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Extensional viscosity: A critical discussion

Lookup NU author(s): Emeritus Professor Chris Petrie

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Abstract

The issue of whether extensional viscosity is a concept that causes more confusion than enlightenment is addressed. This author's view is that misuse of the concept certainly has caused much confusion and, although it is in principle a simple and straightforward idea, it continues to be misused. What is straightforward is the formal definition of extensional viscosity, for steady uniform extensional flow. What gives rise to confusion is the careless use of measurements in flows which are not both steady and spatially uniform. © 2006 Elsevier B.V. All rights reserved.


Publication metadata

Author(s): Petrie CJS

Publication type: Article

Publication status: Published

Journal: Journal of Non-Newtonian Fluid Mechanics

Year: 2006

Volume: 137

Issue: 1-3

Pages: 15-23

ISSN (print): 0377-0257

ISSN (electronic): 1873-2631

Publisher: Elsevier BV

URL: http://dx.doi.org/10.1016/j.jnnfm.2006.01.011

DOI: 10.1016/j.jnnfm.2006.01.011


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