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Onset of thermal convection at low Ekman and Prandtl numbers by an hybrid approach

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If you have a question about this talk, please contact Jean Teyssandier .

We computed thermal convection in a rapidly rotating sphere generated by internal heating. For low Ekman and low Prandtl, two dynamical branches are present; a weakly non linear branch connected to the onset (quite well documented) and an new upper branch with larger value of convective velocities and different scaling laws. For extreme regimes, the upper branch becomes subcritical.

This talk is part of the DAMTP Astrophysics Seminars series.

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