在湍流瑞利-贝纳德对流中测量的局部热传输。
Measured local heat transport in turbulent Rayleigh-Bénard convection.
作者信息
Shang X-D, Qiu X-L, Tong P, Xia K-Q
机构信息
Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong, China.
出版信息
Phys Rev Lett. 2003 Feb 21;90(7):074501. doi: 10.1103/PhysRevLett.90.074501. Epub 2003 Feb 20.
Abstract
Local convective heat flux in turbulent thermal convection is obtained from simultaneous velocity and temperature measurements in an aspect-ratio-one convection cell filled with water. It is found that fluctuations of the vertical heat flux are highly intermittent and are determined primarily by the thermal plumes in the system. The experiment reveals a unique mechanism for the heat transport in turbulent convection.
摘要
通过在一个充满水、纵横比为1的对流槽中同时进行速度和温度测量，获得了湍流热对流中的局部对流热通量。研究发现，垂直热通量的波动具有高度间歇性，并且主要由系统中的热羽流决定。该实验揭示了湍流对流中热传输的一种独特机制。
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