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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.).
|Journal||Geophysical research letters|
|Publication status||Published - 28 Oct 2021|
- diffusion-free scaling
- rapidly rotating
- spherical shell
- Thermal convection
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- 1 Oral presentation
Diffusion-free scaling in rotating spherical Rayleigh-Bénard convection
Guiquan Wang (Speaker), Luca Santelli (Contributor), Detlef Lohse (Contributor), Roberto Verzicco (Contributor) & Richard J.A.M. Stevens (Contributor)23 Nov 2021
Activity: Talk or presentation › Oral presentation