Drag and heat transfer reduction phenomena of drag-reducing surfactant solutions in straight and helical pipes

Wael I.A. Aly, Hideo Inaba, Naoto Haruki, Akihiko Horibe

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Flow drag and heat transfer reduction phenomena of non-ionic aqueous surfactant solutions flowing in helical and straight pipes have been experimentally investigated at surfactant solution concentration range of 250-5000 ppm and temperature range of 5-20°C. The helically coiled pipes have curvature ratios range of 0.018-0.045. Experimental findings indicate that the friction factors and the heat transfer coefficients of the surfactant solution in helical pipes are significantly higher than in a straight pipe and lower than Newtonian fluid flow like water through the same coils in the turbulent drag reduction region. Drag reduction and heat transfer reduction increase with an increase in surfactant solution concentration and temperature in the measured concentration and temperature ranges. On the other hand, they decrease with increasing of the curvature ratio. A set of empirical expressions for predicting the friction factor and the average Nusselt number for the surfactant solution's flow through helical and straight pipes have been regressed based on the obtained data in the present experiments.

Original languageEnglish
Pages (from-to)800-810
Number of pages11
JournalJournal of Heat Transfer
Volume128
Issue number8
DOIs
Publication statusPublished - Dec 28 2006

Keywords

  • Connective heat transfer
  • Curvature ratio
  • Drag reduction
  • Helical pipe
  • Secondary-flow
  • Surfactant

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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