Viscoelastic secondary flows in serpentine channels

Poole, RJ ORCID: 0000-0001-6686-4301, Lindner, A and Alves, MA (2013) Viscoelastic secondary flows in serpentine channels. JOURNAL OF NON-NEWTONIAN FLUID MECHANICS, 201. pp. 10-16. ISSN 0377-0257, 1873-2631

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Abstract

We report the results of a detailed numerical investigation of inertialess viscoelastic fluid flow through three-dimensional serpentine (or wavy) channels of varying radius of curvature and aspect ratio using the Oldroyd-B model. The results reveal the existence of a secondary flow which is absent for the equivalent Newtonian fluid flow. The secondary flow arises due to the curvature of the geometry and the streamwise first normal-stress differences generated in the flowing fluid and can be thought of as the viscoelastic equivalent of Dean vortices. The effects of radius of curvature, aspect ratio and solvent-to-total viscosity ratio on the strength of the secondary flow are investigated. The secondary flow strength is shown to be a function of a modified Deborah number over a wide parameter range. © 2013 The Authors.

Item Type:	Article
Additional Information:	## TULIP Type: Articles/Papers (Journal) ##
Uncontrolled Keywords:	Finite volume method, Oldroyd-B model, UCM model, Secondary flow, Serpentine channel
Depositing User:	Symplectic Admin
Date Deposited:	12 Apr 2016 11:22
Last Modified:	07 Dec 2024 12:28
DOI:	10.1016/j.jnnfm.2013.07.001
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3000442