Stationary vortical flows in two-dimensional plasma and in planetary atmospheres.
We derive the equation governing the asymptotic stationary states generated by decaying turbulence in two-dimensional plasma and planetary atmosphere. These fluids may be described by the Charney-Hasegawa-Mima equation and their relaxation states show a high degree of organization in vortical flows, similar to the Euler fluid. We develop a field-theoretical framework and show that these systems attain at stationarity the extremum of an energy functional corresponding to self-dual fields.
Spineanu
F
F
Association EURATOM-MEC Romania, NILPRP, MG-36, Magurele, Bucharest, Romania. spineanu@ifin.nipne.ro
Vlad
M
M