Collisions of micron-sized, charged water droplets in still air
arXiv:2106.11543 · doi:10.1103/PhysRevFluids.7.043601
Abstract
We investigate the effect of electrical charge on collisions of hydrodynamically interacting, micron-sized water droplets settling through quiescent air. The relative dynamics of charged droplets is determined by hydrodynamic interactions, particle and fluid inertia, and electrostatic forces. We analyse the resulting relative dynamics of oppositely charged droplets by determining its fixed points and their stable and unstable manifolds. The stable manifold of a saddle point forms a separatrix that separates colliding trajectories from those that do not collide. The qualitative conclusions from this theory are in excellent agreement with experiments.
arXiv comment6 pages, 2 figures, supplemental material
References in corpus (8)
- Caustic activation of rain showers
- Statistical models for spatial patterns of heavy particles in turbulence
- Relative velocities of inertial particles in turbulent aerosols
- Settling of an asymmetric dumbbell in a quiescent fluid
- Hydrodynamic interactions and extreme particle clustering in turbulence
- Aperiodic tumbling of microrods advected in a microchannel flow
- Optical manipulation for studies of collisional dynamics of micron-sized droplets under gravity
- Lagrangian tracking of colliding droplets