Rayleigh-Bénard Convection in Shear Enclosure:The Role of Thermal Instabilities

Siddiqui, Abid T., Arqam, Mohammad, Ahmad, Haroon and Husain, Shahid (2017) Rayleigh-Bénard Convection in Shear Enclosure:The Role of Thermal Instabilities. Materials Today: Proceedings, 4 (9). pp. 9951-9955. ISSN 2214-7853

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Abstract

DNS has been carried out for Rayleigh-Bénard convection for two-dimensional flow in a shear enclosure at fixed Reynolds number of 10,000 and Richardson numbers 0, 25, 50, 75, 87.5, while Prandtl number was fixed as 7.0. The key effect observed was that (apart from the basic vortical flow in an enclosure due to the shearing effects) there was simultaneous induction of buoyancy driven flow in an enclosure due to the convection of heat in the flow. For the cases with low and moderate Richardson number the resulting flow was found to be unperturbed, steady and laminar with an original vortical flow unaltered while for cases with high Richardson numbers the resulting flow was found to be unstable and chaotic in nature that attains a quasi-steady state after a certain period of time with strong bifurcations.

Item Type: Article
Additional Information: Publisher Copyright: © 2017 Elsevier Ltd. All rights reserved.
Uncontrolled Keywords: bifurcations,chaos,rayleigh-bénard convection,thermal instabilities,general materials science ,/dk/atira/pure/subjectarea/asjc/2500/2500
Faculty \ School: Faculty of Science > School of Engineering, Mathematics and Physics
UEA Research Groups: Faculty of Science > Research Groups > Fluids & Structures
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Depositing User: LivePure Connector
Date Deposited: 29 Jun 2026 13:51
Last Modified: 08 Jul 2026 14:36
URI: https://ueaeprints.uea.ac.uk/id/eprint/103517
DOI: 10.1016/j.matpr.2017.06.300

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