In:
Annual Review of Fluid Mechanics, Annual Reviews, Vol. 42, No. 1 ( 2010-01-01), p. 335-364
Abstract:
The properties of the structure functions and other small-scale quantities in turbulent Rayleigh-Bénard 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 θ (r) ∼ r 2/5 for the second-order temperature structure function and S u (r) ∼ 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.
Type of Medium:
Online Resource
ISSN:
0066-4189
,
1545-4479
DOI:
10.1146/fluid.2010.42.issue-1
DOI:
10.1146/annurev.fluid.010908.165152
Language:
English
Publisher:
Annual Reviews
Publication Date:
2010
detail.hit.zdb_id:
241348-6
detail.hit.zdb_id:
2010314-1
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