Motion of a Large Dusty Buoyant Thermal With a Vortex Ring

[+] Author and Article Information
Stephen S.-H. Chang

Lockheed Missiles and Space Co., Inc., Sunnyvale, Calif. 94088

J. Appl. Mech 45(4), 711-716 (Dec 01, 1978) (6 pages) doi:10.1115/1.3424407 History: Received March 01, 1977; Revised March 01, 1978; Online July 12, 2010


This paper presents a method for computing the motion and decay of a large dusty, buoyant thermal (cloud) carried by a vortex ring generated from a strong near ground explosion and ascending in an inhomogeneous atmosphere. A system of equations is derived describing the motion of the vortex ring, the thermal, and the pollutants which consist of numerous solid spherical particles. The interior properties and the trajectories of the thermal and the pollutants are obtained. The numerical solution for the thermal trajectory is in excellent agreement with experiment.

Copyright © 1978 by ASME
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