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Nonlinear evolution of Rayleigh waves in an initial value context: non-symmetric input and cross-flow

Published online by Cambridge University Press:  26 February 2010

T. Allen ,
S. N. Brown  and
F. T. Smith
T. Allen
Affiliation:
Room 247, Ocean Applications, The Met. Office, London Road, Bracknell, RG12 2SZ
S. N. Brown
Affiliation:
Department of Mathematics, University College London, Gower Street, London, WC1E 6BT
F. T. Smith
Affiliation:
Department of Mathematics, University College London, Gower Street, London, WC1E 6BT
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Abstract

In recent papers the present authors considered the effects of small cross-flow on the evolution of two unequal oblique waves. In these studies the relative size of the crossflow meant that a diffusion (or buffer) layer was required around the critical layer to smooth out the algebraic growth in the mean-flow distortion generated by the nonlinear critical-layer interactions. The present analysis increases the cross-flow to an order of magnitude such that the buffer and critical layers coalesce. In this instance the nonlinear critical layer contains viscous as well as nonequilibrium effects. The resulting amplitude equations are solved for perturbations initiated at a fixed station in the flow.

Type
Research Article
Information
Mathematika , Volume 45 , Issue 2 , December 1998 , pp. 217 - 243
Copyright
Copyright © University College London 1998

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