Unsteady heat transfer in baffled channels

G. Wang, K. Stone, S. P. Vanka

Research output: Contribution to journalArticle

Abstract

In this paper, the enhancement of heat transfer due to unsteady flow in channels with in-line and staggered baffles is investigated through the numerical solution of the governing unsteady fluid flow and energy equations with periodicity in the streamwise direction. For the inline configuration, the flow becomes naturally unsteady at a critical Reynolds number (Q/v) around 110. For the staggered case, this value is around 200. Significant increases in heat transfer rate are observed once the flow becomes unsteady. Results for several Reynolds numbers up to 500 are presented. The present results can be valuable to the design and operation of compact heat exchangers used in process industry.

Original languageEnglish (US)
Pages (from-to)585-591
Number of pages7
JournalJournal of Heat Transfer
Volume118
Issue number3
DOIs
StatePublished - Aug 1996

Keywords

  • Flow separation
  • Flow transition
  • Forced convection

ASJC Scopus subject areas

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

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