Pharasi, Hirdesh K. ; Kumar, Deepesh ; Kumar, Krishna ; Bhattacharjee, Jayanta K. (2016) Spectra and probability distributions of thermal flux in turbulent Rayleigh-Bénard convection Physics of Fluids, 28 (5). 055103. ISSN 1070-6631
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Official URL: http://doi.org/10.1063/1.4948644
Related URL: http://dx.doi.org/10.1063/1.4948644
Abstract
The spectra of turbulent heat flux H(k) in Rayleigh-Bénard convection with and without uniform rotation are presented. The spectrum H(k) scales with wave number k as ∼k−2. The scaling exponent is almost independent of the Taylor number Ta and Prandtl number Pr for higher values of the reduced Rayleigh number r (>103). The exponent, however, depends on Ta and Pr for smaller values of r (<103). The probability distribution functions of the local heat fluxes are non-Gaussian and have exponential tails.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Institute of Physics. |
| ID Code: | 133826 |
| Deposited On: | 30 Dec 2022 09:43 |
| Last Modified: | 30 Dec 2022 09:43 |
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