Turbulence anisotropy in an urban canyon and intersections

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Monday, 18 January 2010
Cheryl L. Klipp, U.S. Army Research Laboratory, Adelphi, MD

Handout (251.6 kB)

Turbulence near a solid surface is not isotropic. As a consequence, dispersion is greater in some directions than in others at any location in an urban boundary layer. A better characterization of the anisotropy should lead to better modeling of turbulent dispersion.

Using data from JU2003, the degree of anisotropy as well as the largest and smallest dispersion directions will be shown for various locations in the Park Avenue canyon as well as at the intersections at either end of the canyon. Values for an open area will also be shown for comparison.