The numerical simulation of some contraction flows of highly elastic liquids and their impact on the relevance of the Couette correction in extensional rheology

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K Walters, M.F Webster, H.R. Tamaddon Jahromi, Michael Webster

, Hamid Tamaddon-Jahromi

Chemical Engineering Science, Volume: 64, Pages: 4632 - 4639

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DOI (Published version): 10.1016/j.ces.2009.01.007

Published in:	Chemical Engineering Science
Published:	2009
URI:	https://cronfa.swan.ac.uk/Record/cronfa6168
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Item Description:	This pioneering well-cited research addresses the grand-challenge problem facing computational rheology, of deriving a constitutive model to describe quantitatively-observed pressure-drops in contraction-flows. Here, constant shear-viscosity, strain-hardening Boger-type fluids have revealed the counter-influences on pressure-drop enhancement of first-normal stress-differences and extensional viscosity. Key breakthroughs are presented with Oldroyd-based predictions, involving front-line research into Personal-Care-Products (shampoos, £122k+ funding), resulting in major advance towards unifying theory and experiment. The insights provided are resulting in tangible manufacturing productivity and reliability improvements on targeted industrial applications in this area, such as filling and emptying, worth more than $10 million pa to collaborators, Procter & Gamble.
College:	Faculty of Science and Engineering
Start Page:	4632
End Page:	4639