Heat convection and phase separation of materials in planets

Details Heat convection and phase separation of materials in planets Heat convection and phase separation of materials in planets

Sep 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975avest...9..152k&link_type=abstract

Astronomicheskii Vestnik, vol. 9, July-Sept. 1975, p. 152-161. In Russian.

Astronomy and Astrophysics

Astronomy

1

Binary Systems (Materials), Convective Heat Transfer, Earth Planetary Structure, Phase Separation (Materials), Planetary Composition, Planetary Evolution, Earth Crust, Liquid Phases, Solid Phases, Surface Cooling, Terradynamics

Scientific paper

Cooling of molten planets and the dynamics of the molten layer in a two-component mixture are examined using a simplified model of convective heat exchange. Basic thermodynamic relationships are derived for multicomponent mixtures. It is shown that convection in a liquid medium has a decisive role in heat removal, that a solid outer shell will be formed as a result of this, and that the temperature gradient in the liquid phase will diminish rapidly. Analysis of molten-layer dynamics indicates that the layer itself will play the part of a component separator, although its existence over a long period of time is unlikely in the absence of intense heat sources.

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