Changes between Version 1 and Version 2 of ThermalInstability
- Timestamp:
- 06/30/11 14:37:55 (14 years ago)
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ThermalInstability
v1 v2 7 7 8 8 == Setup == 9 Box size is 4 pc and clump radius is 1 pc. Ambient and clump density are 2 part/cc and the clump has small density perturbations of order 10% but is initially in pressure equilibrium with ambient. 9 Box size is 4 pc and clump radius is 1 pc. Ambient and clump density are 2 part/cc and the clump has small density perturbations of order 10% but is initially in pressure equilibrium with ambient. I modified the clump module to do perturbations in r, theta, phi space instead of x-y-z space however I still used exp [ (k_r, k_theta, k_phi) dot (r, theta, phi) ] instead of the more appropriate spherical harmonics... 10 10 11 || A || [[latex($k_r$)]] || [[latex($k_{\theta}$)]] || [[latex($k_{\phi}$)]] || [[latex($\epsilon$)]] || 12 || .1 || [[latex($ \pi/2 $)]] || 0 || 0 || 0 || 13 || .05 || [[latex($ 2\pi $)]] || 4 || 2 || 0 || 14 || .05 || [[latex($ \pi $)]] || 3 || 4 || 0 || 15 16 [[latex($\frac{\rho}{\rho_0} = \displaystyle{\sum_i {A_icos(k^i_r r+k^i_{\theta}\theta+k^i_{\phi}\phi+\epsilon^i)}}$)]] 11 17 12 18 == Results == 13 19 || [attachment:ThermalInstabilityTiled.gif movie] || 14 20 || [[Image(ThermalInstabilityTiled.png, width=400)]] || 21 22 == Discussion == 23 While the small scale perturbations grow the fastest, eventually the large scale perturbation results in the clump collapsing. Towards the end of the run material is also 'collapsing' against the boundary creating a hot rarefied spherical shell.
