Simultaneous numerical simulation of direct and inverse cascades in wave turbulence.
The results of the direct numerical simulation of isotropic turbulence of surface gravity waves in the framework of Hamiltonian equations are presented. For the first time, the simultaneous formation of both direct and inverse cascades has been observed in the framework of the primordial dynamical equations. At the same time, a strong long wave background has been developed. It has been shown that the Kolmogorov spectra obtained are very sensitive to the presence of this condensate. Such a situation has to be typical for experimental wave tanks, flumes, and small lakes.
Korotkevich
A O
AO
L. D. Landau Institute for Theoretical Physics RAS, 2 Kosygin Street, Moscow, 119334, Russian Federation. kao@itp.ac.ru