HR: 0800h
AN: DI31A-0252    [Abstracts]
TI: Heat Transfer Scaling Regime Transitions in Rapidly Rotating Convection
AU: * King, E M
EM: eking0@ucla.edu
AF: University of Califonia, Los Angeles, Department of Earth and Space Sciences University of California, Los Angeles 595 Charles Young Drive East, Box 951567, Los Angeles, CA 90095-1567,
AU: Stellmach, S
EM: stellma@earth.uni-muenster.de
AF: Institut für Geophysik, WWU Münster, AG Geodynamik Corrensstr. 24, Münster, 48149,
AU: Aurnou, J
EM: jona@ess.ucla.edu
AF: University of Califonia, Los Angeles, Department of Earth and Space Sciences University of California, Los Angeles 595 Charles Young Drive East, Box 951567, Los Angeles, CA 90095-1567,
AB: Recent numerical studies suggest the possibility of a unifying heat transfer scaling law in rotating convection, for which Nu ~ Ra^1.22. 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 ~ Ra^2/7). 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 - Ra_c)/Ra_c, spans from 0 to 10⁵. We hypothesize that the transition occurs when strongly supercritical convection isothermalizes the bulk interior of the fluid.
DE: 1213 Earth's interior: dynamics (1507, 7207, 7208, 8115, 8120)
DE: 1507 Core processes (1213, 8115)
DE: 8115 Core processes (1213, 1507)
SC: Study of the Earth's Deep Interior [DI]
MN: 2007 Fall Meeting