volume 13, issue S337, P336-337 2017
DOI: 10.1017/s1743921317008286
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Ferran Garcia, Frank R. N. Chambers, Anna L. Watts

Abstract: This study considers the onset of stress-free Boussinesq thermal convection in rotating spherical shells with aspect ratio η = ri/ro = 0.9 (ri and ro being the inner and outer radius), Prandtl numbers Pr ∈ [10 −4 , 10 −1 ], and Taylor numbers Ta ∈ [10 4 , 10 12 ]. We are particularly interested in the form of the convective cell pattern that develops, and in its time scales, since this may have observational consequences. For a fixed Ta < 10 9 and by decreasing Pr from 0.1 to 10 −4 a transition between spiral…

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