Mar 26 – 28, 2014
Nordita, Stockholm
Europe/Stockholm timezone

Clustering of particles falling in a turbulent aerosol

Mar 26, 2014, 10:30 AM
45m
132:028 (Nordita, Stockholm)

132:028

Nordita, Stockholm

Speaker

Bernhard Mehlig (University of Gothenburg)

Description

Spatial clustering of identical particles falling through a turbulent aerosol enhances the collision rate between the falling particles, an important problem in aerosol science. We analyse this problem using perturbation theory in a dimensionless parameter, the so-called Kubo number. This allows us to derive an analytical theory quantifying the spatial clustering. We find that clustering of small particles in incompressible random velocity fields may be reduced or enhanced by the effect of gravity, depending on the Stokes number of the particles and the Froude number of the flow. This work was performed in collaboration with K. Gustavsson (University of Gothenburg).

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