Phase diagrams for two-phase flow in circular capillary tubes under the influence of a dynamic contact angle

Roland Glantz, Markus Hilpert

Research output: Contribution to journalArticle

Abstract

We analyze theoretically gas-liquid flow in a circular capillary tube, the inlet of which is connected to a constant-pressure liquid reservoir. Based on previously derived analytical solutions, we present for the first time comprehensive, two-dimensional phase diagrams, which predict the flow scenario from only two nondimensional numbers: a nondimensional pressure and a nondimensional gravity parameter. Diagrams are developed for both a constant and a dynamic contact angle where in the latter case the nonequilibrium Young force depends monotonically on the capillary number. The diagrams subdivide the entire parameter space into regions that are associated with either liquid withdrawal, liquid infiltration, or metastable and stable equilibrium states.

Original languageEnglish (US)
Pages (from-to)102-105
Number of pages4
JournalInternational Journal of Multiphase Flow
Volume59
DOIs
StatePublished - Feb 1 2014

Keywords

  • Capillary tube
  • Lucas-Washburn theory
  • Phase diagram

ASJC Scopus subject areas

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

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