Clustering of particles falling in a turbulent flow

Abstract

Spatial clustering of identical particles falling through a turbulent flow 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 may be strongly anisotropic.

5 pages, 3 figures, supplemental material

References in corpus (7)

• Caustic activation of rain showers
• Lyapunov exponents of heavy particles in turbulence
• Quantifying turbulence induced segregation of inertial particles
• Observation of the sling effect
• Unmixing in Random Flows
• Generalised Ornstein-Uhlenbeck processes
• Distribution of velocity gradients and rate of caustic formation in turbulent aerosols at finite Kubo numbers

Cited by in corpus (29)

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