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Nonlinear spatial evolution of an externally excited instability wave in a free shear layer (1988)

Hultgren, Lennart S. ; Goldstein, M. E.

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Publication Date: 2011-08-19

Description: This paper considers a disturbance evolving from a strictly linear finite-growth-rate instability wave, with nonlinear effects first becoming important in the critical layer. By incorporating viscous effects into the nonlinear critical-layer analysis of Goldstein and Leib (1988), it was possible to demonstrate how an initially linear instability wave evolves as it propagates downstream and how the viscous effects eventually become important, even when the viscosity is very small, due to continually decreasing scales generated by the nonlinear effects.

Keywords: FLUID MECHANICS AND HEAT TRANSFER

Type: Journal of Fluid Mechanics (ISSN 0022-1120); 197; 295-330

Format: text

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