Influence of elastic properties on drop deformation in elongational flow
作者:
F. Mighri,
A. Ajji,
P. J. Carreau,
期刊:
Journal of Rheology
(AIP Available online 1997)
卷期:
Volume 41,
issue 5
页码: 1183-1201
ISSN:0148-6055
年代: 1997
DOI:10.1122/1.550853
出版商: The Society of Rheology
关键词: Droplets;Elongational flow
数据来源: AIP
摘要:
We report experimental results on the deformation of a single drop suspended in a medium under uniaxial elongational flow along the central axis of a converging conical channel made of Plexiglas. Both the drop and the continuous phases consist of constant viscosity elastic fluids, so-called Boger fluids. This study reveals several interesting features about the role played by both the drop and matrix elasticities on the drop deformability. In a given matrix fluid, the drop deformation decreases as its elasticity increases. For a given drop fluid, the matrix elasticity has the opposite effect: the drop deformation increases with increasing matrix elasticity. An empirical relation between the drop and matrix deformations is established as a function of the drop and matrix characteristic elastic times.
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