Temporal correlation function in 3-D Turbulence
| dc.creator | Sain, Anirban | |
| dc.date | 2000-01-16 | |
| dc.date | 2000-01-29 | |
| dc.date.accessioned | 2026-07-07T05:32:37Z | |
| dc.date.available | 2026-07-07T05:32:37Z | |
| dc.description | We observe oscillatory decay in the two-point, non-equal time, velocity correlation function of homogeneous, isotropic turbulence. We found this through a direct numerical simulation (DNS) of the three dimensional Navier-Stokes ($3-D$ NS) equation. We give an approximate analytic theory which explains this oscillatory behaviour. The wave-number and frequency dependent effective viscosity turns out to be complex; the imaginary part gives rise to the temporal oscillation. We find that, at least for the decay at short times, data collapse occur among the inertial range velocity wave-vector modes with the long time dynamic exponent $z=2/3$, but the time period of the temporal oscillation is not universal. | |
| dc.description | 5 pages, 6 figures, Minor changes and addition of content, Email : asain@sfu.ca | |
| dc.identifier | https://arxiv.org/abs/nlin/0001031 | |
| dc.identifier | http://arxiv.org/abs/nlin/0001031 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/79720 | |
| dc.subject | Chaotic Dynamics | |
| dc.title | Temporal correlation function in 3-D Turbulence | |
| dc.type | text |