Effects of forcing in three dimensional turbulent flows
| dc.creator | Biferale, Luca | |
| dc.creator | Lanotte, Alessandra | |
| dc.creator | Toschi, Federico | |
| dc.date | 2003-10-16 | |
| dc.date.accessioned | 2026-07-07T05:35:00Z | |
| dc.date.available | 2026-07-07T05:35:00Z | |
| dc.description | We present the results of a numerical investigation of three-dimensional homogeneous and isotropic turbulence, stirred by a random forcing with a power law spectrum, $E_f(k)\sim k^{3-y}$. Numerical simulations are performed at different resolutions up to $512^3$. We show that at varying the spectrum slope $y$, small-scale turbulent fluctuations change from a {\it forcing independent} to a {\it forcing dominated} statistics. We argue that the critical value separating the two behaviours, in three dimensions, is $y_c=4$. When the statistics is forcing dominated, for $y<y_c$, we find dimensional scaling, i.e. intermittency is vanishingly small. On the other hand, for $y>y_c$, we find the same anomalous scaling measured in flows forced only at large scales. We connect these results with the issue of {\it universality} in turbulent flows. | |
| dc.description | 4 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/nlin/0310022 | |
| dc.identifier | http://arxiv.org/abs/nlin/0310022 | |
| dc.identifier | Physical Review Letters 92 (2004) 094503 | |
| dc.identifier | doi:10.1103/PhysRevLett.92.094503 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/80580 | |
| dc.subject | Chaotic Dynamics | |
| dc.subject | Statistical Mechanics | |
| dc.subject | Fluid Dynamics | |
| dc.title | Effects of forcing in three dimensional turbulent flows | |
| dc.type | text |