TY - JOUR
T1 - Boundary Zonal Flow in Rotating Turbulent Rayleigh-Bénard Convection
AU - Zhang, Xuan
AU - Van Gils, Dennis P.M.
AU - Horn, Susanne
AU - Wedi, Marcel
AU - Zwirner, Lukas
AU - Ahlers, Guenter
AU - Ecke, Robert E.
AU - Weiss, Stephan
AU - Bodenschatz, Eberhard
AU - Shishkina, Olga
PY - 2020/2/27
Y1 - 2020/2/27
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85081649085&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.124.084505
DO - 10.1103/PhysRevLett.124.084505
M3 - Article
C2 - 32167333
AN - SCOPUS:85081649085
VL - 124
JO - Physical review letters
JF - Physical review letters
SN - 0031-9007
IS - 8
M1 - 084505
ER -