The unsteady motion of a sphere in a viscoelastic fluid

L.E. Becker, G. H. McKinley, Henrik K. Rasmussen, Ole Hassager

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The motion of a sphere accelerating from rest along the center line of a cylindrical tube filled with a polyisobutylene (PIB) Boger fluid is examined both experimentally, using a digital imaging system, and numerically via a Lagrangian finite element method for single and multimode Oldroyd models including inertia. Spheres of diameter 2.54 cm and varying densities are released in a tube radius 5.23 cm. Deborah numbers in the range 0.4
Original languageEnglish
JournalJournal of Rheology
Issue number2
Pages (from-to)377-403
Publication statusPublished - 1994

Bibliographical note

Copyright (1994) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics


  • DRAG
  • Polymer Process
  • Numerical modelling

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