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Generation of instability waves in flows separating from smooth surfaces (1984)

Goldstein, M. E.

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Publication Date: 2011-08-19

Description: This paper analyses the coupling between an imposed disturbance and an instability wave that propagates downstream on a shear layer which emanates from a separation point on a smooth surface. Since the wavelengths of the most-amplified instability waves will generally be small compared with the streamwise body dimensions, the analysis is restricted to this 'high-frequency' limit and the solution is obtained by using matched asymptotic expansions. An 'inner' solution, valid near the separation point, is matched onto an outer solution, which represents an instability wave on a slowly diverging mean flow. The analysis relates the amplitude of this instability to that of the imposed disturbance.

Keywords: AERODYNAMICS

Type: Journal of Fluid Mechanics (ISSN 0022-1120); 145; 71-94

Format: text

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