Direct numerical simulations are employed to reveal three distinctly different flow regions in rotating spherical Rayleigh-Bénard convection. In the high-latitude region (Formula presented.) vertical (parallel to the axis of rotation) convective columns are generated between the hot inner and the cold outer sphere. The mid-latitude region (Formula presented.) is dominated by vertically aligned convective columns formed between the Northern and Southern hemispheres of the outer sphere. The diffusion-free scaling, which indicates bulk-dominated convection, originates from this mid-latitude region. In the equator region (Formula presented.), the vortices are affected by the outer spherical boundary and are much shorter than in region (Formula presented.).
Diffusion-Free Scaling in Rotating Spherical Rayleigh-Bénard Convection
Santelli L.
;
2021
Abstract
Direct numerical simulations are employed to reveal three distinctly different flow regions in rotating spherical Rayleigh-Bénard convection. In the high-latitude region (Formula presented.) vertical (parallel to the axis of rotation) convective columns are generated between the hot inner and the cold outer sphere. The mid-latitude region (Formula presented.) is dominated by vertically aligned convective columns formed between the Northern and Southern hemispheres of the outer sphere. The diffusion-free scaling, which indicates bulk-dominated convection, originates from this mid-latitude region. In the equator region (Formula presented.), the vortices are affected by the outer spherical boundary and are much shorter than in region (Formula presented.).File | Dimensione | Formato | |
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Geophysical Research Letters - 2021 - Wang - Diffusion%E2%80%90Free Scaling in Rotating Spherical Rayleigh%E2%80%90B nard Convection.pdf
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