Colliding Flows

This problem involves colliding two ellipsoidal cylinders essentially head on where the separation between the left and right flows is an arbitrary interface defined by a normal and a series of sine waves.

Run Parameters

These runs were all performed on a cube of length 44 pc

Run	Density	Velocity	Temperature	Resolution	Angle	Run Time	Sink Particles
A	1	21	5014	64	10	10.7 Myr	0
B	1	2.1	5014	64	10	100.7 Myr	0
C	10	21	160.6	64	10	10.7 Myr	1
D	10	2.1	160.6	64	10	100.7 Myr	1
E	20	21	100	64	10	10.7 Myr	1
F	4	21	471.9	64	10	10.7 Myr	0

Computational scales follow from a length scale of 1 pc, a Temperature scale of 1 K, and a Density scale of 1 part/cc

TIMESCALE	339631473950335
LSCALE	3.085680300000000E+018
RSCALE	1.672621580000000E-024
VELSCALE	9085.37793659026
PSCALE	1.380650300000000E-016
NSCALE	1.00000000000000
BSCALE	3.314644173409178E-009
TEMPSCALE	1.00000000000000
SCALEGRAV	1.287482066849589E-002

Results

A	B	C	D
movie​	movie​	movie​	movie​
movie​	movie​	movie​	movie​

A	F	C	E
movie​	movie​	movie​	movie​
movie​	movie​	movie​	movie​

Discussion

All of these runs had poorly resolved cooling lengths (fractions of a cell). The fastest growing modes were therefore at the nyquist frequency. This is however much larger than the cooling length of the shocked layer. I suspect that at higher resolutions the size of the condensations from the TI will much smaller and more prone to evaporation (or clump destruction) in the turbulent background flow…