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Particle-Based Modeling of Asymmetric Flexible Fibers in Viscous Flows

Part of: Basic methods in fluid mechanics Numerical methods Incompressible viscous fluids

Published online by Cambridge University Press:  28 July 2017

Xiufeng Yang  and
Moubin Liu
Xiufeng Yang*
Affiliation:
Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China Department of Mechanical Engineering, Iowa State University, Ames, IA 50011, USA
Moubin Liu*
Affiliation:
BIC-ESAT, College of Engineering, Peking University, Beijing 100187, China State Key Laboratory for Turbulence and Complex Systems, Peking University, Beijing 100871, China
*
*Corresponding author. Email addresses:xyang@iastate.edu (X. F. Yang), mbliu@pku.edu.cn (M. B. Liu)
*Corresponding author. Email addresses:xyang@iastate.edu (X. F. Yang), mbliu@pku.edu.cn (M. B. Liu)
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Abstract

The present paper follows our previous work [Yang et al., Phys. Rev. E, 90 (2014), 063011] in which the bending modes of a symmetric flexible fiber in viscous flows were studied by using a coupling approach of smoothed particle hydrodynamics (SPH) and element bending group (EBG). It was shown that a symmetric flexible fiber can undergo four different bending modes including stable U-shape, slight swing, violent flapping and stable closure modes. For an asymmetric flexible fiber, the bending modes can be different. This paper numerically studies the fiber shape, flow field and fluid drag of an asymmetric flexible fiber immersed in a viscous fluid flow by using the SPH-EBG coupling method. An asymmetric number is defined to describe the asymmetry of a flexible fiber. The effects of the asymmetric number on the fiber shape, flow field and fluid drag are investigated.

Keywords

Fluid-structure interactionasymmetric flexible fiberdrag forcesmoothed particle hydrodynamics (SPH)element bending group (EBG)

MSC classification

Secondary: 76M28: Particle methods and lattice-gas methods 76D99: None of the above, but in this section 74S99: None of the above, but in this section
Type
Research Article
Information
Communications in Computational Physics , Volume 22 , Issue 4 , October 2017 , pp. 1015 - 1027
Copyright
Copyright © Global-Science Press 2017 

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