Affiliation:
1. Computational Fluid Dynamics Laboratory, Institute of Continuous Media Mechanics UB RAS, 1 Koroleva Street, Perm 614068, Russia
Abstract
This article is devoted to the investigation of gaseous bubble dynamics in oscillating viscous liquids of different density values. The study is conducted numerically using the level-set method with a non-stationary approach. The bubble is initially located near the upper wall of the container. The effects of the inclusion and host liquid viscosities on interaction of the bubble with the wall are analysed. The calculations show that in the absence of gravity, for low-viscosity fluids the bubble is attracted to the nearest wall, which is consistent with previous analytical and experimental results. With increasing viscosity, the vibrational attraction to the wall becomes weaker and is then replaced by repulsion, which can be explained by the decelerative effect of viscosity in the boundary layer near the rigid surface, where the average flow becomes less intensive. The dependencies of the repulsion force on the parameter values are obtained by using the balance method (investigation of the gravity level needed to attain the quasi-equilibrium state at a certain distance between the bubble and the wall). The calculations show that the repulsion force grows with decreasing Reynolds number (increase of the viscosity).
This article is part of the theme issue ‘New trends in pattern formation and nonlinear dynamics of extended systems’.
Funder
Russian Science Foundation
Subject
General Physics and Astronomy,General Engineering,General Mathematics
Reference28 articles.
1. Motion of body in vibrating fluid;Lugovtsov BA;USSR Rept. Eng. Equip.,1987
2. Lyubimov DV Lyubimova TP Cherepanov AA. 1987 On a motion of solid body in a vibrating fluid (in Russian). In Convective Flows Collection of Perm State University pp. 61–70. Perm Russia: Perm State Pedagogical Institute.
3. Lyubimov D Cherepanov A Lyubimova T. 1992 The motion of solid body in a liquid under the influence of a vibrational field. In Rev. Proc. 1st Int. Symp. on Hydromechanics and Heat/Mass Transfer in Microgravity Perm-Moscow Russia 6–14 July 1991 pp. 247–251. Philadelphia PA: Gordon & Breach Science Publishers.
4. Vibration influence on the dynamics of a two-phase system in weightlessness conditions
5. Paradoxes in mechanics caused by vibrations
Cited by
5 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献