Clustering in laboratory and numerical turbulent swirling flows
Fluid Dynamics
2022-09-21 v2
Abstract
We study the three-dimensional clustering of velocity stagnation points, of nulls of the vorticity and of the Lagrangian acceleration, and of inertial particles in turbulent flows at fixed Reynolds numbers, but under different large-scale flow geometries. To this end, we combine direct numerical simulations of homogeneous and isotropic turbulence and of the Taylor-Green flow, with particle tracking velocimetry in a von K\'arm\'an experiment. While flows have different topologies (as nulls cluster differently), particles behave similarly in all cases, indicating that Taylor-scale neutrally buoyant particles cluster as inertial particles.
Keywords
Cite
@article{arxiv.2203.10195,
title = {Clustering in laboratory and numerical turbulent swirling flows},
author = {Sofía Angriman and Amélie Ferran and Florencia Zapata and Pablo J. Cobelli and Martin Obligado and Pablo D. Mininni},
journal= {arXiv preprint arXiv:2203.10195},
year = {2022}
}