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Simplified modeling of slide-fed curtain coating flow  

Jung Hyun Wook (Department of Chemical and Biological Engineering, Korea University)
Lee Joo Sung (Department of Chemical and Biological Engineering, Korea University)
Hyun Jae Chun (Department of Chemical and Biological Engineering, Korea University)
Kim See Jo (Department of Mechanical Engineering, Andong National University)
Scriven L. E. (Department of Chemical Engineering and Materials Science, University of Minnesota)
Publication Information
Korea-Australia Rheology Journal / v.16, no.4, 2004 , pp. 227-233 More about this Journal
Abstract
Simplified model of slide-fed curtain coating flow has been developed and tested in this study. It rests on the sheet profile equations for curtain thickness in curtain flow and its trajectory derived by the integral momentum balance approach of Higgins and Scriven (1979) and Kistler (1983). It also draws on the film profile equation of film thickness variation in flow down a slide. The equations have been solved in finite difference approximation by Newton iteration with continuation. The results show that how inertia (Rey­nolds number), surface tension (capillary number), inclination angle of the slide, and air pressure difference across the curtain affect sheet trajectory and thickness profile. It has been revealed that approximate models can be useful to easily analyze coating flow dynamics without complex computations, giving qualitative agreement with full theory and with experiment.
Keywords
curtain coating; slide flow; curtain flow; sheet profile equation; curtain trajectory; integral momentum balance; simplified modeling;
Citations & Related Records

Times Cited By Web Of Science : 4  (Related Records In Web of Science)
Times Cited By SCOPUS : 5
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