Universality of Local Dissipation Scales in Buoyancy-Driven Turbulence
Publication in refereed journal

香港中文大學研究人員

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摘要We report an experimental investigation of the local dissipation scale field eta in turbulent thermal convection. Our results reveal two types of universality of eta. The first one is that, for the same flow, the probability density functions (PDFs) of eta are insensitive to turbulent intensity and large-scale inhomogeneity and anisotropy of the system. The second is that the small-scale dissipation dynamics in buoyancy-driven turbulence can be described by the same models developed for homogeneous and isotropic turbulence. However, the exact functional form of the PDF of the local dissipation scale is not universal with respect to different types of flows, but depends on the integral-scale velocity boundary condition, which is found to have an exponential, rather than Gaussian, distribution in turbulent Rayleigh-Benard convection.
著者Zhou Q, Xia KQ
期刊名稱Physical Review Letters
出版年份2010
月份3
日期26
卷號104
期次12
出版社AMER PHYSICAL SOC
國際標準期刊號0031-9007
電子國際標準期刊號1079-7114
語言英式英語
Web of Science 學科類別Physics; Physics, Multidisciplinary; PHYSICS, MULTIDISCIPLINARY

上次更新時間 2020-21-11 於 00:27