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Dynamics of fluid flow over a circular flexible plate

Published online by Cambridge University Press:  20 October 2014

Ru-Nan Hua ,
Luoding Zhu  and
Xi-Yun Lu
Ru-Nan Hua
Affiliation:
Department of Modern Mechanics, University of Science and Technology of China, Hefei, Anhui 230026, PR China
Luoding Zhu
Affiliation:
Department of Mathematical Sciences, Indiana University – Purdue University Indianapolis, 402 North Blackford Street, Indianapolis, IN 46202, USA
Xi-Yun Lu*
Affiliation:
Department of Modern Mechanics, University of Science and Technology of China, Hefei, Anhui 230026, PR China
*
†Email address for correspondence: xlu@ustc.edu.cn
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Abstract

The dynamics of viscous fluid flow over a circular flexible plate are studied numerically by an immersed boundary–lattice Boltzmann method for the fluid flow and a finite-element method for the plate motion. When the plate is clamped at its centre and placed in a uniform flow, it deforms by the flow-induced forces exerted on its surface. A series of distinct deformation modes of the plate are found in terms of the azimuthal fold number from axial symmetry to multifold deformation patterns. The developing process of deformation modes is analysed and both steady and unsteady states of the fluid–structure system are identified. The drag reduction due to the plate deformation and the elastic potential energy of the flexible plate are investigated. Theoretical analysis is performed to elucidate the deformation characteristics. The results obtained in this study provide physical insight into the understanding of the mechanisms on the dynamics of the fluid–structure system.

JFM classification

Aerodynamics: Aerodynamics

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Type
Papers
Information
Journal of Fluid Mechanics , Volume 759 , 25 November 2014 , pp. 56 - 72
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© 2014 Cambridge University Press 

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