Abstract

The complicated processes occurring in a rotating magnetized medium are examined by representing all the vector quantities in the form of expansions in a complete system of orthogonal vector spherical harmonics. A separation of variables is ultimately achieved without a loss of accuracy despite the presence of nonlinear forces (the magnetic and Coriolis forces). The distribution of the rates of rotation and circulation motions in an adiabatically stratified, slowly rotating star or an atmospheric convection zone is studied as an example. The postulate of minimum entropy production from nonequilibrium thermodynamics is employed to find the most probable steady-state configuration. One solution satisfactorily describes the differential rotation observed on the Sun. The preliminary data support the notion that the superfast rotation of the type observed in Venus’ atmosphere can also be explained within the theory discussed.

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