Stochastic Lagrangian Models for Two-Particle Motion in Turbulent Flows. Numerical Results

s — It is shown that the relative diffusion in a stationary incompressible Gaussian isotropic random field does not exhibit the Richardson cubic law. A two particle combined Eulerian-Lagrangian stochastic model which correctly reflects the behaviour in the inertial subrange is developed. In addition, in this model, the "two-to-one" reduction due to Thomson is satisfied with high accuracy except for a small initial time interval where the error is slightly higher.

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