Sling effect in collisions of water droplets in turbulent clouds

Nonlinear Sciences – Chaotic Dynamics

Scientific paper

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7 pages, 6 figures; preprint submitted to Journal of Atmospheric Sciences

Scientific paper

10.1175/2007JAS2371.1

We describe and evaluate the contribution of sling effect into the collision rate of the same-size water droplets in turbulent clouds. We show that already for Stokes numbers exceeding 0.2 the sling effect gives a contribution comparable to Saffman-Turner contribution, which may explain why the latter consistently underestimates collision rate (even with the account of preferential concentration).

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