Modeling flow pattern transitions for upward gas-liquid flow in vertical concentric and eccentric annuli

V. C. Kelessidis, A. E. Dukler

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124 Citations (Scopus)


Flow patterns were investigated in vertical upward gas-liquid flow in a concentric and an eccentric annulus (eccentricity 50%). A new method for flow pattern identification is proposed based on probability density function analysis of conductance probe signals. Flow pattern maps have been constructed and mathematical models are proposed which predict the flow pattern transitions.

Original languageEnglish
Pages (from-to)173-191
Number of pages19
JournalInternational Journal of Multiphase Flow
Issue number2
Publication statusPublished - 1 Jan 1989



  • annulus
  • flow patterns
  • gas-liquid flow

ASJC Scopus subject areas

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

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