Two-phase slug flow across small diameter tubes with the presence of vertical return bend

Chi-Chuan Wang, Ing Youn Chen, Pi Shan Huang

Research output: Contribution to journalArticle

36 Scopus citations

Abstract

This study examines the two-phase slug flow across small diameter tubes with the presence of vertical U-type return bends. The translational velocity of the air slug across return bend usually peaks at an angle of π/2-3π/4. The increase of translational velocity is especially pronounced when flow enters at the lower tube with a smaller curvature ratio. An approximately twofold increase of the slug velocity is observed at a curvature ratio of 3. Dimensionless correlations for flowing upwards and downwards with a mean deviation of 18.7% and 24.5% are proposed that can describe the variation of translational velocity within the return bend.

Original languageEnglish
Pages (from-to)2342-2346
Number of pages5
JournalInternational Journal of Heat and Mass Transfer
Volume48
Issue number11
DOIs
StatePublished - 1 May 2005

Keywords

  • Return bend
  • Slug flow
  • Translational velocity

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