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Unsteady flow at a stagnation point

Published online by Cambridge University Press:  26 April 2006

N. Riley
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Abstract

The flow at an axisymmetric stagnation point is considered when the outer, inviscid flow is oscillatory with zero mean. It is shown that following the commencement of the flow at an initial instant there is a breakdown of the solution, after a finite time, as fluid erupts from the boundary at the stagnation point. This is interpreted as the origin of the jet-like flow observed in the experiments of Amin & Riley (1990). It is demonstrated that an in-plane, torsional motion of the boundary, either steady or oscillatory, can suppress the singular behaviour.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 256 , November 1993 , pp. 487 - 498
Copyright
© 1993 Cambridge University Press

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References

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