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24 April 2024

» arxiv » 1906.1325

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Asymmetric vorticity distribution induces anomalous vortex motion in rapidly rotating thermal convection
Shan-Shan Ding ; Kai Leong Chong ; Jun-Qiang Shi ; Guang-Yu Ding ; Hao-Yuan Lu ; Ke-Qing Xia ; Jin-Qiang Zhong ;
Date:	4 Jun 2019
Abstract:	In rotating Rayleigh-B’enard convection, columnar vortices advect horizontally in a stochastic manner. When the centrifugal buoyancy is present the vortices exhibit radial motions that can be explained through a Langevin-type stochastic model. In a centrifugation-dominant flow regime anomalous outward motion of cyclones is observed which is contrary to the well-known centrifugal effect. We interpret this phenomenon as a symmetry-breaking of the vorticity distribution brought about by the centrifugal buoyancy. Consequently, the cyclones submit to a collective mode of vortex motion dominated by the strong anticyclones. Our studies provide new understanding of vortices motions that are widely present in many natural systems.
Source:	arXiv, 1906.1325
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