This paper presents experimental heat transfer results in a two-pass square channel with smooth and ribbed surfaces. The ribs are placed in a staggered half-V fashion with the rotation orthogonal to the channel axis. The channel orientation varies with respect to the rotation plane. A change in the channel orientation about the rotating frame causes a change in the secondary flow structure and associated flow and turbulence distribution. Consequently, the heat transfer coefficient from the individual surfaces of the two-pass square channel changes. The effects of rotation number on local Nusselt number ratio distributions are presented. Heat transfer coefficients with ribbed surfaces show different characteristics in rotation number dependency from those with smooth surfaces. Results show that staggered half-V ribs mostly have higher heat transfer coefficients than those with 90 and 60 deg continuous ribs.
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Local Heat Transfer in Rotating Smooth and Ribbed Two-Pass Square Channels With Three Channel Orientations
S. Dutta,
S. Dutta
Department of Mechanical Engineering, University of South Carolina, Columbia, SC 29208
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J.-C. Han
J.-C. Han
Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843-3123
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S. Dutta
Department of Mechanical Engineering, University of South Carolina, Columbia, SC 29208
J.-C. Han
Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843-3123
J. Heat Transfer. Aug 1996, 118(3): 578-584 (7 pages)
Published Online: August 1, 1996
Article history
Received:
September 20, 1995
Revised:
March 1, 1996
Online:
December 5, 2007
Citation
Dutta, S., and Han, J. (August 1, 1996). "Local Heat Transfer in Rotating Smooth and Ribbed Two-Pass Square Channels With Three Channel Orientations." ASME. J. Heat Transfer. August 1996; 118(3): 578–584. https://doi.org/10.1115/1.2822671
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