Hall-MHD reconnection

GEM setup with electron skin depth = 0.06                                   
calculated with AMRClassic


(click image to see movie)



Collisionless reconnection

Hall-MHD Studies


+ energy equation, adiabatic/isothermal

div B problem: divergence-cleaning method (Dedner et al., 2002)

2-dim Reconnection: Harris sheet with sheet width of ion-inertia length
base resolution 512x512 refined up to 4096x4096

domain size x = -50 .. 50, y = -10 .. 10

current density (out of plane) at t=53:



The "big" picture




X-line zoom




Block coverage of separatrix




Second reconnection site off main X-line




Current density scales down to 1 grid cell, indication for singular behavior



(x = -0.6 .. 0.6, y = -0.12 .. 0.12)

Electron inertia




Regularization on electron inertia length scale (x = -1.9 .. 1.8, y = -0.4 .. 0.4)