Амплитудночастотная характеристика фоторефрактивного кристалла
Зельдович Б. Я., Ильиных П.Н., Подошведов С. А.
Advection of a passive scalar θ in d — 2 by a large-scale velocity field rapidly changing in time is considered. The Gaussian feature of the passive scalar statistics in the convective interval was discovered in [1]. Here we examine deviations from the Gaussianity: we obtain analytically the simultaneous fourth-order correlation function of 0. Explicit expressions for fourth-order objects, like {(0i — 0г)4) derived.