Bubble formation at a nozzle submerged in viscous liquids having yield stress

Koichi Terasaka, Hideki Tsuge

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

The effects of operating conditions on bubble volume formed from a nozzle submerged in some viscous media with yield stress were experimentally investigated. Pressure fluctuations in the gas chamber accompanied by bubble formation as well as bubble growth curves were measured. By analysis of the time course of pressure change in the gas chamber, the dependency of the gas flow rate into the gas chamber and the chamber volume on the polytropic coefficient of gas in the gas chamber was discussed. To simulate the bubble formation at a single nozzle in a viscous medium having yield stress, the non-spherical bubble formation model was proposed. The calculated bubble volumes agreed relatively well with the experimental ones.

Original languageEnglish
Pages (from-to)3237-3245
Number of pages9
JournalChemical Engineering Science
Volume56
Issue number10
DOIs
Publication statusPublished - 2001 Jun 12

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Keywords

  • Bubble
  • Bubble columns
  • Bubble formation
  • Non-Newtonian fluids
  • Simulation
  • Yield stress

ASJC Scopus subject areas

  • Chemical Engineering(all)

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