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

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

2004-08-03

arxiv.org/abs/astro-ph/0408062v2

Physical Review E 71 (2005), 036302 (1-11)

Astronomy and Astrophysics

Astrophysics

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

Scientific paper

10.1103/PhysRevE.71.036302

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.

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