Turbulent clustering of low-inertia droplets

Prelegent(ci)

Gustavo Abade

Afiliacja

Instytut Geofizyki FUW UW

Termin

15 października 2020 12:30

Informacje na temat wydarzenia

Zoom

Seminarium

Seminarium Zakładu Równań Fizyki Matematycznej

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Several effects of turbulence may reduce the time for rain initiation in warm (ice-free) atmospheric clouds. This talk overviews the effect of turbulent clustering of inertial droplets that interact hydrodynamically. Using the so-called drift-diffusion model (based on the Master equation satisfied by the probability of finding two droplets separated by a given distance) it is shown that hydrodynamic interactions have a strong impact on clustering at small (sub-Kolmogorov) length scales. This enhances droplet collision probabilities and may accelerate precipitation formation.  Mechanisms for droplet clustering at larger length scales (in the inertial range of isotropic turbulence) are also discussed.

Link do spotkania na Zoomie:

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