Large-scale thermal motions of turbulent Rayleigh-Bénard convection in a wide aspect-ratio cylindrical domain

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• 作者：P.J. Sakievich ; ^{psakievi@asu.edu} ; Y.T. Peet ; R.J. Adrian
• 关键词：Rayleigh-Bé ; nard ; Turbulence ; Thermal convection ; Wide aspect ratio ; Coherent structures
• 刊名：International Journal of Heat and Fluid Flow
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：61
• 期：part_PA
• 页码：183-196
• 全文大小：5030 K
• 卷排序：61

文摘

Turbulent Rayleigh–Bénard convection in a wide cylinder is simulated numerically. We focus on large-scale circulation(s) (LSC) in moderate aspect-ratio domains. The Rayleigh number is 9.6 × 107 and the aspect-ratio (diameter/height) is 6.3. Statistics of the simulation agree well with experiments. A persistent 120° hub-and-spoke pattern and a central updraft dominates the LSC.