Diffusion in biased turbulence.
Particle transport in two-dimensional divergence-free stochastic velocity fields with constant average is studied. Analytical expressions for the Lagrangian velocity correlation and for the time-dependent diffusion coefficients are obtained. They apply to stationary and homogeneous Gaussian velocity fields.
Vlad
M
M
Association Euratom-NASTI Romania, National Institute for Laser, Plasma and Radiation Physics, P.O. Box MG-36, Magurele, Bucharest, Romania.
Spineanu
F
F
Misguich
J H
JH
Balescu
R
R