Visualisation of natural convection in an isosceles triangular enclosure heated from below

Lei, C., Xu, F., and Patterson, J.C. (2005) Visualisation of natural convection in an isosceles triangular enclosure heated from below. In: Proceedings of the 5th Pacific Symposium on Flow Visualisation and Image Processing, pp. 1-8. From: 5th Pacific Symposium on Flow Visualisation and Image Processing, 27 - 29 September 2005, Daydream Island, QLD, Australia.

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Abstract

The natural convection flow in an isosceles triangular enclosure subject to heating from below and simultaneous cooling from above is visualized using a shadowgraph technique. It is observed from the present experiments that the transient flow development in the enclosure due to abrupt heating and cooling through the boundaries can be classified into three distinct stages, a startup flow stage, a transitional flow stage, and a quasi-steady flow stage. The major flow features at each of the three stages are described, and the dependence of the flow development on the Grashof number is also discussed. The present flow visualization demonstrates that the natural convection flow remains approximately symmetric at all stages and for all the tested Grashof numbers.

Item ID: 7770
Item Type: Conference Item (Refereed Research Paper - E1)
Keywords: attics; buoyancy; convective instability; flow visualisation; natural convection
ISBN: 978-1-930746-02-2
Date Deposited: 21 Jun 2010 05:47
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 @ 80%
85 ENERGY > 8507 Energy Conservation and Efficiency > 850799 Energy Conservation and Efficiency not elsewhere classified @ 20%
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