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Effect of uneven wall temperature on local heat transfer in a rotating square channel with smooth walls and radial outward flowThe effect of uneven wall temperature on the local heat transfer coefficient in a rotating square channel with smooth walls and radial outward flow is investigated for Reynolds numbers from 2500 to 25,000 and rotation numbers from 0 to 0.352. Three cases of thermal boundary conditions are studied: (1) four walls uniform temperature, (2) four walls uniform heat flux, and (3) leading and trailing walls hot and two side walls cold. It is shown that the heat transfer coefficients on the leading surface are much lower than that of the trailing surface due to rotation. For case 1, the leading surface heat transfer coefficient decreases and then increases with increasing rotation numbers, and the trailing surface heat transfer coefficient increases monotonically with rotation numbers. The trailing surface heat transfer coefficients, as well as those for the side walls, for case 2 are higher than for case 1, and the leading surface heat transfer coefficients for cases 2 and 3 are significantly higher than for case 1.
Document ID
19930034561
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Han, J.-C.
(NASA Headquarters Washington, DC United States)
Zhang, Y. M.
(Texas A & M Univ. College Station, United States)
Date Acquired
August 15, 2013
Publication Date
November 1, 1992
Publication Information
Publication: ASME, Transactions, Journal of Heat Transfer
Volume: 114
Issue: 4
ISSN: 0022-1481
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
93A18558
Distribution Limits
Public
Copyright
Other

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