For rapidly rotating turbulent Rayleigh–Bénard convection in a slender cylindrical cell, experiments and direct numerical simulations reveal a boundary zonal flow (BZF) that replaces the classical large-scale circulation. The BZF is located near the vertical side wall and enables enhanced heat transport there. Although the azimuthal velocity of the BZF is cyclonic (in the rotating frame), the temperature is an anticyclonic traveling wave of mode one, whose signature is a bimodal temperature distribution near the radial boundary. The BZF width is found to scale like Ra1/4Ek2/3 where the Ekman number Ek decreases with increasing rotation rate.
Bibliographical notePublished by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Open access publication funded by the Max Planck Society.
FunderDeutsche Forschungsgemeinschaft (DFG) through the Collaborative Research Centre Grant No. SFB 963 "Astrophysical Flow Instabilities and Turbulence" and research Grants No. Sh405/4-1, No. Sh405/4-2, No. Sh405/8-1, No. Ho5890/1-1, and No. We5011/3-1, from the LDRD program at Los Alamos National Laboratory and by the Leibniz Supercomputing Centre (LRZ).
ASJC Scopus subject areas
- Physics and Astronomy(all)