Free convective heat transfer in tilted longitudinal open cavity

Shyy-Woei Chang, S. F. Chiou, L. M. Su, T. L. Yang

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Heat transfer experiments were performed to investigate the effects of inclination and channel height-to-gap ratio on free convection in a simulated fin-passage with a strategic aim of devising a criterion for selecting the optimal fin length that could provide the maximum free convective capability. The ranges of parameters investigated include the Grashof number, up to 500, 000; channel height-to-gap ratios of 1, 2, and 3; and tilt angles of 0°, 30°, 60°, 90°, 120°, 150°, and 180°. Selections of local and spatially averaged Nusselt number results demonstrate the manner by which the Grashof number, tilt angle, and channel height-to-gap ratio interactively affect the heat transfer. In conformity with the experimentally revealed heat transfer physics, the correlation of a spatially-averaged Nusselt number over two parallel walls and the bottom surface of an open-ended channel is derived that permits the individual and interactive effects of the Grashof number, tilt angle, and channel height-to-gap ratio on heat transfers to be evaluated. A criterion for selecting the optimal height-to-gap ratio of the fin channel is subsequently formulated as a design tool for maximizing the convective capability of a free convective fin assembly.

Original languageEnglish
Pages (from-to)46-64
Number of pages19
JournalHeat Transfer Engineering
Volume26
Issue number10
DOIs
Publication statusPublished - 2005 Jan 1

Fingerprint

convective heat transfer
Grashof number
fins
Heat transfer
cavities
Nusselt number
heat transfer
Natural convection
Physics
free convection
inclination
assembly
physics
Experiments

All Science Journal Classification (ASJC) codes

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

Cite this

Chang, Shyy-Woei ; Chiou, S. F. ; Su, L. M. ; Yang, T. L. / Free convective heat transfer in tilted longitudinal open cavity. In: Heat Transfer Engineering. 2005 ; Vol. 26, No. 10. pp. 46-64.
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Free convective heat transfer in tilted longitudinal open cavity. / Chang, Shyy-Woei; Chiou, S. F.; Su, L. M.; Yang, T. L.

In: Heat Transfer Engineering, Vol. 26, No. 10, 01.01.2005, p. 46-64.

Research output: Contribution to journalArticle

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