Effect of upstream meniscus shape on dynamic wetting and operating limits of Newtonian coating liquids in slot coating bead flows
- Authors
- Ahn, Won-Gi; Lee, Si Hyung; Nam, Jaewook; Kim, See Jo; Lee, Kwan-Young; Jung, Hyun Wook
- Issue Date
- 9월-2018
- Publisher
- SPRINGER
- Keywords
- Slot coating; Upstream meniscus; Dynamic contact angle; Static contact angle; Operability window
- Citation
- JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, v.15, no.5, pp.1067 - 1076
- Indexed
- SCOPUS
- Journal Title
- JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
- Volume
- 15
- Number
- 5
- Start Page
- 1067
- End Page
- 1076
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/73672
- DOI
- 10.1007/s11998-018-0059-2
- ISSN
- 1945-9645
- Abstract
- The coating bead flow and operability window for Newtonian coating liquids are theoretically and experimentally investigated in the slot coating process, with a focus on the shape of the upstream meniscus and contact angles. From the flow visualization in the coating bead region, the contact angles of the upstream meniscus were measured by changing the flow rate and web speed under uniform operating conditions. It was confirmed that the dynamic contact angle is closely related to the capillary number in this process, based on the Hoffman-Voinov-Tanner model. The viscocapillary and two-dimensional Navier-Stokes models using the experimentally observed contact angles accurately predicted the coating bead dynamics and operability windows for two Newtonian liquids.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Chemical and Biological Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.