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Effects of bubble deformation on the viscosity of dilute suspensions

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Bibliographic Details
Title:	Effects of bubble deformation on the viscosity of dilute suspensions
Authors:	Rust, A.C.¹, Manga, Michael² manga@seismo.berkeley.edu
Source:	Journal of Non-Newtonian Fluid Mechanics. Apr2002, Vol. 104 Issue 1, p53. 11p.
Subjects:	Rheology, Viscosity
Abstract:	The relative viscosity (μrel=suspension viscosity/suspending fluid viscosity) of low Reynolds number, dilute and surfactant-free bubble suspensions in simple shear is studied with a rotating cylinder, Couette rheometer. The conditions of the experiments correspond to capillary numbers (Ca) of order 1 and bridge previous experimental, theoretical and numerical results that focused on either Ca≪1 or Ca≫1. The suspensions are shear thinning with μrel>1 for small Ca. At large Ca, μrel approaches a constant that is less than 1. These results are explained by a scaling analysis that considers how regions of viscous dissipation in and around bubbles change as bubbles are deformed by the flow. [Copyright &y& Elsevier]
	Copyright of Journal of Non-Newtonian Fluid Mechanics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database:	Engineering Source

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