Experiments and Large Eddy Simulations are carried out to study the interaction of spherical particles (micrometric oil droplets) with a turbulent air jet impacting a wall. The context is that of the dynamical air curtains used to separate a contaminated atmosphere with passive particles from a clean atmosphere. In the experiment, the aspect ratio H/e of the jet is equal to ten. A spinning disk is used to produce oil droplets close to the air jet. The droplet diameter varies in the range 0.35 µm