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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