Deposition of polydisperse gas suspensions with nonlinear resonance oscillations in a closed tube.

Abstract

The characteristics of the deposition of a polydisperse gas suspension (tobacco smoke) in a closed tube in the mode of transition to shock waves at the first natural frequency are studied experimentally. The natural deposition of tobacco smoke continues for a long time. When the oscillations are excited, the process occurs hundreds of times faster. The shortest time for the deposition of tobacco smoke takes place when the tube is half filled. When filling the tube by a quarter and three quarters, the time of the process is almost the same, despite the three-fold difference in the content of smoke in the tube. Thus, the dependence of the tobacco smoke deposition time on the tube filling height is not monotone, which is associated with the formation of a secondary flow in the form of two toroidal vortices in the upper and lower halves of the closed tube.