Spontaneous suppression of inverse energy cascade in instability-driven
2D turbulence
Spontaneous suppression of inverse energy cascade in instability-driven
2D turbulence
Instabilities of fluid flows often generate turbulence. Using extensive direct numerical simulations, we study two-dimensional turbulence driven by a wavenumber-localised instability superposed on stochastic forcing, in contrast to previous studies of state-independent forcing. As the instability growth rate increases, the system undergoes two transitions. For growth rates below a first …