Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Xiaozhou He"'
Autor:
Maojing Huang, Xiaozhou He
Publikováno v:
Theoretical and Applied Mechanics Letters, Vol 12, Iss 2, Pp 100330- (2022)
We report the results of the direct numerical simulations of two-dimensional Rayleigh-Bénard convection(RBC) in order to study the influence of the periodic (PD) and confined (CF) samples on the heat transport Nu. The numerical study is conducted wi
Externí odkaz:
https://doaj.org/article/72696ca7f5764036abe2f27b73c4cd63
Autor:
Guenter Ahlers, Eberhard Bodenschatz, Robert Hartmann, Xiaozhou He, Detlef Lohse, Philipp Reiter, Richard J. A. M. Stevens, Roberto Verzicco, Marcel Wedi, Stephan Weiss, Xuan Zhang, Lukas Zwirner, Olga Shishkina
Publikováno v:
Physical review letters, 128(8):084501. American Physical Society
While the heat transfer and the flow dynamics in a cylindrical Rayleigh-Bénard (RB) cell are rather independent of the aspect ratio Γ (diameter/height) for large Γ, a small-Γ cell considerably stabilizes the flow and thus affects the heat transfe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7bea579728ad65110da7289cac570153
https://hdl.handle.net/2108/315674
https://hdl.handle.net/2108/315674
Publikováno v:
Journal of Fluid Mechanics. 918
Publikováno v:
Journal of Fluid Mechanics. 874:263-284
We report a systematic study of spatial variations of the probability density function (PDF) $P(\unicode[STIX]{x1D6FF}T)$ for temperature fluctuations $\unicode[STIX]{x1D6FF}T$ in turbulent Rayleigh–Bénard convection along the central axis of two
Publikováno v:
Theoretical and Applied Mechanics Letters, Vol 11, Iss 2, Pp 100237-(2021)
We propose a theoretical model for spatial variations of the temperature variance σ 2 ( z , r ) (z is the distance from the sample bottom and r the radial coordinate) in turbulent Rayleigh-Benard convection (RBC). Adapting the “attached-eddy” mo
Publikováno v:
Journal of Fluid Mechanics. 851:374-390
We critically analyse the different ways to evaluate the dependence of the Nusselt number ($\mathit{Nu}$) on the Rayleigh number ($\mathit{Ra}$) in measurements of the heat transport in turbulent Rayleigh–Bénard convection under general non-Oberbe
Publikováno v:
Journal of Fluid Mechanics. 840:408-431
We report a combined experimental and numerical study of the effect of boundary layer (BL) fluctuations on the scaling properties of the mean temperature profile$\unicode[STIX]{x1D703}(z)$and temperature variance profile$\unicode[STIX]{x1D702}(z)$in
Publikováno v:
Physical Review Fluids. 3
We present a theoretical model with no free parameters to describe a class of turbulent fluctuations with an exponential tail in the probability density function. For turbulent thermal convection the model (solid line) is compared with measured tempe
Publikováno v:
Physical Review Fluids. 2
A prediction (solid line) for the ultimate-state transition Rayleigh-number, with its pre-factor adjusted to fit the experimental value for a Prandtl number Pr = 0.82, passes through the DNS estimate for Pr = 0.021. Cryogenic observations of transiti
Autor:
Penger Tong, Xiaozhou He
Publikováno v:
Acta Mechanica Sinica. 30:457-467
The recent development of the elliptic model (He, et al. Phy. Rev. E, 2006), which predicts that the space-time correlation function Cu(r, τ) in a turbulent flow has a scaling form Cu(rE, 0) with rE being a combined space-time separation involving s