NUMERICAL EXPERIMENTS ON THE FORMATION OF A TORNADO FUNNEL IN THE BOUNDARY LAYER.
Technical note no. 1,
TECHNISCHE HOCHSCHULE DARMSTADT (WEST GERMANY) INSTITUT FUER METEOROLOGIE
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A tornado-like vortex, which intensifies with time, is imposed on the upper boundary of the boundary layer. The downward development of this axisymmetric vortex is studied by numerical integration of the flow equations. The contour of the visible tornado funnel has been computed for various times. The streamlines, the fields of pressure deviation, and of the tangential velocity are presented for a time close to the steady state. The influence of a varying eddy diffusion coefficient is investigated. Author