ERGODICITY AND FLUCTUATIONS OF A FLUID PARTICLE DRIVEN BY DIFFUSIONS WITH JUMPS

摘要

In this paper, we study the long-time behavior of a fluid particle immersed in a turbulent fluid driven by a diffusion with jumps, that is, a Feller process associated with a non-local operator. We derive the law of large numbers and central limit theorem for the evolution process of the tracked fluid particle in the cases when the driving process: (i) has periodic coefficients, (ii) is ergodic or (iii) is a class of Levy processes. The presented results generalize the classical and well-known results for fluid flows driven by elliptic diffusion processes.