Anisotropy of turbulent transport in a convective layer |
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| Authors: | A S Monin N K Rakhmanova A A Ruzmaikin |
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| Institution: | (1) P. P. Shirshov Institute of Oceanology, Academy of Sciences USSR, Moscow, U.S.S.R.;(2) Keldysh Institute of Applied Mathematics, Academy of Sciences USSR, Moscow, U.S.S.R. |
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| Abstract: | An estimate for the anisotropy of the turbulent viscositys is given in a convective layer heated from below and rotating around a vertical axis. In the case of two-dimensional convection,
there is a stationary regime withs⊇2 regardless of the rotation. In the case of three-dimensional convection in a slowly rotating layer (with the Taylor number
equal to 1600), nonstationary turbulent regimes take place withs⊇1.6 forR=2.5×104 (R is the Rayleigh number) ands⊇1.2 forR=104.
The parameters plays an, important role in the theory of differential rotation of the convective solar or stellar envelopes. So far, it
has been evaluated empirically or semi-empirically. Some prospects in the development of the theory of differential rotation
are discussed here in terms of the moment theory of hydrodynamic fields. The relation between this strict approach and an
anisotropic viscosity approximation is considered. |
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