7 papers · 1 filter
Statistical orientation and distribution of columnar ice crystals in turbulent flows
A. Pumir, M. Z. Sheikh, K. Gustavsson +3
We study the motion of columnar ice crystals that form in clouds over a range of low temperature. Our focus here is on elongated ice crystals, which are smaller than the size of th…
Fluid-inertia torques from particle-shape symmetry
L. Sundberg, F. Candelier, N. Fintzi +4
Numerical simulation of particle motion in fluids at low particle Reynolds numbers is often based on empirical force and torque models obtained by fitting force and torque from ab-…
Smart navigation of a gravity-driven glider with adjustable centre-of-mass
X. Jiang, J. Qiu, K. Gustavsson +2
Artificial gliders are designed to disperse as they settle through a fluid, requiring precise navigation to reach target locations. We show that a compact glider settling in a visc…
Transport barriers for microswimmers in unsteady flow
L. Storm, J. Qiu, K. Gustavsson +1
Certain flow structures trap active microorganisms over extended periods, impacting mortality and growth by inhibiting foraging, exploration, and predator evasion. We show that tra…
Does small-scale turbulence matter for ice growth in mixed-phase clouds?
G. Sarnitsky, G. Sardina, G. Svensson +3
Representing the glaciation of mixed-phase clouds in terms of the Wegener-Bergeron-Findeisen process is a challenge for many weather and climate models, which tend to overestimate…
Inertia induces strong orientation fluctuations of non-spherical atmospheric particles
T. Bhowmick, J. Seesing, K. Gustavsson +5
The orientation of non-spherical particles in the atmosphere, such as volcanic ash and ice crystals, influences their residence times, and the radiative properties of the atmospher…