In this dissertation a formulation of the fluid dynamics of convective regions is developed which leads to an analytical description of the solar rotation, the Evershed flow and the supergranulation. The starting point of the present formulation is the mixing length picture of convective equi¬librium, but the earlier point Bass model for convective molecules is In the present work replaced by a model with both inertia end intrinsic moment of inertia. This extension introduces three rotational degrees of freedom into the dynamics of individual convective molecules, which enter into the dynamical equations for a mixing length fluid in the forts of a separate vector field which we term the spies field. It is shown that for convective molecules having a spherically symmetric mass distribution the spin field is proportional to the local vorticity;the proportionality factor 1B tread the spin parameter.
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