Shadowgraph observations of the transition of the thermal boundary layer in a side-heated cavity

Xu, Feng, Patterson, John C., and Lei, Chengwang (2005) Shadowgraph observations of the transition of the thermal boundary layer in a side-heated cavity. Experiments in Fluids, 38 (6). pp. 770-779.

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Abstract

The transition of the thermal boundary layer from start-up to a quasi-steady state in a side-heated cavity is observed using a shadowgraph technique. Three stages of the transition, including an initial growth stage, an entrainment development stage and a quasi-steady stage, are demonstrated. A significant feature of the transition revealed from the present flow visualisation is the formation of a double-layer structure along the sidewall at the entrainment development stage. It is believed that the reverse flow in the double-layer structure is the likely cause responsible for the unstable travelling waves at the quasi-steady state.

Item ID: 6326
Item Type: Article (Refereed Research - C1)
Keywords: buoyancy; natural convection; shadowgraph; side-heated cavity; thermal boundary layer; transition
ISSN: 1432-1114
Date Deposited: 17 Feb 2010 06:16
FoR Codes: 09 ENGINEERING > 0915 Interdisciplinary Engineering > 091504 Fluidisation and Fluid Mechanics @ 60%
09 ENGINEERING > 0915 Interdisciplinary Engineering > 091505 Heat and Mass Transfer Operations @ 30%
09 ENGINEERING > 0915 Interdisciplinary Engineering > 091508 Turbulent Flows @ 10%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970102 Expanding Knowledge in the Physical Sciences @ 100%
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