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Journal article

The unsteady motion of a sphere in a viscoelastic fluid

By Becker, L.E.1; McKinley, G. H.1; Rasmussen, Henrik K.2; Hassager, Ole2,3

From

Harvard University1

Department of Chemical and Biochemical Engineering, Technical University of Denmark2

The Danish Polymer Centre, Department of Chemical and Biochemical Engineering, Technical University of Denmark3

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

Language: English
Publisher: The Society of Rheology
Year: 1994
Pages: 377-403
ISSN: 15208516 and 01486055
Types: Journal article
DOI: 10.1122/1.550519
ORCIDs: Rasmussen, Henrik K. and Hassager, Ole
Keywords

CREEPING FLOW DRAG ELASTICITY Numerical modelling Polymer Process

Other keywords

ACCELERATION FINITE ELEMENT METHOD ISOBUTYL RADICALS NON−NEWTONIAN FLOW SPHERES TRANSIENTS UNSTEADY FLOW VISCOELASTICITY

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