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.
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Received: 7 October 1998 / Accepted: 22 April 1999
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Shiang, A., Özkekin, A., Lin, JC. et al. Hydroelastic instabilities in viscoelastic flow past a cylinder confined in a channel. Experiments in Fluids 28, 128–142 (2000). https://doi.org/10.1007/s003480050017
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DOI: https://doi.org/10.1007/s003480050017