Temperature and vertical velocity fluctuations are measured in turbulent Rayleigh-B\'enard convection for Rayleigh numbers 2×10⁸<R<4×10⁹ in cells with cylindrical and square geometries with approximately unit-aspect ratios. The geometries are constructed such that they have the same height and cross sectional area. We find, very unexpectedly, that both the magnitudes and scalings of fluctuations as a function of R depend strongly on the geometry. This latter result implies a possible nonuniversality in internal fluctuations and poses significant difficulties for existing model descriptions of turbulent convection.
No takes yet. Share an insight, caveat, or question.
Daya et al. (2001) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: