Regensburg 2013 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 29: Focus Session: Rayleigh Benard System and Convective Turbulence

DY 29.1: Hauptvortrag

Donnerstag, 14. März 2013, 15:00–15:30, H44

Transitions in rotating Rayleigh-Benard convection at high Rayleigh numbers — •Andreas Tilgner — Institute of Geophysics, University of Göttingen

In geo- and astrophysics, convective flows are mostly studied in rotating frames of reference and are subject to the Coriolis force. Depending on the control parameters, the flow is either well approximated as non-rotating convection, familiar from numerous simulations and experiments, or it is in a rather less well understood regime in which the flow structures and the turbulence are organized by the global rotation of the frame of reference. The question immediately arises at which parameters the transition form rotating to non-rotating flows occurs. This talk will review characteristic features introduced by rotation. Much work has been done on pattern formation in rotating convection near onset. This talk will on the contrary focus on disordered and turbulent flows and explain the criteria separating rotating from non-rotating convection at high Rayleigh numbers.