Excitation of large-scale inertial waves in a rotating inhomogeneous turbulence

Abstract

A mechanism of excitation of the large-scale inertial waves in a rotating inhomogeneous turbulence due to an excitation of a large-scale instability is found. This instability is caused by a combined effect of the inhomogeneity of the turbulence and the uniform mean rotation. The source of the large-scale instability is the energy of the small-scale turbulence. We determined the range of parameters at which the large-scale instability occurs, the growth rate of the instability and the frequency of the generated large-scale inertial waves. Geophysical and astrophysical applications of the obtained results are discussed.

arXiv comment11 pages, 6 figures, REVTEX4, revised version, submitted to Phys. Rev. E

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Cited by in corpus (6)

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• Competition of rotation and stratification in flux concentrations
• Effect of heat flux on differential rotation in turbulent convection
• Mixing at the external boundary of a submerged turbulent jet
• Large-scale clustering of inertial particles in a rotating, stratified and inhomogeneous turbulence
• Generation of a large-scale vorticity in a fast rotating density stratified turbulence or turbulent convection