Small-Scale Properties of Turbulent Rayleigh-Benard Convection
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AbstractThe properties of the structure functions and other small-scale quantities in turbulent Rayleigh-Benard convection are reviewed, from an experimental, theoretical, and numerical point of view. In particular, we address the question of whether, and if so where in the flow, the so-called Bolgiano-Obukhov scaling exists, i.e., S(0)(r) similar to r(2/5) for the second-order temperature structure function and S(u)(r) similar to r(6/5) for the second-order velocity structure function. Apart from the anisotropy and inhomogeneity of the flow, insufficiently high Rayleigh numbers, and intermittency corrections (which all hinder the identification of such a potential regime), there are also reasons, as a matter of principle, why such a scaling regime may be limited to at most a decade, namely the lack of clear scale separation between the Bolgiano length scale L(B) and the height of the cell.
All Author(s) ListLohse D, Xia KQ
Journal nameAnnual Review of Fluid Mechanics
Volume Number42
PublisherAnnual Reviews
Pages335 - 364
LanguagesEnglish-United Kingdom
KeywordsBolgiano scaling; structure functions; thermal convection; turbulence
Web of Science Subject CategoriesMechanics; Physics; Physics, Fluids & Plasmas

Last updated on 2021-24-01 at 01:04