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스프레이 도장에서 제품 모서리의 도료 뭉침 현상에 대한 수치해석적 연구
이상혁(Sang Hyuk Lee),허남건(Nahmkeon Hur),홍석현(Seok Hyun Hong),임기열(Ki Yul Lim),배아현(Ah-Hyun Bae) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
It is important to predict the paint sagging in the spray painting for the quality assurance and quality improvement of painting process. With the effect of surface tension of paint film around object, the paint sagging easily occurs around the corner of object. In the present study, the two-phase interfacial flow of the paint film on the small plastic object was numerically investigated by using a VOF method. For the simulation of paint sagging phenomenon, the paint properties such as density, viscosity and surface tension coefficient was measured with the paint used in the spray painting of plastic object. With these paint properties, the behavior of paint film was predicted with the specific initial film thickness around the painted object. In the steady state of film behavior, the numerical results of film thickness showed a good agreement with the experimental results. The characteristics of paint sagging around corner were numerically analyzed with various geometric model.