Determination of the interface curvature in stratified two-phase systems by energy considerations

N. Brauner*, J. Rovinsky, D. Moalem Maron

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A configuration of a plane interface between two stratified layers is appropriate for two-phase systems which are dominated by gravity, as is the case for large scale air-water systems under earth gravitation. However, for a general two-fluid system, the basic in situ configuration is stratified layers with a curved interface. The prescription of the characteristic interface curvature is required in order to initiate the solution of the flow problem and the associated transport phenomena. Energy considerations are employed to predict the interface configuration. The effect of the fluid physical properties, in situ hold up, tube dimension, wall adhesion and gravitation on the characteristic interface curvature are explored. The prediction of interface curvature provides the closure relation required for a complete solution of stratified flows with curved interfaces for a variety of two-fluid systems.

Original languageEnglish
Pages (from-to)1167-1185
Number of pages19
JournalInternational Journal of Multiphase Flow
Issue number6
StatePublished - Nov 1996


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


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