Transient natural convection flow in a cavity subject to time-varying sidewall heating and cooling

Zhou, L., Armfield, S.W., Williamson, N., Kirkpatrick, M.P., and Lin, Wenxian (2016) Transient natural convection flow in a cavity subject to time-varying sidewall heating and cooling. In: Proceedings of the 20th Australasian Fluid Mechanics Conference. 516. From: AFMC 2016: 20th Australasian Fluid Mechanics Conference, 5-8 December 2016, Perth, WA, Australia.

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Abstract

The flow development and behaviour of a fluid in a two-dimensional cavity, heated and cooled periodically from one sidewall, with all other walls adiabatic, is investigated via numerical simulation. The heating and cooling on the sidewall produce alternating direction vertical natural convection boundary layers that entrain fluid from the cavity interior and discharge it at the top and bottom of the cavity. At start up and during a transition phase the heat content of the cavity, which is biased by the initial heating phase, has a non-zero mean. At full development the flow is quasi steady with the natural convection boundary layers maintaining a stable stratification in the cavity interior and the heat content oscillating around a zero mean value. The stratification strength is shown to be strongly dependent on the forcing frequency.

Item ID: 47477
Item Type: Conference Item (Research - E1)
ISBN: 978-1-74052-377-6
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Funders: Australian Research Council (ARC)
Date Deposited: 07 Mar 2017 02:38
FoR Codes: 09 ENGINEERING > 0915 Interdisciplinary Engineering > 091504 Fluidisation and Fluid Mechanics @ 50%
09 ENGINEERING > 0915 Interdisciplinary Engineering > 091505 Heat and Mass Transfer Operations @ 20%
09 ENGINEERING > 0915 Interdisciplinary Engineering > 091501 Computational Fluid Dynamics @ 30%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970109 Expanding Knowledge in Engineering @ 100%
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