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The average rotation rate of a fiber in the linear flow of a semidilute suspension

 

作者: Donald L. Koch,   Eric S. G. Shaqfeh,  

 

期刊: Physics of Fluids A  (AIP Available online 1990)
卷期: Volume 2, issue 12  

页码: 2093-2102

 

ISSN:0899-8213

 

年代: 1990

 

DOI:10.1063/1.857795

 

出版商: AIP

 

数据来源: AIP

 

摘要:

Shaqfeh and Fredrickson [Phys. Fluids A2, 7 (1990)] renormalized the multiple reflection expansion for hydrodynamic fiber interactions in a semidilute suspension,nl3≫1 and &fgr;≪1, where &fgr; is the fiber volume fraction,nis the number of fibers per unit volume, andlis the fiber half‐length. We use the results of Shaqfeh and Fredrickson to obtain the average rotation rate of a fiber in linear shear flows of a semidilute suspension. Specific results are obtained for the case where most of the fibers are oriented in a preferred direction, as occurs in simple shear and extensional flows. The correction to theO(&ggr;˚) Jeffrey rotation rate [Proc. R. Soc. London Ser. A102, 161 (1922); J. Fluid Mech.14, 284 (1962)] due to hydrodynamic interactions is shown to beO[&ggr;˚/ln(1/&fgr;)], where &ggr;˚ is the shear rate.

 

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