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Experiments in Fluids

, Volume 28, Issue 2, pp 128–142 | Cite as

Hydroelastic instabilities in viscoelastic flow past a cylinder confined in a channel

  • A. H. Shiang
  • A. Özkekin
  • J. -C. Lin
  • D. Rockwell

Abstract

Experimental investigation of viscoelastic flow past a cylinder is conducted for a polyisobutylene-based polymer solution. High-image-density particle image velocimetry is utilized to quantitatively determine the spatial features of elastic wake instabilities. The viscoelastic flow bifurcates from steady two-dimensional flow to steady three-dimensional flow for values of the Deborah number (dimensionless flow rate) greater than a critical value. These hydroelastic flow transitions are manifested in the form of three-dimensional cells spaced periodically along the axis of the cylinder. The elastic flow structures do not exist in the Newtonian counterpart of creeping flow past a cylinder.

Keywords

Particle Image Velocimetry Polymer Solution Flow Structure Particle Image Velocimetry 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • A. H. Shiang
    • 1
  • A. Özkekin
    • 1
  • J. -C. Lin
    • 1
  • D. Rockwell
    • 1
  1. 1.Department of Mechanical Engineering and Mechanics Lehigh University Bethlehem, PA 18015, USAUS

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