Statistical model for the orientation of non-spherical particles settling in turbulence
arXiv:1702.07516 · doi:10.1103/PhysRevLett.119.254501
Abstract
The orientation of small anisotropic particles settling in a turbulent fluid determines some essential properties of the suspension. We show that the orientation distribution of small heavy spheroids settling through turbulence can be accurately predicted by a simple Gaussian statistical model that takes into account particle inertia and provides a quantitative understanding of the orientation distribution on the problem parameters when fluid inertia is negligible. Our results open the way to a parameterisation of the distribution of ice-crystals in clouds, and potentially leads to an improved understanding of radiation reflection, or particle aggregation through collisions in clouds.
6 pages, 3 figures, revised version, supplemental material
References in corpus (8)
- Rotation Rate of Rods in Turbulent Fluid Flow
- Numerical Study of the Sedimentation of Spheroidal Particles
- Shape-dependence of particle rotation in isotropic turbulence
- Microbubbles and microparticles are not faithful tracers of turbulent acceleration
- Measurements of the Solid-body Rotation of Anisotropic Particles in 3D Turbulence
- Angular dynamics of a small particle in turbulence
- Angular dynamics of small crystals in viscous flow
- Experimental study of forces on freely moving spherical particles during resuspension into turbulent flow
Cited by in corpus (15)
- Theory for the effect of fluid inertia on the orientation of a small particle settling in turbulence
- Importance of fluid inertia for the orientation of spheroids settling in turbulent flow
- Kinematics and dynamics of freely rising spheroids at high Reynolds numbers
- Orientation Dynamics of Sedimenting Anisotropic Particles in Turbulence
- Effect of particle inertia on the alignment of small ice crystals in turbulent clouds
- Experimental validation of fluid inertia models for a cylinder settling in a quiescent flow
- Rotation of anisotropic particles in Rayleigh-Bénard turbulence
- Anisotropic particles in two-dimensional convective turbulence
- Particles in turbulent separated flow over a bump: effect of the Stokes number and lift force
- Inertial spheroids in homogeneous, isotropic turbulence
- Alignment of elongated swimmers in a laminar and turbulent Kolmogorov flow
- Rotational dynamics of bottom-heavy rods in turbulence from experiments and numerical simulations
- Helicoidal particles in turbulent flows with multi-scale helical injection
- Pair statistics of oblate spheroids settling in a turbulent flow
- Spinning and tumbling of micron-sized triangles in a micro-channel shear flow