Title: A simple model of dry convective helical vortices (with applications to the atmospheric dust devil)
Abstract: An asymptotic solution of inviscid Boussinesq equations for a 'dry convective Rankine vortex' with prescribed buoyant forcing is given. The obtained vortex solution demonstrates monotonic growth with height of the vortex core radius, which becomes infinite at a certain critical altitude, and the corresponding attenuation of the vertical vorticity. This idealized vortex is then embedded in a convectively unstable boundary layer; the resulting approximate vortex solution has been applied to determine the maximum rotational wind speed and diameter of dry convective dust-devil-like vortices.
Publication Year: 2005
Publication Date: 2005-07-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 24
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