Flow regimes of Rayleigh–Bénard convection in a vertical magnetic field

Flow regimes of Rayleigh–Bénard convection in a vertical magnetic field
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垂直磁场中瑞利贝纳德对流的流态

DOI:
10.1017/jfm.2020.264
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发表时间:
2020
影响因子:
3.7
通讯作者:
J. Schumacher
J. Schumacher
中科院分区:
工程技术2区
文献类型:
--
作者:
T. Zürner;F. Schindler;T. Vogt;S. Eckert;J. Schumacher

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研究了垂直静磁场对液态金属瑞利-巴姆纳德对流中动量和热量整体输运性质的影响。实验是在一个长径比为一的圆柱形对流池中进行的,在低普朗特数下填充合金GaInSn,只留下近壁对流流,甚至低于钱德拉塞卡线性不稳定阈值。因此,我们的研究从实验上证明了受限磁对流中壁模的存在。在很大的哈特曼数范围内,流体动量的稳定下降几乎不影响传递热量的大小。我们将实验全局输运分析扩展到动量传递,并包括雷诺数对哈特曼数的依赖。
The effects of a vertical static magnetic field on the flow structure and global transport properties of momentum and heat in liquid metal Rayleigh–Bénard convection are investigated. Experiments are conducted in a cylindrical convection cell of unity aspect ratio, filled with the alloy GaInSn at a low Prandtl number of leaving only a near-wall convective flow that persists even below Chandrasekhar’s linear instability threshold. Our study thus proves experimentally the existence of wall modes in confined magnetoconvection. The magnitude of the transferred heat remains nearly unaffected by the steady decrease of the fluid momentum over a large range of Hartmann numbers. We extend the experimental global transport analysis to momentum transfer and include the dependence of the Reynolds number on the Hartmann number.
具有垂直磁场的垂直圆柱体中的瑞利-贝纳德不稳定性
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发表时间: 2002
影响因子: 3.7
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