期刊
PHYSICAL REVIEW LETTERS
卷 125, 期 21, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.125.214501
关键词
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资金
- European Research Council (ERC) under the European Union [678634]
- Netherlands Organisation for Scientific Research (NWO) [15462, 16467, 2019.005]
- European Research Council (ERC) [678634] Funding Source: European Research Council (ERC)
We perform direct numerical simulations of rotating Rayleigh-Benard convection (RRBC) of fluids with low (Pr = 0.1) and high (Pr approximate to 5) Prandtl numbers in a horizontally periodic layer with no-slip bottom and top boundaries. No-slip boundaries are known to actively promote the formation of plumelike vertical disturbances, through so-called Ekman pumping, that control the ambient flow at sufficiently high rotation rates. At both Prandtl numbers, we demonstrate the presence of competing large-scale vortices (LSVs) in the bulk. Strong buoyant forcing and rotation foster the quasi-two-dimensional turbulent state of the flow that leads to the upscale transfer of kinetic energy that forms the domain-filling LSV condensate. The Ekman plumes from the boundary layers are sheared apart by the large-scale flow, yet we find that their energy feeds the upscale transfer. Our results of RRBC simulations substantiate the emergence of large-scale flows in nature regardless of the specific details of the boundary conditions.
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