Growth of Noninfinitesimal Perturbations in Turbulence
Growth of Noninfinitesimal Perturbations in Turbulence
We discuss the effects of finite perturbations in fully developed turbulence by introducing a measure of the chaoticity degree associated to a given scale of the velocity field. This allows one to determine the predictability time for noninfinitesimal perturbations, generalizing the usual concept of maximum Lyapunov exponent. We also determine …