Simulation of a turbulent annulus with interfacial waves in core-annular pipe flow

Haoyu Li*, M. J.B.M. Pourquié, G. Ooms, R. A.W.M. Henkes

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)
16 Downloads (Pure)


Interfacial waves in core-annular pipe flow are studied through two-phase numerical simulations. Here the water annulus is turbulent, whereas the oil core stays laminar. The low-Reynolds number Launder & Sharma k−ε model is applied. By extracting the moving wave shape from the two-phase results and imposing this as a solid boundary in a single-phase simulation for the water annulus gives single-phase results (for the pressure drop and holdup ratio) that are in close agreement with values obtained from the two-phase approach. The influence of wave amplitude and wave length on the pressure drop and hold up ratio is then studied by using the single-phase flow model. This gives insight in the appearance of core-annular flow, where the water-based Fanning wall-friction factor and the hold-up ratio are selected as the most important quantities. The effect of watercut and eccentricity on these quantities is also investigated.

Original languageEnglish
Article number104152
Number of pages16
JournalInternational Journal of Multiphase Flow
Publication statusPublished - 2022


  • Core-annular flow
  • friction factor
  • hold-up ratio
  • interfacial waves


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