Dependence of heat transport on the strength and shear rate of prescribed circulating flows
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摘要We study numerically the dependence of heat transport on the maximum velocity and shear rate of physical circulating flows, which are prescribed to have the key characteristics of the large-scale mean flow observed in turbulent convection. When the side-boundary thermal layer is thinner than the viscous boundary layer, the Nusselt number (Nu), which measures the heat transport, scales with the normalized shear rate to an exponent 1/3. On the other hand, when the side-boundary thermal layer is thicker, the dependence of Nu on the Peclet number, which measures the maximum velocity, or the normalized shear rate when the viscous boundary layer thickness is fixed, is generally not a power law. Scaling behavior is obtained only in an asymptotic regime. The relevance of our results to the problem of heat transport in turbulent convection is also discussed.
著者Ching ESC, Pang KM
期刊名稱European Physical Journal B: Condensed Matter and Complex Systems
出版年份2002
月份6
日期1
卷號27
期次4
出版社SPRINGER-VERLAG
頁次559 - 564
國際標準期刊號1434-6028
電子國際標準期刊號1434-6036
語言英式英語
Web of Science 學科類別Physics; Physics, Condensed Matter; PHYSICS, CONDENSED MATTER

上次更新時間 2020-02-07 於 01:21