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ISSN Online: 2377-424X

ISBN CD: 1-56700-226-9

ISBN Online: 1-56700-225-0

International Heat Transfer Conference 13
August, 13-18, 2006, Sydney, Australia

BIFURCATION AND STABILITY OF CONVECTION IN CURVED RECTANGULAR DUCTS

Get access (open in a dialog) DOI: 10.1615/IHTC13.p20.40
12 pages

Abstract

A numerical study is made on the fully developed bifurcation structure and stability of the forced convection in a curved rectangular duct with the aspect ratio 10 and curvature ratio 0.5. Ten solution branches are found: six symmetric and four asymmetric. The flows on these branches are in a symmetric 2, 4, 6, 8, 10-cell state, and an asymmetric 4, 6, 7, 9, 10-cell state. Dynamic responses of multiple flows to finite random disturbances are examined by the direct transient computation. It is found that physically realizable fully-developed flows evolve, as the Dean number increases, from a stable steady state to a temporal periodic oscillation, a temporal intermittent oscillation, another periodic oscillation and a chaotic oscillation.