Geostrophic convective turbulence: the effect of boundary layers etc15 Tracking Number 17Presentation: Session: Geophysical and astrophysical turbulence 1 Room: Room C Session start: 10:30 Thu 27 Aug 2015 Rodolfo Ostilla-Mónico r.ostillamonico@utwente.nl Affifliation: University of Twente Erwin van der Poel e.p.vanderpoel@utwente.nl Affifliation: University of Twente Rudie Kunnen r.p.j.kunnen@tue.nl Affifliation: Eindhoven University of Technology Roberto Verzicco verzicco@uniroma2.it Affifliation: University of Rome "Tor Vergata" Detlef Lohse d.lohse@utwente.nl Affifliation: University of Twente Topics: - Geophysical and astrophysical turbulence 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. |