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Exit region central source flow between finite closely spaced parallel co‐rotating disks

 

作者: D. B. Bogy,   J. E. Fromm,   F. E. Talke,  

 

期刊: Physics of Fluids(00319171)  (AIP Available online 1977)
卷期: Volume 20, issue 2  

页码: 176-186

 

ISSN:0031-9171

 

年代: 1977

 

DOI:10.1063/1.861853

 

出版商: AIP

 

数据来源: AIP

 

摘要:

Laminar source flow between co‐rotating disks can often be adequately described by boundary layer equations. However, when the disk spacing and rotation speed are large (small Ekman number) and the source strength is small (small Rossby number), recirculation occurs near the edges of the disks and the boundary layer equations cannot correctly describe the flow there. The flow is studied in the vicinity of the disk edges for swirl Reynolds number of order 106using approximate equations that are valid in a small region far from the rotation center. Numerical solutions are obtained by finite differences for three values of the Ekman numberEand several values of the Rossby number &egr;. The Ekman numbers chosen give flows between the disks characterized by linearized theory, boundary layer theory, and rotating flow theory with Ekman layers.

 

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