Pair dispersion in turbulence

Details Pair dispersion in turbulence Pair dispersion in turbulence

2001-02-20

arxiv.org/abs/nlin/0102023v1

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.

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