IMECH-IR  > 流固耦合系统力学重点实验室
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.
Source Publication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
Conference Name第二届全球华人水动学学术会议/2nd Conference of Global Chinese Scholars on Hydrodynamics (CCSH '2016)
Conference DateNOV 11-14, 2016
Conference Place中国江苏无锡/Wuxi, PEOPLES R CHINA
AbstractThe 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.
KeywordSmoothed Particle Hydrodynamics (Sph) Fluid-structure Interaction Flexible Fiber Drag Reduction Smoothed Particle Hydrodynamics Drag Reduction Flow Sph Reconfiguration
WOS IDWOS:000389297200042
ISBN978-7-5027-9607-5
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Indexed ByCPCI-S ; SCI ; EI
Language英语
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Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/60197
Collection流固耦合系统力学重点实验室
Corresponding AuthorLiu, 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.
Recommended Citation
GB/T 7714
Yang XF,Liu MB,Liu, MB ,et al. Bending modes and transition criteria for a flexible fiber in viscous flows[C],2016.
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