• TRANSPORT PHENOMEN A & FLUID MECHANICS • 下一篇
游振江a; 林建忠a; 邵雪明a; 张卫峰b
a Department 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
YOU Zhenjianga; LIN Jianzhonga; SHAO Xueminga; ZHANG Weifengb
a Department 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
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.
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