Dresden 2017 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
DY: Fachverband Dynamik und Statistische Physik
DY 16: Focus: Fundamental aspects of turbulent convection
DY 16.1: Hauptvortrag
Dienstag, 21. März 2017, 09:30–10:00, ZEU 118
The Geostrophic Branch of Rotating Convection — •Stephan Stellmach1, Meredith Plumley2, Keith Julien2, and Philippe Marti2 — 1Institut für Geophysik, Westfälische Wilhelms-Universität, Münster, Germany — 2Department of Applied Mathematics, University of Colorado, Boulder, USA
Rotating convective flows are ubiquitous in nature. They generate planetary magnetic fields, cause deep mixing in the Mediterranean Sea and possibly drive the zonal winds observed on Jupiter. Unfortunately, laboratory experiments and direct numerical simulations (DNS) fail to reach a dynamical regime in which the convection is strongly turbulent but still dominated by Coriolis forces on all scales of interest. This so-called geostrophic branch of rotating convection is thought to be relevant in many natural systems. A possible way to explore this regime are simulations based on asymptotically reduced model equations that are expected to hold in the limit of rapid rotation. In this talk, I will discuss the predictive power of these models in detail, with a particular focus on the role of boundary layers, inverse energy cascades and the possibility to numerically simulate flows in parameter regimes beyond what can be reached in laboratory experiments and direct numerical simulations today.