Linking dissipation, anisotropy, and intermittency in rotating stratified turbulence at the threshold of linear shear instabilities
Pouquet, A., Rosenberg, D., Marino, R.. (2019). Linking dissipation, anisotropy, and intermittency in rotating stratified turbulence at the threshold of linear shear instabilities. Physics of Fluids, doi:https://doi.org/10.1063/1.5114633
| Title | Linking dissipation, anisotropy, and intermittency in rotating stratified turbulence at the threshold of linear shear instabilities |
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| Genre | Article |
| Author(s) | Annick Pouquet, D. Rosenberg, Raffaele Marino |
| Abstract | Analyzing a large database of high-resolution three-dimensional direct numerical simulations of decaying rotating stratified flows, we show that anomalous mixing and dissipation, marked anisotropy, and strong intermittency are all observed simultaneously in an intermediate regime of parameters in which both waves and eddies interact nonlinearly. A critical behavior governed by the stratification occurs at Richardson numbers of order unity and with the flow close to being in a state of instability. This confirms the central dynamical role, in rotating stratified turbulence, of large-scale intermittency, which occurs in the vertical velocity and temperature fluctuations, as an adjustment mechanism of the energy transfer in the presence of strong waves. |
| Publication Title | Physics of Fluids |
| Publication Date | Oct 1, 2019 |
| Publisher's Version of Record | https://doi.org/10.1063/1.5114633 |
| OpenSky Citable URL | https://n2t.org/ark:/85065/d73r0x0t |
| OpenSky Listing | View on OpenSky |
| CISL Affiliations | CISLAODEPT |