Physics
Scientific paper
Sep 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jats...46.2716b&link_type=abstract
Journal of Atmospheric Science, Vol. 46, No. 17, p. 2716 - 2729
Physics
6
Rotating Fluids: Instabilities
Scientific paper
Empirical evidence is presented to the effect that amplitude vacillation in a thermally driven rotating annulus of fluid is due primarily to the interference of two modes with the same azimuthal wavenumber and different vertical structures and phase speeds. Higher order details of the amplitude vacillation cycle are attributable to one or two additional modes that are generated by the interaction of the primary pair with the mean zonal flow (i.e., wave-mean flow interactions). Wave-wave interactions appear to play a negligible role in accounting for amplitude vacillations observed in laboratory experiments. Sufficient theoretical evidence is available in the published literature to suggest that the two fundamental modes responsible for amplitude vacillation arise through the destabilization of neutral Eady modes by one or more critical layers in the fluid.
Buzyna G.
Kung Robin
Pfeffer Richard L.
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