Rotation of a sphere in a viscoelastic fluid under flow

F. Snijkers, G. D`Avino, P.L. Maffettone, F. Greco, M.A. Hulsen, J. Vermant

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Abstract

The rotation speed of spherical particles in a shear flow is studied experimentally in rheologically different fluids. The fluids, selected to highlight specific constitutive features, include a Newtonian fiuid, a Boger fluid, a wormhke micellar surfactant solution, and a shear thinning elastic polymer solution. It is shown experimentally that particle rotation slows down, when compared to the Newtonian case, as elasticity increases. This is in qualitative agreement with TFEM simulation studies. Furthermore, the dimensionless rotation speed of the spheres in the different fluids as function of the elasticity of the medium scales onto a single curve. This scaling with the Weissenberg number was somewhat unexpected given simulation results for different rheological models, where significant differences are observed for selected single relaxation time differential models.
Original languageEnglish
Title of host publicationThe XVTH International Congress on Rheology : The Society of Rheology 80th Annual Meeting, Monterey, California, 3 - 8 August 2008
EditorsA. Co, G Leal, R. Colby, A.J. Giacomin
Place of PublicationWoodbury
PublisherAIP Press
Pages647-649
ISBN (Print)978-0-7354-0549-3
DOIs
Publication statusPublished - 2008
EventXVth International Congress on Rheology - Monterey, CA, United States
Duration: 3 Aug 20088 Aug 2008

Publication series

NameAIP Conference Proceedings
Volume1027

Conference

ConferenceXVth International Congress on Rheology
Country/TerritoryUnited States
CityMonterey, CA
Period3/08/088/08/08

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