Articles


Document Type
Journal article (JA)
Title
Cascade-like and cyclic heat transfer characteristics affected by enclosure aspect ratios for low Prandtl numbers
Author
Wang, Bin(1,2); Shih, Tien-Mo(1,2); Chen, Xiwen(1); Chang, Richard Ru-Gin(3); Wu, Chen-Xu(1,2)
Address
(1) Department of Physics, Xiamen University, 422 Siming South Road, Xiamen; 361005, China; (2) Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Xiamen University, Xiamen; 361005, China; (3) Shineraytek Optoelectric Company and Zing Semiconductor Corporation, Shanghai; 201306, China
RPAddress
Email
ResearchID
ORCID
Journal
International Journal of Heat and Mass Transfer
Publisher
Elsevier Ltd
ISSN
0017-9310
Published
2018-09, 124:131-140.
JCR
2
ImpactFactor
3.458
ISBN
Fund_Code
HYMC
HYDD
HYKSRQ
HYJSRQ
HYLWLB
HYJB
Keywords
Aspect ratio - Enclosures - Natural convection - Prandtl number
Abstract
For low Prandtl-number fluids, heat-transfer characteristics under the influence of the aspect ratio for buoyancy-driven recirculating flows in rectangular enclosures (with left hot, right cold, top/bottom insulated walls) behave differently from those for high-Pr fluids. At Ra=106and Pr=0.025, as the enclosure widens, time-averaged and hot-wall-spatially-averaged heat transfer first decreases, then cascades downward. Locally, heat transfer peaks at a few locations, and these peaks travel cyclically as time elapses. For completeness, the present study serves as a sequel of a previous high-Pr investigation. ? 2018
WOS Categories
Accession Number
EI收录号
20181304938995
DOI
10.1016/j.ijheatmasstransfer.2018.03.060
ESI_Type
ENGINEERING
Collection
EI

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