LES inlet length scale -- CFD Online Discussion Forums

January 31, 2005, 13:26	LES inlet length scale	#1
f.neilson Guest Posts: n/a	Hello, I am studying the LES of a turbulent jet. I would like to be able to estimate the length scale of the turbulence at the inlet. I can obvioiusly estimate the kolmogorov scale and also the integral scale (L), but i would expect the scale at the inlet to be somewhere between these. All i know from experimental data is the axial mean and RMS velocity profiles (about 5% intensity), and the diameter of the jet inlet (d). How can i estimate a good length scale (and time scale for that matter) for this case at the inlet? Thankyou for your help.

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