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Axially symmetric boundary layers on a finite disk

 

作者: M. I. G. Bloor,   D. B. Ingham,  

 

期刊: Physics of Fluids(00319171)  (AIP Available online 1977)
卷期: Volume 20, issue 8  

页码: 1228-1233

 

ISSN:0031-9171

 

年代: 1977

 

DOI:10.1063/1.862003

 

出版商: AIP

 

数据来源: AIP

 

摘要:

A numerical calculation of the steady flow in a laminar boundary layer on a fixed circular disk of finite size induced by some external axially symmetric motion is presented. The flow external to the boundary layer consists of a potential vortex which is coincident with the axis of the disk and an inward radial motion proportional to a power of the distance from the axis,r−m. Integration of the boundary layer equations is carried out starting at the edge of the disk and proceeding inward until a terminal solution is obtained. A numerical technique is employed which allows a solution to be obtained very near the center despite the extreme thickness of the boundary layer. A surprising result is the apparent lack of dependence of the terminal solution on either the conditions at the edge of the disk or the value ofmform<1. The limiting case when the spin vanishes is also calculated and the results support the view of Brown and Stewartson that algebraic decay can exist at a singular point in the boundary layer.

 

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