Experiments and large eddy simulations on particle interaction with a turbulent air jet impacting a wall

Expériences et simulations sur l'interaction de particules avec un jet d'air turbulent impactant une paroi

Syphax Ikardouchene (1) , Xavier Nicolas (2) , Stéphane Delaby (1) , Meryem Ould-Rouiss (2)

1 CSTB - Centre Scientifique et Technique du Bâtiment
2 MSME - Laboratoire de Modélisation et Simulation Multi Echelle

Experiments and large eddy simulations are carried out to study the interaction of spherical particles with a turbulent air jet impacting a wall. The context is that of the dynamical air curtains used to separate a contaminated ambiance with passive or inertial particles from a clean ambiance. In the present study, the jet and particle Reynolds numbers and the jet and turbulence Stokes numbers are respectively equal to Re_j = 13500, 0.7 ≤ Re_p ≤ 3.5, 0.02 ≤ St_j ≤ 0.35 and 0.1 ≤ St_t ≤ 1: they mainly concern passive particles. The rate of the particles that cross the air jet is analyzed according to the particle size, for two particle injection heights. A non-monotonic passing rate of the particles through the jet with respect to the particle size is observed in the experiments.

Keywords: Impacting plane jet; Air curtain; Particle/jet interaction; Passive particles; Experiments; LES Large-Eddy Simulation

Domains: Physics [physics]; Mechanics [physics]; Fluid mechanics [physics.class-ph]

Syphax Ikardouchene, Xavier Nicolas, Stéphane Delaby, Meryem Ould-Rouiss. Experiments and large eddy simulations on particle interaction with a turbulent air jet impacting a wall. Deville M. et al. (eds). Turbulence and Interactions. TI2018, 149, Springer, pp.136-143, 2021, Notes in Numerical Fluid Mechanics and Multidiscipliary Design. ⟨hal-02642594⟩