Journal
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
Volume 98, Issue -, Pages 245-254Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ijthermalsci.2015.07.023
Keywords
Mixed convection; Conjugate heat transfer; Flow reversal; Vertical channel
Categories
Funding
- National Natural Science Foundation of China (NSFC) [51476096]
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Conjugate mixed convection with buoyancy assisted laminar flow in the entrance region of a vertical channel is considered numerically. The problem is solved by a finite volume method for a thick walled, two-regional channel which has constant and uniform outside wall temperatures. The effects of wall thermal conduction as well as assisted buoyancy force on the flow and heat transfer are discussed in detail. Results are presented for a Prandtl number of 0.7, solid-to-fluid thermal conductivity ratios of 1 <= k* < infinity, wall thickness-to-channel length ratios of 0 <= l* <= 5, Reynolds numbers of 200 <= Re <= 1000, and for various Grashof numbers. The critical buoyancy parameter (Gr/Re), above which the flow reversal occurs, increases linearly with the increasing l*/k*, while it is independent on the Reynolds number. (C) 2015 Elsevier Masson SAS. All rights reserved.
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