]][[BR]][[BR]]
 The initial state is in pressure equilibrium though unstable. There are two ways to generate instabilities. The first way is to artificially increase the resistivity [[BR]]
 at the center of the domain. This increase will result in a higher reconnectivity, which will eventually bend magnetic field. This creates an X point where field [[BR]]
@@ -118 +118 @@
 to the direction of the sheer pinch. The box surrounding the X point where the outflows (Petschek shock) come out of is called the "Sweet-Parker Box". The following [[BR]]
 diagrams show how increased resistivity at the center of a sheer pinch drives Petschek shock.[[BR]] 
-[[Image(http://www.pas.rochester.edu/~shuleli/multi_test/resistive_instab.png,10%)]] [[Image(http://www.pas.rochester.edu/~shuleli/hhc_flowpattern.png, 10%)]] [[BR]][[BR]] 
+[[Image(http://www.pas.rochester.edu/~shuleli/multi_test/resistive_instab.png,20%)]] [[Image(http://www.pas.rochester.edu/~shuleli/hhc_flowpattern.png, 20%)]] [[BR]][[BR]] 
 The Mach number in 2D case is plotted in pseudo-color: [[BR]]
-[[Image(http://www.pas.rochester.edu/~shuleli/hhc_mach.png, 10%)]][[BR]][[BR]]
+[[Image(http://www.pas.rochester.edu/~shuleli/hhc_mach.png, 20%)]][[BR]][[BR]]
 
-To test Sweet-Parker problem in AstroBEAR, we construct the sheer pinch using the above setup, and modify . [[BR]][[BR]]
+To test Sweet-Parker problem in AstroBEAR, we construct the sheer pinch using the above setup, and modify the resistivity at the center of the simulation box. [[BR]][[BR]]
 
 The following figure shows the Petschek shock from a reconnection spot at the center. Colored variable is the kinetic energy in log scale, magnetic field is illustrated [[BR]]
 by white lines. [[BR]]
-[[Image(http://www.pas.rochester.edu/~shuleli/multi_test/sp1_0020.png, 10%$)]]
+[[Image(http://www.pas.rochester.edu/~shuleli/multi_test/sp1_0020.png, 20%$)]]
 [[BR]]
 A movie with 2-level AMR:[[BR]]
@@ -139 +139 @@
 of pressure imbalance, which creates periodical dense "islands".The growth rate and the size of the "islands" depend on resistivity and the strength of the perturbation.[[BR]][[BR]]
 
-[[Image(http://www.pas.rochester.edu/~shuleli/multi_test/mihr_0180.png,10%)]][[BR]][[BR]]
+[[Image(http://www.pas.rochester.edu/~shuleli/multi_test/mihr_0180.png,20%)]][[BR]][[BR]]
 
 To watch a full movie, [http://www.pas.rochester.edu/~shuleli/multi_test/mihr.gif click here][[BR]][[BR]]
@@ -158 +158 @@
 
 where T is the electron temperature in eV, Zeff is the effective ion charge.The Coulomb logarithm for interested number density is plotted below: [[BR]]
-[[Image(http://www.pas.rochester.edu/~shuleli/CoulombLog.png, 10%)]][[BR]]
+[[Image(http://www.pas.rochester.edu/~shuleli/CoulombLog.png, 20%)]][[BR]]
 [[BR]][[BR]]