Heat transfer in a twin-blow narrow channel with two opposite walls roughened by skewed ribs arranged in staggered manner

S. W. Chang, K. F. Chiang, T. L. Yang, P. H. Chen

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

This experimental study performs the detailed heat transfer measurements over a skewed-rib roughened surface in a rectangular narrow channel with two equal-area flow entrances located on two adjacent edges of a channel-corner. This flow configuration allows for increasing the coolant-flow fed into the narrow channel without increasing the height of assembly in order to enhance the capacity of cooling duty for electronic chipsets. At a specified total coolant mass flow rate, four test scenarios, namely the single-blow from the side or upper entrance and the twin-blow with the coolant mass flow ratio of 1: 1 or 2:1 between the side and upper blows are performed. A selection of full-field heat transfer distributions over the rib-roughened surface illustrates the manner by which the flow entry condition and the Reynolds number affect the local and spatially averaged heat transfers. With fixed total coolant consumptions, the twin-blow with the coolant mass flow ratio of 2:1 between the side and upper blows elevates the spatially averaged heat transfers to the levels of 150-180% of the single-blow references. A regression-type analysis is subsequently performed to develop the correlation of spatially-averaged Nusselt numbers over rib-roughened surface, which permits the effect of Reynolds number on heat transfer to be determined for four test scenarios.

Original languageEnglish
Pages (from-to)694-708
Number of pages15
JournalInternational Journal of Thermal Sciences
Volume44
Issue number7
DOIs
Publication statusPublished - 2005 Jul 1

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coolants
Coolants
heat transfer
Heat transfer
mass flow
entrances
Reynolds number
mass flow rate
Nusselt number
entry
regression analysis
assembly
Flow rate
Cooling
cooling
configurations
electronics

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Engineering(all)

Cite this

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title = "Heat transfer in a twin-blow narrow channel with two opposite walls roughened by skewed ribs arranged in staggered manner",
abstract = "This experimental study performs the detailed heat transfer measurements over a skewed-rib roughened surface in a rectangular narrow channel with two equal-area flow entrances located on two adjacent edges of a channel-corner. This flow configuration allows for increasing the coolant-flow fed into the narrow channel without increasing the height of assembly in order to enhance the capacity of cooling duty for electronic chipsets. At a specified total coolant mass flow rate, four test scenarios, namely the single-blow from the side or upper entrance and the twin-blow with the coolant mass flow ratio of 1: 1 or 2:1 between the side and upper blows are performed. A selection of full-field heat transfer distributions over the rib-roughened surface illustrates the manner by which the flow entry condition and the Reynolds number affect the local and spatially averaged heat transfers. With fixed total coolant consumptions, the twin-blow with the coolant mass flow ratio of 2:1 between the side and upper blows elevates the spatially averaged heat transfers to the levels of 150-180{\%} of the single-blow references. A regression-type analysis is subsequently performed to develop the correlation of spatially-averaged Nusselt numbers over rib-roughened surface, which permits the effect of Reynolds number on heat transfer to be determined for four test scenarios.",
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Heat transfer in a twin-blow narrow channel with two opposite walls roughened by skewed ribs arranged in staggered manner. / Chang, S. W.; Chiang, K. F.; Yang, T. L.; Chen, P. H.

In: International Journal of Thermal Sciences, Vol. 44, No. 7, 01.07.2005, p. 694-708.

Research output: Contribution to journalArticle

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