Large-scale Structure in Rayleigh-Bénard Convection with Impenetrable Sidewalls

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• 作者：Kerr ; Robert M. ; Herring ; Jackson R. ; Brandenburg ; Axel
• 刊名：Chaos, Solitons and Fractals
• 出版年：1995
• 出版时间：October, 1995
• 年：1995
• 卷：5
• 期：10
• 页码：2047-2053
• 全文大小：307 K

文摘

In numerical Rayleigh-Bénard convection at Rayleigh number 10⁵ and 5 × 10⁵, Prandtl numbers 0.07, 0.7, and 7, and aspect ratios 3, 4 or 6, large-scale patterns are sought. For aspect ratio 6 and Pr = 0.7, saturation of the mean velocity is only observed after 20 convective timescales. Three-dimensional visualization shows a strong influence of the confining sidewalls and corners for all Prandtl numbers. Sweeping motions are observed for Pr = 7.