Settling and clustering of particles of moderate mass density in turbulence
arXiv:2102.01209 · doi:10.1103/PhysRevFluids.6.114304
Abstract
We present a numerical study of settling and clustering of small inertial particles in homogeneous and isotropic turbulence. Particles are denser than the fluid, but not in the limit of being much heavier than the displaced fluid. At fixed Reynolds and Stokes numbers we vary the fluid-to-particle mass ratio and the gravitational acceleration. The effect of varying one or the other is similar but not quite the same. We report non-monotonic behavior of the particles' velocity skewness and kurtosis with the second parameter, and an associated anomalous behavior of the settling velocity when compared to the free-fall Stokes velocity, including loitering cases. Clustering increases for increasing gravitational acceleration, and for decreasing fluid-to-particle mass ratio.
References in corpus (19)
- Measurement of Lagrangian velocity in fully developed turbulence
- Finite-size effects in the dynamics of neutrally buoyant particles in turbulent flow
- Gravity-driven enhancement of heavy particle clustering in turbulent flow
- Three-dimensional Lagrangian Voronoi analysis for clustering of particles and bubbles in turbulence
- An efficient, second order method for the approximation of the Basset history force
- Coherent structures and extreme events in rotating multiphase turbulent flows
- Acceleration of heavy and light particles in turbulence: comparison between experiments and direct numerical simulations
- Preferential concentration of inertial sub-kolmogorov particles. The roles of mass loading of particles, Stokes and Reynolds numbers
- Quantifying turbulence induced segregation of inertial particles
- Multiscale preferential sweeping of particles settling in turbulence
- On the clustering of finite-size particles in turbulence
- Mechanisms for the clustering of inertial particles in the inertial range of isotropic turbulence
- Preferential concentration of free-falling heavy particles in turbulence
- Voronoi tesselation analysis of sets of randomly placed finite-size spheres
- Velocity and acceleration statistics in particle-laden turbulent swirling flows
- Study on preferential concentration of inertial particles in homogeneous isotropic turbulence via Big-Data techniques
- Clustering of vertically constrained passive particles in homogeneous, isotropic turbulence
- Statistics of single and multiple floaters in experiments of surface wave turbulence
- Inertial floaters in stratified turbulence