Instability of reaction zone at the core-mantle boundary (CMB)

Details Instability of reaction zone at the core-mantle boundary (CMB) Instability of reaction zone at the core-mantle boundary (CMB)

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994em%26p...64..281f&link_type=abstract

Earth, Moon, and Planets (ISSN 0167-9295), vol. 64, no. 3, p. 281-291

Physics

Geophysics

1

Chemical Reactions, Diffusion, Dispersing, Earth Core, Earth Gravitation, Earth Mantle, Earth Planetary Structure, Geophysics, Infiltration, Liquid-Solid Interfaces, Reaction Products, Coefficients, Crystals, Gravitational Effects, Iron Alloys, Laplace Equation, Mathematical Models, Silicates, Spherical Harmonics, Stability, Topography

Scientific paper

The core-mantle reaction proceeds on two scales: the short-scale chemical reaction leading to local equilibrium and the large-scale dispersal of reaction products. The second process is connected with a growth of the core-mantle boundary (CMB)-radius and may be described with application of the diffusion equation. The departure from a stationary interface is calculated using the gravitational body force as the mechanism controlling the 'tension' of the distorted spherical core body. Stability analysis with the help of angular harmonics leads to the result that undulations of CMB are stable for very long wave lengths only.

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