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Slow flow of a fluid carrying a uniform current past an arbitrarily conducting porous sphere

 

作者: Shanti Swarup,  

 

期刊: Physics of Fluids(00319171)  (AIP Available online 1977)
卷期: Volume 20, issue 11  

页码: 1811-1814

 

ISSN:0031-9171

 

年代: 1977

 

DOI:10.1063/1.861797

 

出版商: AIP

 

数据来源: AIP

 

摘要:

The problem of an arbitrarily conducting porous sphere moving slowly through a current‐carrying, incompressible, and viscous fluid is studied. The effect of permeability on the flow has been studied analytically at low Reynolds number by means of matched asymptotic expansions. The drag force up to order Re is reduced by a factor 1+K/2,Kbeing the permeability associated with the porosity of the sphere. Further, the permeability as well as the current tend to increase the length of eddies behind the porous sphere.

 

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