The orientation of nonspherical particles in the atmosphere, such as volcanic ash and ice
crystals, influences their residence times and the radiative properties of the atmosphere …

Collisions, resulting in aggregation of ice crystals in clouds, is an important step in the
formation of snow aggregates. Here, we study the collision process by simulating spheroid …

Direct numerical simulations are performed to evaluate the hydrodynamic forces and torque
on finite-length cylinders embedded in a uniform flow for a wide range of aspect ratios (2≤ …

A small spheroid settling in a quiescent fluid experiences an inertial torque that aligns it so
that it settles with its broad side first. Here we show that an active particle experiences such …

The settling behavior of individual spheres in a quiescent fluid was studied experimentally.
The dynamics of the spheres was analyzed in the parameter space of particle-to-fluid …

In mixed-phase clouds, graupel forms by riming, a process whereby ice crystals and
supercooled water droplets settling through a turbulent flow collide and aggregate. We …

This experimental study investigates the falling characteristics of spheroidal particles with
varying geometrical anisotropy, characterized by the aspect ratio (χ). The aspect ratio is …

In a dilute suspension where sinking spheroids or motile gyrotactic micro-organisms are
modelled as orientable and negatively buoyant particles, we have found analytical solutions …

We investigate experimentally the planar paths displayed by cylinders falling freely in a thin-
gap cell containing liquid at rest, by varying the elongation ratio and the Archimedes number …

Cloud-ice crystals, volcanic ash, and microplastic are ubiquitous in the atmosphere. These
non-spherical particles are small, but their mass density is much greater than that of air. Little …