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Simulation of the spray coating process using a pneumatic atomizer

Influences of operating conditions and target geometries
: Ye, Qiaoyan; Pulli, Karlheinz

Sommerfeld, M. ; Univ. Halle-Wittenberg, Lehrstuhl für Mechanische Verfahrenstechnik; European Research Community on Flow, Turbulence and Combustion:
12th Workshop on Two-Phase Flow Predictions 2010. Proceedings. CD-ROM : Halle (Saale), March 22 - 25, 2010
Halle/Saale, 2010
ISBN: 978-3-86829-222-0
7 S.
Workshop on Two-Phase Flow Predictions <12, 2010, Halle/Saale>
Fraunhofer IPA ()
painting process; spray painting; atomization; pneumatischer Zerstäuber; Film-Thickness; Simulation

This paper presents the numerical simulation of the spray painting process using a pneumatic atomizer with the help of a computational fluid dynamics code. The droplet characteristics that are necessary for the droplet trajectory calculation were experimentally investigated using different shaping air flow rates. It was found that the droplet size distribution depends on both the atomizing and the shaping air flow rate. The injection model for creating initial conditions of droplets that takes account of the influences of the operating conditions is necessary for the spray painting simulation. Some tests on complicated targets and complex alignments of the atomizer have been carried out to verify the numerical approach. The results confirm the applicability and reliability of the chosen models for the painting process.