The interface configuration in two-phase stratified pipe flows

Dimitri Gorelik, Neima Brauner*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Exact analytical solution is obtained for the interface shape between two immiscible fluids and for the capillary pressure in the case of unidirectional axial laminar pipe flow. The solution is determined by three dimensionless parameters: the holdup, fluid/wall wettability angle and the Eotvos number, Eo = Δρg cos αR212. The ranges of parameter values, for which the model of flat interface (Eo→∞), or models of constant interfacial curvature can be applied, are explored. Finally, the implications to modeling of stratified flow characteristics and stability are discussed.

Original languageEnglish
Pages (from-to)977-1007
Number of pages31
JournalInternational Journal of Multiphase Flow
Issue number6-7
StatePublished - Sep 1999


  • Contact angle
  • Curvature
  • Interface
  • Stratified flow
  • Surface tension
  • Wettability


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