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Influence of variations of dissipation and pressure on formation of coherent structures in geophysical media

Authors
Journal
Physics and Chemistry of the Earth
0079-1946
Publisher
Elsevier
Publication Date
Volume
21
Identifiers
DOI: 10.1016/s0079-1946(97)81155-x

Abstract

Abstract In this work containing both reviewed and original results we analyze the behaviour of the Reynolds stress tensor in a helical turbulent medium taking into account: the relation between the direct and inverse transfer of the averaged motion parameters, the effects of higher moments of the turbulent field and helical fluctuations on the turbulent viscosity. We analyze the reasons of the helical structure localization due to: a) the medium inhomogeneity, b) the negative turbulent viscosity, c) the excess of the external pressure of the medium surrounding the region with helical turbulence. A possible structure of the tropical cyclone (TC) is discussed taking into account the helical inhomogeneity. Characteristic properties in the pressure behaviour at the TC origination are revealed and elucidated.

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