Dynamics of saturated condensation in two-dimensional turbulence
by
DrChi-kwan Chan(Nordita)
→
Europe/Stockholm
122:026
122:026
Description
We derive and numerically confirm that the saturation of energy
condensation in two-dimensional turbulence is governed by the
balance between forcing and small-scale dissipation.
It is shown that, because the energy dissipation is proportional to
the enstrophy, which itself is a conserved quantity in the ideal
case, it is necessary to resolve the enstrophy spectrum to archive
numerical consistence.
We also study properties of the condensate vortices.
Specifically, their movement is found to be consistent with Brownian
motion on long enough time scales.