The dynamics of heavy particles suspended in turbulent flows is of fundamental importance
for a wide range of questions in astrophysics, atmospheric physics, oceanography, and …

Collisions between particles suspended in a fluid play an important role in many physical
processes. As an example, collisions of microscopic water droplets in clouds are a …

We study the behaviour of large dust grains in turbulent molecular clouds (MCs). In primarily
neutral regions, dust grains move as aerodynamic particles, not necessarily with the gas. We …

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 analyze this …

We study the formation of caustics in vortex-dominated flows. We find that only particles
starting within a critical distance of a vortex which scales as the square roots of the particle …

In this work we investigate the dynamics of inertial particles using finite-time Lyapunov
exponents (FTLE). In particular, we characterize the attractor and repeller structures …

We have performed numerical simulations of inertial particles in random model flows in the
white-noise limit (at zero Kubo number, Ku= 0) and at finite Kubo numbers. Our results for …

An asymptotic solution is derived for the motion of inertial particles exposed to Stokes drag
in an unsteady random flow. This solution provides an estimate for the sum of Lyapunov …

We compute the fractal dimension of clusters of inertial particles in random flows at finite
values of Kubo (Ku) and Stokes (St) numbers, by a new series expansion in Ku. At small St …

Dust grains in neutral gas behave as aerodynamic particles, so they can develop large local
density fluctuations entirely independent of gas density fluctuations. Specifically, gas …