A simple model of dry convective helical vortices (with applications to the atmospheric dust devil)

Details A simple model of dry convective helical vortices (with applications to the atmospheric dust devil) A simple model of dry convective helical vortices (with applications to the atmospheric dust devil)

Jul 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005dyato..40..151k&link_type=abstract

Dynamics of Atmospheres and Oceans, Volume 40, Issue 3, p. 151-162.

Physics

4

Scientific paper

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.

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