Energy budget in Rayleigh-Bénard convection.
Energy budget in Rayleigh-Bénard convection.
复制标题
瑞利-贝纳德对流中的能量收支。
DOI：
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发表时间：
2000
影响因子：
8.6
通讯作者：
Robert McDougall Kerr
中科院分区：
文献类型：
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作者：
Robert McDougall Kerr
它示出使用三个系列的瑞利数模拟的不同纵横比AR和普朗特数Pr的归一化耗散在壁，而显着大于1，接近一个常数依赖于AR和Pr。它还发现，峰值速度，而不是均方速度，服从实验缩放Ra（0.5）。均方速度的标度更接近Ra（0.46），这表明与实验测量和Nu和温度标度的数值结果一致，如果速度和温度之间存在强相关性。
It is shown using three series of Rayleigh number simulations of varying aspect ratio AR and Prandtl number Pr that the normalized dissipation at the wall, while significantly greater than 1, approaches a constant dependent upon AR and Pr. It is also found that the peak velocity, not the mean square velocity, obeys the experimental scaling of Ra(0.5). The scaling of the mean square velocity is closer to Ra(0.46), which is shown to be consistent with experimental measurements and the numerical results for the scaling of Nu and the temperature if there are strong correlations between the velocity and temperature.