The atomization process plays a central role in the spray coating. In the atomization process coating materials break into droplets. An optimized atomization process should provide the high coating quality on the substrate surface with high transfer efficiencies of coating materials. Within the frame of a German joint project "Glaze-Forming" funded by BMBF, the influence of atomizing assisting gases, namely by switching from air to steam on coating processes, is investigated. Numerical simulations were performed by means of the commercial CFD solver ANSYS FLUENT. The turbulent flow field was calculated by solving the Reynolds-averaged Navier-Stokes equations. Based on discrete phase Models, the trajectory calculation of the droplets was also carried out.
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