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Session: Geophysical and astrophysical turbulence 1
Session starts: Thursday 27 August, 10:30
Presentation starts: 10:30
Room: Room C

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Rodolfo Ostilla-Mónico (University of Twente)
Erwin van der Poel (University of Twente)
Rudie Kunnen (Eindhoven University of Technology)
Roberto Verzicco (University of Rome "Tor Vergata")
Detlef Lohse (University of Twente)

Abstract:
We conduct computations of rotating Rayleigh-Bénard convection in the so-called geostrophic regime, characterized by strong thermal forcing (high Rayleigh numbers) and strong rotation (small Ekman numbers). We employ the full Navier-Stokes equations in our computations and compare no-slip and stress-free boundaries for the plates. The Ekman boundary layers, that exist in the no-slip case but not for stress-free, enhance convective heat transfer and prevent the formation of large-scale flow structures.