Wake-vortex Eddy-dissipation model predictions compared with observations

The purpose of this paper is to describe the latest version of a wake-vorte x eddy-dissipation model devised by T. Sarpkaya ("New Model for Vortex Deca y in the Atmosphere," Journal of Aircraft, Vol. 37, No. 1, 2000, pp. 53-61. ) and to compare its predictions with lidar observations obtained at Memphi s and Dallas/Fort Worth airports. The model simulates the evolution of airc raft-generated trailing vortices in an atmospheric environment defined by v ertical profiles of potential temperature, eddy-dissipation rate, and cross wind. Visual and quantitative comparisons of the time histories of altitude , circulation, and lateral position of predicted and measured vortices are presented.