Heat Transfer Scaling Regime Transitions in Rapidly Rotating Convection
Abstract
Recent numerical studies suggest the possibility of a unifying heat transfer scaling law in rotating convection, for which Nu ~ Ra1.22. In a coupled experimental-numerical study of strongly supercritical rotating convective heat transfer, we show the emergence of scaling transitions beyond which the proposed law does not hold, and heat transfer scales more similarly to that found in non-rotating convection (i.e., Nu ~ Ra2/7). The transition is explored in convection ranging from non-rotating to rapidly rotating (E = 10- 6), with Rayleigh numbers ranging from 103 to 109, such that the degree of supercriticality, (Ra - Rac)/Rac, spans from 0 to 105. We hypothesize that the transition occurs when strongly supercritical convection isothermalizes the bulk interior of the fluid.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2007
- Bibcode:
- 2007AGUFMDI31A0252K
- Keywords:
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- 1213 Earth's interior: dynamics (1507;
- 7207;
- 7208;
- 8115;
- 8120);
- 1507 Core processes (1213;
- 8115);
- 8115 Core processes (1213;
- 1507)