Negative viscosity for Rossby wave and drift wave turbulence |
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Authors: | A V Chechkin M I Kopp V V Yanovsky A V Tur |
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Institution: | (1) Institute for Single Crystals Acad. Sci. Ukraine, 310001 Kharkov, Ukraine;(2) Laboratoire d’Energetique et de Mecanique Theorique et Appliquee, CNRS-URA 875, 2, Avenue de la Foret de Haye-B.P., 160 54504 Vandoeuvre les Nancy Cedex-, France |
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Abstract: | The possible occurrence of a “negative viscosity effect” is studied for Rossby wave and drift wave turbulence. It is assumed
that (i) the space and time scales of the wave field are much smaller than the scales of the mean field, and (ii) the small-scale
field is sufficiently weak, stationary, and maintained by an external source. Such a formulation is fruitful for studying
the effects (characterized by the effective viscosity) of smaller-scale motions upon larger-scale ones. The criteria of large-scale
instability due to the negative effective viscosity are derived for the coherent wave motions as well as for small-scale isotropic
wave turbulence.
Zh. éksp. Teor. Fiz. 113, 646–663 (February 1998)
Published in English in the original Russian journal. Reproduced here with stylistic changes by the Translation Editor. |
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