会议论文详细信息
Winter School on Continuous Media Mechanics
Instability of cyclonic convective vortex
Sukhanovskii, A.^1 ; Evgrafova, A.^1,2 ; Popova, E.^1
Institute of Continuous Media Mechanics UB RAS, Acad. Korolev St. 1, Perm
614013, Russia^1
Perm State University, Bukireva St. 15, Perm
614990, Russia^2
关键词: Convective vortices;    Critical value;    Cyclonic vortices;    Experimental modeling;    Localized heating;    Moderate value;    Rotational reynolds numbers;    Strong anisotropy;   
Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/208/1/012040/pdf
DOI  :  10.1088/1757-899X/208/1/012040
来源: IOP
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【 摘 要 】

Localized heating in the rotating layer of fluid leads to the formation of intensive cyclonic vortex. Cyclonic vortex becomes unstable at low values of viscosity and fast rotation of the experimental model. The instability of the vortex is tightly connected with a structure of the radial inflow. For moderate values of rotational Reynolds number Re the radial flows consist of several branches which transport angular momentum to the center of the model. When Re exceeds critical value (about 23) radial inflow changes its structure and appears as one wide branch which does not reach the center. As a result of strong anisotropy of radial inflow the cyclonic vortex is formed at some distance from the center. Further increase of Re leads to chaotic state with several vortices which appears at different locations near the periphery of the heating area. The map of regimes with stable and unstable vortices is presented.

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