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Valve effect of inhomogeneities on anisotropic wave propagation

Published online by Cambridge University Press:  29 March 2006

D. J. Acheson
D. J. Acheson
Affiliation:
Geophysical Fluid Dynamics Laboratory, Meteorological Office, Bracknell, Berkshire
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Abstract

A recent investigation of hydromagnetic waves in a rotating fluid has revealed certain ‘valve’-like critical levels associated with each wave which can be effectively penetrated from one side only. This effect is illustrated in the present paper by means of two further examples, namely (a) the propagation of hydromagnetio-gravity waves in a non-uniform magnetic field, and (b) the propagation of internal gravity waves in a wind which, though unidirectional, is both horizontally and vertically sheared.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 58 , Issue 1 , 20 March 1973 , pp. 27 - 37
Copyright
© 1973 Cambridge University Press

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