Numerical simulation of collision dynamics for finite size particles in turbulent suspension

Stéphane Vincent (1) , Jorge César Brändle de Motta (2, 3) , Éric Climent (3) , Jean-Luc Estivalezes (3, 4)

1 MSME - Laboratoire de Modélisation et Simulation Multi Echelle
2 CORIA - Complexe de recherche interprofessionnel en aérothermochimie
3 IMFT - Institut de mécanique des fluides de Toulouse
4 ONERA - The French Aerospace Lab [Toulouse]

Particulate flows are present in many applications and the effect of particle size is still not well understood. The present paper describes three cases of sustained homogeneous tur- bulence interacting with particles. Simulations correspond to three particle-fluid density ratios and 3% volume fraction in zero grav- ity field. Fully resolved particle simulations are based on fictitious domain and penalty method. The local dissipation around particles is studied according to the density ratio. Spatial description of the averaged dissipation is provided. Collision statistics are also investigated. The inter collision time and the angle of collision are compared to the kinetic theory. The effect of the inter particle film drainage is highlighted by simulating the same configurations with and without lubrication model.

Domaines: Mécanique des fluides [physics.class-ph]

Stéphane Vincent, Jorge César Brändle de Motta, Éric Climent, Jean-Luc Estivalezes. Numerical simulation of collision dynamics for finite size particles in turbulent suspension. 9th International conference on multiphase flows (ICMF 2016), 2016, Florence, Italy. ⟨hal-01366985⟩