𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Bubble formation at submerged nozzles for small gas flow rate under low gravity

✍ Scribed by Hideki Tsuge; Koichi Terasaka; Wataru Koshida; Hirokazu Matsue

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
429 KB
Volume
52
Category
Article
ISSN
0009-2509

No coin nor oath required. For personal study only.

✦ Synopsis

To develop gas-liquid contacting processes in space stations, bubble formation at a nozzle submerged in liquid under low gravity was discussed. Effects of gas flow rate and surface tension on bubble formation were experimentally investigated over a 10 s period using the drop shaft of Japan Microgravity Center at Kamisunagawa in Japan. When the gas flow rate is comparatively small, a spherical bubble does not detach from the nozzle and continues to expand in quiescent liquids. To theoretically describe bubble formation under low gravity, the non-spherical bubble formation model was used. It is predicted by this model that bubble volume increases under constant flow conditions and a bubble does not detach from a nozzle when the gas flow rate is small in a quiescent liquid. These calculated results of bubble volume and shape agree well with the experimental ones. (3 1997 Elsevier Science Ltd

πŸ“œ SIMILAR VOLUMES

A model for steam bubble formation at a
A model for steam bubble formation at a submerged nozzle in flowing subcooled water
✍ W.B. Chen; Reginald B.H. Tan πŸ“‚ Article πŸ“… 2001 πŸ› Elsevier Science 🌐 English βš– 277 KB

A non-spherical model for bubble formation coupled with phase change at a submerged nozzle in a Β―owing subcooled liquid is presented. The interface element approach is applied to describe the dynamics of bubble formation. The bubble is assumed to be surrounded by a thin thermal boundary layer, in wh