Motion of large gas bubbles through liquids in vertical concentric and eccentric annuli

V. C. Kelessidis, A. E. Dukler

Research output: Contribution to journalArticle

30 Citations (Scopus)


Taylor bubbles rising through liquids in vertical circular tubes and between parallel planes are axisymmetric and nearly spherical at the top. In a vertical annulus, however, the bubbles are radially asymmetric and never occupy the whole cross-sectional area. Analysis indicates that axisymmetric bubbles rise in an annulus at lower rates than those observed experimentally and hence are never observed in practice. In contrast, the asymmetric bubbles take an elliptic shape which results in higher rise velocities. A theoretical model for the rise velocity of an elliptic bubble has been developed and the comparison with experiment is satisfactory.

Original languageEnglish
Pages (from-to)375-390
Number of pages16
JournalInternational Journal of Multiphase Flow
Issue number3
Publication statusPublished - 1 Jan 1990



  • Taylor bubbles
  • annulus
  • rise velocity

ASJC Scopus subject areas

  • Mechanical Engineering
  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes

Cite this