Expansion of injected gas bubble and its effects on bath mixing under reduced pressure

Teruhisa Tatsuoka, Chizuna Kamata, Kimihisa Ito

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The behavior of a single bubble was observed and the complete mixing time was measured under reduced pressure ( ∼ 1.33 × 102 Pa (1 Torr)) using a silicon oil model. The bubble expanded greatly and changed from oval to a spherical-cup shape. The complete mixing time tended to be constant independent of the stirring power of gas per unit bath volume in the low vessel pressure range ( < 6.66 × 102Pa), because most of the expansion energy was dissipated and the mixing occurred near the bath surface; this was confirmed by observation of the flow.

Original languageEnglish
Pages (from-to)557-561
Number of pages5
JournalISIJ International
Volume37
Issue number6
DOIs
Publication statusPublished - 1997 Jan 1

Keywords

  • Complete mixing time
  • Local stirring power
  • Optical fiber probe
  • Single bubble
  • Steelmaking
  • Vacuum refining

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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