Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session L34: Geophysical Fluid Dynamics: Rotating Flows
4:05 PM–6:41 PM,
Monday, November 19, 2018
Georgia World Congress Center
Room: B406
Chair: Philip Marcus, University of California, Berkeley
Abstract ID: BAPS.2018.DFD.L34.3
Abstract: L34.00003 : Heat transfer characterization of extreme rotating convection regimes in TROCONVEX*
4:31 PM–4:44 PM
Presenter:
Jonathan S Cheng
(Eindhoven Univ of Tech)
Authors:
Jonathan S Cheng
(Eindhoven Univ of Tech)
Matteo Madonia
(Eindhoven Univ of Tech)
Andres Aguirre Guzman
(Eindhoven Univ of Tech)
Rudie Kunnen
(Eindhoven Univ of Tech)
Many geophysical and astrophysical flows are driven by buoyant instabilities and heavily influenced by rotation. In lieu of the complexity of such systems, rotating Rayleigh-Bénard convection (RRBC) provides a simplified, canonical framework for understanding these flows. To date, however, laboratory experiments and numerical simulations cannot fully access the most geophysically-relevant regimes of rotating convection, which only emerge at extreme values of the governing parameters. Here we present a suite of heat transfer results from TROCONVEX, a new 4-meter-high rotating convection device capable of reaching Ekman numbers as low as 5x10-9 and Rayleigh numbers as high as 1014 – both nearly an order of magnitude more extreme than previously achievable. We show that vertical temperature profiles are consistent with asymptotically-reduced RRBC results, and clearly reflect flow regime transitions. In addition, thermal measurements hint at the existence of novel flow structures in regimes beyond the scope of asymptotic simulations.
*This project is funded by the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (grant agreement no 678634).
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.L34.3
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