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

Hideki Tsuge, Koichi Terasaka, Wataru Koshida, Hirokazu Matsue

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)3415-3420
Number of pages6
JournalChemical Engineering Science
Issue number20
Publication statusPublished - 1997 Oct 1


  • Bubble
  • Bubble formation
  • Bubble formation model
  • Drop shaft
  • Low gravity
  • Nozzle

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering


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