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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/46581

Title: Spanwise bifurcation in plane symmetric sudden-expansion flows
Authors: Chiang TP;Sheu TW;Hwang RR;Sau A.
Contributors: 國立臺灣海洋大學:系統工程暨造船學系
Date: 2002
Issue Date: 2018-05-24T06:43:52Z
Publisher: Phys Rev E Stat Nonlin Soft Matter Phys
Abstract: Abstract:Present computational investigation reports a steady bifurcation phenomenon for three-dimensional flows through a plane-symmetric sudden expansion. When the channel aspect ratio exceeds a critical value, the well-known step height (pitchfork) bifurcation evolves with different symmetry breaking orientations on the left and right sides of the channel and bifurcates in the spanwise direction. For the channel aspect ratio less than the critical value, the originally occurring spanwise bifurcation cannot be stably retained and evolves eventually to a step height bifurcation. Compared to step height bifurcation, the spanwise bifurcation is found to be more difficult to obtain, because the symmetric flow present on the spanwise symmetry plane is unstable in two dimensions. For completeness, an extensive analysis of the observed spanwise bifurcation, covering its transient behavior, dependence on flow Reynolds number, channel aspect ratio, and expansion ratio, is included.
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/46581
Appears in Collections:[系統工程暨造船學系] 期刊論文

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