Pharasi, Hirdesh K. ; Kumar, Krishna ; Bhattacharjee, Jayanta K. (2014) Frequency spectra of turbulent thermal convection with uniform rotation Physical Review E - Statistical, Nonlinear and Soft Matter Physics, 90 (4). ISSN 1539-3755
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Official URL: http://doi.org/10.1103/PhysRevE.90.041004
Related URL: http://dx.doi.org/10.1103/PhysRevE.90.041004
Abstract
The frequency spectra of the entropy and kinetic energy along with the power spectrum of the thermal flux are computed from direct numerical simulations for turbulent Rayleigh-Bénard convection with uniform rotation about a vertical axis in low-Prandtl-number fluids (Pr<0.6). Simulations are done for convective Rossby numbers Ro≥0.2. The temporal fluctuations of these global quantities show two scaling regimes: (i) ω(-2) at higher frequencies for all values of Ro and (ii) ω(-γ1) at intermediate frequencies with γ1≈4 for Ro>1, while 4<γ1<6.6 for 0.2≤Ro<1.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 133839 |
| Deposited On: | 30 Dec 2022 10:06 |
| Last Modified: | 30 Dec 2022 10:06 |
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