title: Generation of Large-Scale Winds in Horizontally Anisotropic Convection.
abstract: We simulate three-dimensional, horizontally periodic Rayleigh-Bénard convection, confined between free-slip horizontal plates and rotating about a distant horizontal axis. When both the temperature difference between the plates and the rotation rate are sufficiently large, a strong horizontal wind is generated that is perpendicular to both the rotation vector and the gravity vector. The wind is turbulent, large-scale, and vertically sheared. Horizontal anisotropy, engendered here by rotation, appears necessary for such wind generation. Most of the kinetic energy of the flow resides in the wind, and the vertical turbulent heat flux is much lower on average than when there is no wind.
authors.affiliation: Institute of Atmospheric Sciences, National Research Council, Torino 10133, Italy.
authors.forename: J
authors.initials: J
authors.lastname: von Hardenberg
authors.affiliation: Mathematics Department, University of Michigan, Ann Arbor, Michigan 48109, USA.|Center for the Study of Complex Systems, University of Michigan, Ann Arbor 48109, Michigan, USA.
authors.forename: D
authors.initials: D
authors.lastname: Goluskin
authors.affiliation: Institute of Geosciences and Earth Resources, National Research Council, Pisa 56124, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Provenzale
authors.affiliation: Astronomy Department, Columbia University, New York, New York 10027, USA.
authors.forename: E A
authors.initials: EA
authors.lastname: Spiegel