Gas/liquid flow behaviours in a downward section of large diameter vertical serpentine pipes

Almabrok A. Almabrok, Aliyu M. Aliyu, Liyun Lao, Hoi Yeung

Research output: Contribution to journalArticle

26 Citations (Scopus)


An experimental study on air/water flow behaviours in a 101.6 mm i.d. vertical pipe with a serpentine configuration is presented. The experiments are conducted for superficial gas and liquid velocities ranging from 0.15 to 30 m/s and 0.07 to 1.5 m/s, respectively. The bend effects on the flow behaviours are significantly reduced when the flow reaches an axial distance of 30 pipe diameters or more from the upstream bend. The mean film thickness data from this study has been used to compare with the predicted data using several falling film correlations and theoretical models. It was observed that the large pipe data exhibits different tendencies and this manifests in the difference in slope when the dimensionless film thickness is plotted as a power law function of the liquid film Reynolds number.

Original languageEnglish
Pages (from-to)25-43
Number of pages19
JournalInternational Journal of Multiphase Flow
Early online date9 Oct 2015
Publication statusPublished - 1 Jan 2016
Externally publishedYes


Cite this