Heat transfer model for gas-liquid slug flows under constant flux

Patrick A. Walsh, Edmond J. Walsh, Yuri S. Muzychka

Research output: Contribution to journalArticlepeer-review

Abstract

This paper investigates the mechanisms leading to enhanced heat and/or mass transfer rates in two-phase non-boiling slug flows. The problem is analyzed in a minichannel geometry subjected to a constant heat flux boundary. Local Nusselt numbers, obtained using Infrared thermography are analyzed in both entrance and fully developed flow regions. These novel measurements highlight the physics governing slug-flow heat transfer and results indicate that optimized slug geometries can yield up to an order of magnitude heat transfer enhancement. Finally, based on the physics identified, a heat transfer model is developed which is also applicable to similar mass transfer problems.

Original languageEnglish
Pages (from-to)3193-3201
Number of pages9
JournalInternational Journal of Heat and Mass Transfer
Volume53
Issue number15-16
DOIs
Publication statusPublished - Jul 2010

Keywords

  • Heat transfer
  • Mass transfer
  • Non-boiling
  • Slug aspect ratio
  • Slug flow
  • Thermography
  • Two-phase

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