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

Overview & Synopsis

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.