The ground turbulent boundary layer of a stationary tornado-like vortex1


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    This work is supported by the National Science Foundation under Grant GP 757.


Recently, experimental data became available on the ground turbulent boundary layer of a model tornado vortex. A comparison with early theories of Weber, Anderson, Rott and Lewellen is made and it is found that the root-mean-square error seems great and justifies development of an improved theory with newly specified velocity profiles which are close to the experimental data. The dependence of the boundary layer development on the Reynolds number is explicitly shown. The present theory also extends to the useful Reynolds number range of the natural tornado.