Rising bubbles in yield stress materials

被引：45

作者：

Lopez, William F. ^{[1
]}

Naccache, Monica F. ^{[1
]}

de Souza Mendes, Paulo R. ^{[1
]}

机构：

[1] Pontificia Univ Catolica Rio de Janeiro, Dept Mech Engn, Rio De Janeiro, Brazil

来源：

JOURNAL OF RHEOLOGY | 2018年 / 62卷 / 01期

关键词：

HERSCHEL-BULKLEY FLUIDS; NON-NEWTONIAN FLUIDS; SINGLE BUBBLE; RISE VELOCITY; TERMINAL VELOCITY; AIR BUBBLES; MOTION; SHAPE; FLOW; DYNAMICS;

D O I：

10.1122/1.4995348

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

We present an experimental investigation of bubbles rising in elasto-viscoplastic media. The effects of medium rheology and bubble size on the bubble velocity and shape are investigated. In addition, a discussion regarding the influence of the stress history on the bubble path is presented. Experimental tests are performed using yield stress materials which also present elastic behavior. Despite the difficulty in determining the relative importance of the different forces that are present in this flow, the results obtained illustrate the effect of yield stress, inertia, elasticity, and buoyancy on the dynamics and shape of the bubble. (C) 2017 The Society of Rheology.

引用

页码：209 / 219

页数：11

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