Particle diffusion in a frozen isotropic 2D random velocity field is studied by simulation, and the results are compared with prediction of simple model. The model accounts for effects particle trapping infinite correlation time.

<p style='text-indent:20px;'>We propose the novel augmented Gaussian random field (AGRF), which is a universal framework incorporating data of observable and derivatives any order. Rigorous theory established. We prove that under certain conditions, its order are governed by single field, aforementioned AGRF. As corollary, statement "the derivative process remains process" validated, sinc...