Unsteady turbulent heat transfer of mixed convection in a reciprocating circular ribbed channel

Horng Wen Wu, Chin Teck Lau

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The SIMPLE-C scheme is used to solve the mass, momentum, energy conservation equations and turbulent k-ε equations with a two-layer model near wall for a fluid past a reciprocating circular ribbed channel when changing Reynolds number (4250-10,000), Grashof number (0-400,000,000), pulsating number (0-9.3) and cooling mediums. The average time-mean Nusselt number for the reciprocating circular ribbed channel can be 45-182% larger than that for the equivalent stationary smooth channel. The heat transfer enhancement produced by buoyancy for the reciprocating circular ribbed channel decreases as the pulsating number increases. The oscillating amplitude of Nusselt number with crank angle in the oil-cooling is less than in the water-cooling.

Original languageEnglish
Pages (from-to)2708-2721
Number of pages14
JournalInternational Journal of Heat and Mass Transfer
Volume48
Issue number13
DOIs
Publication statusPublished - 2005 Jun 1

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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