Bending modes and transition criteria for a flexible fiber in viscous flows

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	Bending modes and transition criteria for a flexible fiber in viscous flows
	Yang XF(杨秀峰); Liu MB(刘谋斌); Liu, MB (reprint author), Peking Univ, Coll Engn, Beijing 100871, Peoples R China.; Liu, MB (reprint author), Peking Univ, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China.
会议录名称	第二届全球华人水动力学学术会议论文集（下册） 2016/Proceedings of the Second Conference of Global Chinese Scholars on Hydrodynamics (CCSH'2016), Vols 1 & 2
	2016
会议名称	第二届全球华人水动学学术会议/2nd Conference of Global Chinese Scholars on Hydrodynamics (CCSH '2016)
会议日期	NOV 11-14, 2016
会议地点	中国江苏无锡/Wuxi, PEOPLES R CHINA
摘要	The present paper follows our previous Work [Yang et al. Physical Review E, vol. 90 (2014) 063011] in which a coupling approach of smoothed particle hydrodynamics (SPH) and element bending group (EBG) was developed for modeling the interaction of viscous incompressible flows with flexible fibers. It was also shown that a flexible object may experience drag reduction because of its reconfiguration due to fluid force on it. However, the reconfiguration of deformable bodies does not always result in drag reduction as different deformation patterns can result in different drag scales. In the present work, we studied the bending modes of a flexible fiber in viscous flows using the presented SPH and EBG coupling approach. The flexible fiber is immersed in a fluid and is tethered at its center point, while the two ends of the fiber are free to move. We showed that the fiber undergoes four different bending modes: stable U-shape, slight swing, violent flapping, and stable closure modes. We found there is a transition criterion for the flexible fiber from slight swing, suddenly to violent flapping. We defined a bending number to characterize the bending dynamics of the interaction of flexible fiber with viscous fluid and revealed that this bending number is relevant to the non-dimensional fiber length. We also identified the critical bending number from slight swing mode to violent flapping mode.
关键词	Smoothed Particle Hydrodynamics (Sph) Fluid-structure Interaction Flexible Fiber Drag Reduction Smoothed Particle Hydrodynamics Drag Reduction Flow Sph Reconfiguration
WOS记录号	WOS:000389297200042
ISBN号	978-7-5027-9607-5
URL	查看原文
收录类别	CPCI-S ; SCI ; EI
语种	英语
引用统计
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/60197
专题	流固耦合系统力学重点实验室
通讯作者	Liu, MB (reprint author), Peking Univ, Coll Engn, Beijing 100871, Peoples R China.; Liu, MB (reprint author), Peking Univ, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China.
推荐引用方式 GB/T 7714	Yang XF,Liu MB,Liu, MB ,et al. Bending modes and transition criteria for a flexible fiber in viscous flows[C]第二届全球华人水动力学学术会议论文集（下册） 2016/Proceedings of the Second Conference of Global Chinese Scholars on Hydrodynamics (CCSH'2016), Vols 1 & 2,2016.

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