Evidence for finite dissipation during vortex reconnection – Rober Kerr, University of Warwick

When:
February 27, 2020 @ 3:00 pm – 4:00 pm
2020-02-27T15:00:00+00:00
2020-02-27T16:00:00+00:00
Where:
MR 14
Contact:
Edriss S. Titi

This presentation will show evidence that growth of the volume-integrated enstrophy Z through, then beyond, the first reconnection of isolated vortices is sufficient to first show convergence of √νZ. This is followed by convergence of the dissipation rate ε=νZ over a finite time, consistent with the existence of finite-time dissipation anomalies. But only so long as the domain size V increases as ν decreases. Also to be discussed are the evolution of spectra, the helicity and the helicity transfer.