COMMUNICATIONS / MITTEILUNGEN

I.K. Csada

On the Stationary and Periodical Motions in the Atmosphere of the Sun

No. 19
Budapest, 1948

Abstract

The present paper applies the turbulence-theory to the stationary and periodical motions in the atmosphere of the sun. In the introductory passage the author has summarized the problems of thermodynamical and mechanical instability connected with the 11 years' period of the solar activity and with the granular structure of the photosphere. The second part contains Taylor-Prandtl's equations of the turbulent motions. The third part contains a model relating to large-scale currents in the photosphere; from this the coefficient of exchange (i. e. eddy diffusivity) characteristic of the turbulent state may be calculated on the one hand, and conclusions relating to the periodical changes in the distribution of angular velocity may be drawn on the other hand. The period is approximately equal to the period of solar activity.

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