Low-Temperature Studies of the Rayieigh-Bénard Instability and Turbulence
Low-Temperature Studies of the Rayieigh-Bénard Instability and Turbulence
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瑞利-贝纳德不稳定性和湍流的低温研究
DOI：
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发表时间：
1974
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影响因子：
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通讯作者：
G. Ahlers
中科院分区：
文献类型：
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作者：
G. Ahlers
低温技术被应用于流体动力学不稳定性的研究。对于液态和气态氦，努塞尔数 $N$ 作为瑞利数 $R$ 的函数的高精度结果显示，除了对流阈值 ${R}_{c}$ 之外，$N(R)$ 中没有奇点。对于$Rg2.19{R}_{c}$，通过测量$N(R)$的频谱和振幅发现并表征了一种新的湍流状态。
Low-temperature techniques were applied to the study of a hydrodynamic instability. High-precision results for the Nusselt number $N$ as a function of the Rayleigh number $R$ for liquid and gaseous helium revealed no singularities in $N(R)$, except at the convective threshold ${R}_{c}$. For $Rg2.19{R}_{c}$, a new turbulent state was found and characterized by measuring the frequency spectrum and the amplitude of $N(R)$.