Turbulence integral lengthscale and mixing-length

September 7, 2001, 07:55

Dear all,

Any one has idea of the differences between turbulence integral lengthscale and mixing-length scale?

Thanks!

Ray

September 12, 2001, 20:51

Hi,

I'm afraid I lost the sole reference I could read as a successfull comparison between the two, although the integral length scale was a custom one (out of the top of my head.)

Briefly: mixing-length is calculated from RA flow velocity gradient, and distance to the wall (1D), while the integral length scale is calculated from fluctuating properties (but you might know it already.)

September 7, 2001, 07:55	Turbulence integral lengthscale and mixing-length	#1
Ray Guest Posts: n/a	Dear all, Any one has idea of the differences between turbulence integral lengthscale and mixing-length scale? Thanks! Ray

September 12, 2001, 20:51	Re: Turbulence integral lengthscale and mixing-len	#2
Christophe Guest Posts: n/a	Hi, I'm afraid I lost the sole reference I could read as a successfull comparison between the two, although the integral length scale was a custom one (out of the top of my head.) Briefly: mixing-length is calculated from RA flow velocity gradient, and distance to the wall (1D), while the integral length scale is calculated from fluctuating properties (but you might know it already.)