Nonlinear Sciences – Chaotic Dynamics
Scientific paper
2001-02-20
Physica A, vol.280, p.1 (2000)
Nonlinear Sciences
Chaotic Dynamics
11 pages, 5 figures
Scientific paper
10.1016/S0378-4371(99)00613-5
We study the statistics of pair dispersion in two-dimensional turbulence. Direct numerical simulations show that the pdf of pair separations is in agreement with the Richardson prediction. The pdf of doubling times follows dimensional scaling and shows a long tail which is the signature of close approaches between particles initially seeded with a large separation. This phenomenon is related to the formation of fronts in passive scalar advection.
Boffetta Guido
Celani Antonio
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