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Turbulent transport of angular momentum and differential rotation

 

作者: L.L. Kichatinov,  

 

期刊: Geophysical & Astrophysical Fluid Dynamics  (Taylor Available online 1986)
卷期: Volume 35, issue 1-4  

页码: 93-110

 

ISSN:0309-1929

 

年代: 1986

 

DOI:10.1080/03091928608245888

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

With the help of simplifying approximations, we have derived expressions for the non-diffusive fluxes of the angular momentum which are brought about by the action of Coriolis forces on the convective motion. The original turbulence, which is not perturbed by the Coriolis forces, is considered given and weakly anisotropic, the anisotropy having a preferred radial direction. The eddy viscosities are evaluated. Hence, a closed equation for the angular velocity is derived, and then solved for the case of slow rotation. It is shown that the differential rotation is generated most effectively in the case of moderate rotation when the Rossby number is of order unity. At small Rossby numbers, the rotation differentiality is inhibited. A negative eddy viscosity is suggested for the case of rapid rotation. Some implications for the Sun and other astrophysical objects are discussed.

 

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