Transition to a periodic flow induced by a thin fin on the sidewall of a differentially heated cavity

Xu, Feng, Patterson, John C., and Lei, Chengwang (2009) Transition to a periodic flow induced by a thin fin on the sidewall of a differentially heated cavity. International Journal of Heat and Mass Transfer, 52 (3-4). pp. 620-628.

[img] PDF (Published Version)
Restricted to Repository staff only

View at Publisher Website: http://dx.doi.org/10.1016/j.ijheatmasstr...

Abstract

The transition to a periodic flow induced by a thin fin on the sidewall of a differentially heated cavity is numerically investigated. The numerical results are compared with a previously reported experiment. It is demonstrated that the transient flow obtained numerically shows features consistent with the experimental flow. Based on the present numerical results, the temporal development and spatial structures of the thermal flow around the fin are described, and the separation of the thermal flow above the fin is discussed. It is found that the presence of the fin changes the flow regime and results in the transition of the thermal flow to a periodic flow. The present numerical results also indicate that the unstable temperature configuration above the fin results in intermittent plumes at the leeward side of the fin, which in turn induce strong oscillations of the downstream boundary layer flow. It is demonstrated that the oscillations of the boundary layer flow significantly enhance the heat transfer through the finned sidewall (by up to 23%).

Item ID: 11309
Item Type: Article (Refereed Research - C1)
Keywords: fin; differentially heated cavity; oscillations; heat transfer
ISSN: 1879-2189
Date Deposited: 22 May 2010 02:57
FoR Codes: 09 ENGINEERING > 0907 Environmental Engineering > 090702 Environmental Engineering Modelling @ 100%
SEO Codes: 86 MANUFACTURING > 8698 Environmentally Sustainable Manufacturing > 869899 Environmentally Sustainable Manufacturing not elsewhere classified @ 100%
Citation Count from Web of Science Web of Science 9
Downloads: Total: 1
More Statistics

Actions (Repository Staff Only)

Item Control Page Item Control Page