| Abstract: | The problem of the interaction of a pair of coaxial initially stationary thermals is investigated numerically on the basis of the Navier-Stokes equations for a compressible heat-conducting gas. It is established that upon transformation of the thermals into vortex rings,  slip-through of the latter, limited in time because of the diffusion of vorticity and the action of molecular viscosity, is realized.Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 4, pp. 169–171, July–August, 1991. |
