𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A simplified model of bubble-driven flow in an axisymmetric container

✍ Scribed by Kunda, W. ;Poots, G.

Publisher
Springer
Year
1987
Tongue
English
Weight
489 KB
Volume
44
Category
Article
ISSN
0003-6994

No coin nor oath required. For personal study only.

✦ Synopsis

A simplified mathematical model simulating a gas bubble agitation system is here examined for the case when the orifice is located at the centre of the base of a cylindrical vessel. The two phase flow which is confined to a cone region is approximated by the drift flux model. The governing equations for the recirculating liquid flow are quai-lineafized and the flow domain is transformed by a simple transformation into a cylindrical region. Using standard finite difference techniques numerical solutions are obtained for Reynolds numbers in the range 0-104; Re = PUoR0//,tteff, where R 0 is the radius of the vessel, U 0 the velocity of injection of the gas, p the density of the liquid phase & #elf the constant effective turbulent viscosity. For large Re it is shown that the primary recirculating flow is confined to a narrow region adjacent to the two phase/liquid interface.

πŸ“œ SIMILAR VOLUMES

Mathematical modelling of bubble driven
Mathematical modelling of bubble driven flows in metallurgical processes
✍ Johansen, S. T. ;Boysan, F. ;Ayers, W. H. πŸ“‚ Article πŸ“… 1987 πŸ› Springer 🌐 English βš– 624 KB

The complex fluid dynamics of two-phase bubbly flows in metallurgical reactors is modelled numerically by using a k-e turbulence model for the liquid phase, with a driving force determined by considering the motion of the bubbles. The latter are affected by the buoyancy forces and the drag caused by

Influence of the wakes in bubble driven
Influence of the wakes in bubble driven multiphase flow systems
✍ J. Schmidt; R. Nassar; A. LΓΌbbert πŸ“‚ Article πŸ“… 1992 πŸ› Elsevier Science 🌐 English βš– 570 KB

Local miring due to bubbles rising in a liquid medium has been investigated. It is shown that mixing in the bulk fluid is largely influenced by liquid transport in the bubble wake in conformity with experimental observations. A stochastic model has been developed to explain this bubble wake phenomen