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Powering a core dynamo with precession or thermo-solutal convection
presentation
posted on 2016-06-03, 12:54 authored by Nathanael SchaefferNathanael Schaeffer, David Cébron, Nicolas Muller, Jérémie VidalWe investigate two phenomena occuring in planetary cores, and that may be related to magnetic field generation.
1) flows driven by precession in spherical shells
2) stability of the double-diffusive system in a rotating spherical shell.
We find that it is difficult to obtain precession dynamos in spheres at low viscosity.
We also highligh the possibility for thermo-solutal convection in case of a sub-adiabatic heat flux at the core-mantle boundary.
1) flows driven by precession in spherical shells
2) stability of the double-diffusive system in a rotating spherical shell.
We find that it is difficult to obtain precession dynamos in spheres at low viscosity.
We also highligh the possibility for thermo-solutal convection in case of a sub-adiabatic heat flux at the core-mantle boundary.
