Stability and Drag Reduction in Transient Channel Flow of Fibre Suspension

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Stability and Drag Reduction in Transient Channel Flow of Fibre Suspension

YOU Zhenjiang^a; LIN Jianzhong^a; SHAO Xueming^a; ZHANG Weifeng^b

^aDepartment of Mechanics, State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China Department of Mechanics, State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
^b Institute of Marine and Coastal Sciences, Rutgers University, New Brunswick, New Jersey, USA, 08903-0231

Received:1900-01-01 Revised:1900-01-01 Online:2004-06-28 Published:2004-06-28
Contact: YOU Zhenjiang

槽道纤维悬浮流动转捩阶段稳定性与减阻研究

游振江^a; 林建忠^a; 邵雪明^a; 张卫峰^b

^aDepartment of Mechanics, State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China Department of Mechanics, State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
^b Institute of Marine and Coastal Sciences, Rutgers University, New Brunswick, New Jersey, USA, 08903-0231

通讯作者: 游振江

Abstract

Abstract: Drag reduction features in the transition regime of channel flow with fibre suspension were analyzed in terms of the linear stability theory. The modified stability equation was obtained based on the slender-body theory and natural closure approximation. Results of the stability analysis show attenuating effects of fibre additives to the flow instability. For the cases leading to transition, drag reduction rate increases with the characteristic parameter H of fibres. The mechanism of drag reduction by fibres is revealed through the variation of velocity profile and the decrease of wall shear stress. The theoretical results are qualitatively consistent with some typical experiments.

Key words: drag reduction, flow stabi8lity, fibre suspension, channel flow

摘要： Drag reduction features in the transition regime of channel flow with fibre suspension were analyzed in terms of the linear stability theory. The modified stability equation was obtained based on the slender-body theory and natural closure approximation. Results of the stability analysis show attenuating effects of fibre additives to the flow instability. For the cases leading to transition, drag reduction rate increases with the characteristic parameter H of fibres. The mechanism of drag reduction by fibres is revealed through the variation of velocity profile and the decrease of wall shear stress. The theoretical results are qualitatively consistent with some typical experiments.

关键词: 纤维;管道流;聚合物;阳离子表面活性剂;生产技术

YOU Zhenjiang,LIN Jianzhong,SHAO Xueming,ZHANG Weifeng. Stability and Drag Reduction in Transient Channel Flow of Fibre Suspension[J]. .

游振江,林建忠,邵雪明,张卫峰. 槽道纤维悬浮流动转捩阶段稳定性与减阻研究[J]. CIESC Journal.

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