NDLI: Quasi-static bubble in a yield stress fluid: elasto-plastic model

Content Provider	Springer Nature Link
Author	Samson, Gabriel Phelipot Mardelé, Annabelle Las, Christophe Pierre, Alexandre
Copyright Year	2017
Abstract	The influence of the yield stress of Carbopol® gel dispersions on the behaviour of quasi-static bubbles was investigated. Many fluids, from many different industrial fields, have yield stress behaviour. Most of them contain gas bubbles. To study bubble behaviour in such suspensions, a transparent model fluid (dispersion of Carbopol® in water) was used. The experimental device allowed to quasi-statically increase bubble internal pressure with small pressure step to reach a maximum target internal pressure and the pressure setpoint was inverted to return to the initial pressure. Hysterical behaviour of the bubbles was highlighted as they did not regain their initial shape because of yield stress. We show that the rheological behaviour is related to the internal pressure, bubble geometry and yield stress in quasi-static conditions. A modification of the Laplace law depending on the yield stress of the fluid and bubble sphericity was proposed and validated.
Starting Page	431
Ending Page	443
Page Count	13
File Format	PDF
ISSN	00354511
Journal	Rheologica Acta
Volume Number	56
Issue Number	5
e-ISSN	14351528
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2017-04-07
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bubble Yield stress fluid Carbopol® Elasto-plastic model Sphericity Characterization and Evaluation of Materials Polymer Sciences Soft and Granular Matter, Complex Fluids and Microfluidics Mechanical Engineering Food Science
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Condensed Matter Physics Materials Science

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