Boundary layer control of rotating convection systems

Eric M. King (), Stephan Stellmach, Jerome Noir, Ulrich Hansen and Jonathan M. Aurnou
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Eric M. King: University of California, Los Angeles, California 90095-1567, USA
Stephan Stellmach: Institut für Geophysik, WWU Münster, AG Geodynamik Corrensstrasse 24, Münster 48149, Germany
Jerome Noir: University of California, Los Angeles, California 90095-1567, USA
Ulrich Hansen: Institut für Geophysik, WWU Münster, AG Geodynamik Corrensstrasse 24, Münster 48149, Germany
Jonathan M. Aurnou: University of California, Los Angeles, California 90095-1567, USA

Nature, 2009, vol. 457, issue 7227, 301-304

Abstract: Rotating convection: through thick and thin Turbulent rotating convection is an important dynamical process occurring on nearly all planetary and stellar bodies, influencing many observed features such as magnetic fields, atmospheric jets and emitted heat flux patterns. For decades, it has been thought that the importance of rotation's influence on convection depends on the competition between the two relevant forces in the system: buoyancy (non-rotating) and Coriolis (rotating). The force balance argument does not, however, accurately predict the transition from rotationally controlled to non-rotating heat transfer behaviour. New results from laboratory and numerical experiments suggest that the transition is in fact controlled by the relative thicknesses of the thermal (non-rotating) and Ekman (rotating) boundary layers.

Date: 2009
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DOI: 10.1038/nature07647

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