[scoop_them_mids]

Hello, a generic question more about physics than CFD software.

I used to simulate an axial gas flow, with typically v = 3m/s and L = 1m. Averaging was done over 8 seconds of simulated time. So, it took 24 passages of a fluid particle through the axis to get a reliable average.

Now I have a shear layer axis with, say, v = 10m/s, L = 20m. To travel that distance 20 times at that speed takes 40 seconds. So far I ran the case for 20 seconds max, which didn't give great results, so the idea above seems to make sense, but it could be completely coincidental.

Any suggestions?