Spectral imbalance and the normalized dissipation rate of turbulence
| dc.creator | Bos, Wouter J. T. | |
| dc.creator | Shao, L. | |
| dc.creator | Bertoglio, Jean-Pierre | |
| dc.date | 2007-12-17 | |
| dc.date.accessioned | 2026-07-07T08:49:43Z | |
| dc.date.available | 2026-07-07T08:49:43Z | |
| dc.description | The normalized turbulent dissipation rate $C_ε$ is studied in decaying and forced turbulence by direct numerical simulations, large-eddy simulations, and closure calculations. A large difference in the values of $C_ε$ is observed for the two types of turbulence. This difference is found at moderate Reynolds number, and it is shown that it persists at high Reynolds number, where the value of $C_ε$ becomes independent of the Reynolds number, but is still not unique. This difference can be explained by the influence of the nonlinear cascade time that introduces a spectral disequilibrium for statistically nonstationary turbulence. Phenomenological analysis yields simple analytical models that satisfactorily reproduce the numerical results. These simple spectral models also reproduce and explain the increase of $C_ε$ at low Reynolds number that is observed in the simulations. | |
| dc.identifier | https://arxiv.org/abs/0712.2799 | |
| dc.identifier | http://arxiv.org/abs/0712.2799 | |
| dc.identifier | Physics of Fluids 19 (2007) 045101 | |
| dc.identifier | doi:10.1063/1.2714079 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/144403 | |
| dc.subject | Classical Physics | |
| dc.title | Spectral imbalance and the normalized dissipation rate of turbulence | |
| dc.type | text |