Friction Factor Determination for Horizontal Two-Phase Flow Through Fully Eccentric Annuli

Metin C. O. , Ozbayoglu M. E.

PETROLEUM SCIENCE AND TECHNOLOGY, vol.27, no.15, pp.1771-1782, 2009 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 27 Issue: 15
  • Publication Date: 2009
  • Doi Number: 10.1080/10916460802686178
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.1771-1782
  • Keywords: eccentric annuli, flow pattern, friction factor, intermittent flow, multiphase flow, multiphase flow loop, Reynolds number, stratified flow, GAS-LIQUID FLOW, MODEL, TRANSITIONS


In this study, empirical friction factor correlations were developed for two-phase stratified-and intermittent-flow patterns through horizontal fully eccentric annuli. Two-phase flow hydraulics were investigated, and a flow pattern prediction model is proposed. The friction factor correlations were validated using experimental data collected at the multiphase flow loop METU-PETE-CTMFL. Two different geometrical configurations were used during experiments-that is, 0.1143 m inner diameter (ID) casing, 0.0571 m outer diameter (OD) drillpipe; and 0.0932 m ID casing, 0.0488 m OD drillpipe. The eccentric annuli has been represented by representative diameter d(r). A new mixture Reynolds number based on liquid holdup is proposed for friction factor determination.