Thermal boundary layer flow and heat transfer in a differentially heated cavity with a thin fin on the sidewall

Xu, F., Patterson, J.C., and Lei, C. (2006) Thermal boundary layer flow and heat transfer in a differentially heated cavity with a thin fin on the sidewall. In: Proceedings of 13th International Heat Transfer Conference. From: 13th International Heat Transfer Conference: IHTC-13, 13-18 August 2006, Sydney, NSW, Australia.

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Abstract

In this paper, a two-dimensional numerical simulation is carried out to investigate the thermal boundary layer flow in a differentially heated cavity with a thin fin at the mid height of the hot wall. It is found that the thin fin changes the transition of the thermal boundary layer flow. In the initial stage, a lower intrusion front forms, bypasses the thin fin, and strikes the intrusion under the ceiling. After the lower intrusion front is convected away, the trailing flow behind it reattaches to the thermal boundary layer. As the stratification in the cavity is enforced, the separation and shedding of the flow around the thin fin become unstable, and thus induce the instability of the thermal boundary layer flow. The transition of the thermal boundary layer flow ultimately approaches a periodic flow in the quasi-steady stage. Due to the instability of the thermal boundary layer triggered by the fin, the heat transfer through the hot wall is significantly enhanced.

Item ID: 4285
Item Type: Conference Item (Refereed Research Paper - E1)
Keywords: natural convection; fluid dynamics; buoyancy; boundary layer
ISBN: 1-56700-225-0
Date Deposited: 21 Oct 2009 04:41
SEO Codes: 97 EXPANDING KNOWLEDGE > 970102 Expanding Knowledge in the Physical Sciences @ 80%
96 ENVIRONMENT > 9609 Land and Water Management > 960999 Land and Water Management of Environments not elsewhere classified @ 20%
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