Abstract
Two-particle dispersion in fully developed turbulence is modeled within an asymmetric L\'evy-walk framework which yields the Richardson ${t}^{3}$ law and which recovers recently observed results on the probability distribution function of pair separations in two-dimensional turbulence [M.C. Jullien, J. Paret, and P. Tabeling, Phys. Rev. Lett. 82, 2872 (1999)]. The ballistic nature of the Richardson dispersion is discussed in terms of the persistence parameter and compared with the Richardson diffusive behavior.
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