Fig. 3: Vorticity and temperature of cyclones and anticyclones.
From: Inverse centrifugal effect induced by collective motion of vortices in rotating thermal convection
a The vorticity ratio γω = ∣〈ωa〉/〈ωc〉∣ of the anticyclones to the cyclones as a function of Ra/Rac. Here, 〈...〉 denotes a time average. Filled symbols: experimental data for Γ = 3.8 with Ra = 2.0 × 107 (circles), 3.0 × 107 (up triangles), 6.0 × 107 (squares); and for Γ = 2.0 with Ra = 1.4 × 108 (diamonds), 2.7 × 108 (left triangles). Data from DNS including (excluding) the centrifugal force are shown in open diamonds (pluses) for Γ = 4.0. The solid curve indicates the trend of the experimental data. The error bars denote representative fluctuation amplitude of γω. Inset panels: iso-surfaces of the temperature anomaly from DNS for Ra = 2.0 × 107, Ra/Rac = 2.26 (left), and Ra/Rac = 18.3 (right). The coloration represents the vorticity of the vortices. b Radial profiles of the mean temperature 〈T − Tm〉/ΔT for the vortices and the background fluid. Tm is the mean of the top and bottom fluid temperature. The length of the dashed lines indicates the temperature difference δT between the cyclones (anticyclones) and the background fluid. c Radial profiles of γω and γT = ∣〈δTa〉/〈δTc〉∣. b, c DNS data for Ra = 2.0 × 107 and Ra/Rac = 2.26.
