SELF-DIFFUSION AND RELATIVE DIFFUSION IN DEFECT TURBULENCE

We consider the motion of particles and scalar flow in the defect-turb ulent regime of the complex Ginzburg-Landau field. We find that the pa rticle motion is diffusion-like at large time scales, whereas the moti on is dominated by trapping of particles by defects of the field at sh ort time scales. Consequently the diffusion constant is constrained. F or relative motion of two paricles we find that at a relative distance s the distribution of ds(2)/dt is exponential rather than Gaussian as would be the case for Brownian motion.