Viscous friction in foams and concentrated emulsions under steady shear

被引：90
|
作者：
Denkov, N. D. [1 ]
Tcholakova, S. [1 ]
Golemanov, K. [1 ]
Ananthapadmanabhan, K. P. [2 ]
Lips, A. [2 ]
机构：
[1] Univ Sofia, Fac Chem, Lab Chem Phys & Engn, Sofia, Bulgaria
[2] Unilever Global Res Ctr, Trumbull, CT 06611 USA
来源：
PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 13期
关键词：
D O I：
10.1103/PhysRevLett.100.138301
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present a model for the viscous friction in foams and concentrated emulsions, subject to steady shear flow. First, we calculate the energy dissipated due to viscous friction inside the films between two neighboring bubbles or drops, which slide along each other in the flow. Next, from this energy we calculate the macroscopic viscous stress of the sheared foam or emulsion. The model predictions agree well with experimental results obtained with foams and emulsions.
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页数：4
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