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An experimental investigation of the intrinsic convection in a sedimenting suspension

 

作者: Yannick Peysson,   E´lisabeth Guazzelli,  

 

期刊: Physics of Fluids  (AIP Available online 1998)
卷期: Volume 10, issue 1  

页码: 44-54

 

ISSN:1070-6631

 

年代: 1998

 

DOI:10.1063/1.869548

 

出版商: AIP

 

数据来源: AIP

 

摘要:

The sedimentation of spheres in a Newtonian fluid is experimentally studied under creeping flow conditions. The mean particle settling velocity and the particle velocity fluctuations are measured across the width of the sedimentation cell. We show that there can be a global intrinsic convection of the suspension superimposed on the settling motion of the particles. Unlike the predictions of the dilute theories of intrinsic convection, this effect is found to be small and even to disappear with increasing concentrations. We also find that there is an ordering of the suspension near the wall, which may be responsible for the observed small magnitude of the convection. ©1998 American Institute of Physics.

 

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