An experimental study on mixed convection in a horizontal rectangular channel heated from a side

Chie Gau, Y. C. Jeng, C. G. Liu

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25 Citations (Scopus)

Abstract

Mixed convection in channels has received great interest in the last three decades for its application in the solar energy collectors, heat exchangers, geothermal energy systems, chemical deposition of solid layer in the semiconductor industry, and the cooling of the nuclear reactor and modern electronic equipment. The mixed convection flow and heat transfer in a horizontal rectangular channel heated from a side was studied experimentally. Due to the vertical buoyancy force, the heated buoyant flow moved upward and accumulated in the upper region of the channel. The accumulated flow was thermally stable, which grew in size with increasing buoyancy parameter. However, by keeping the buoyancy parameter constant, the variation of the Reynolds number did not have any effect on the size, shape, and location of the accumulated flow. The increase of the buoyancy parameter either by increasing Grashof number or decreasing Reynolds number would identically lead to an increase in the normalized Nusselt number. The increase in the normalized Nusselt numbers were proportional to the buoyancy parameter. Correlations of the local and the averaged Nusselt number in terms of buoyancy parameter were successfully obtained. The Nusselt number results were very close to the prediction similar to the case of a horizontal flow through a heated vertical plate.

Original languageEnglish
Pages (from-to)701-707
Number of pages7
JournalJournal of Heat Transfer
Volume122
Issue number4
DOIs
Publication statusPublished - 2000 Nov 1

All Science Journal Classification (ASJC) codes

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

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