| Titre : |
Effect of upstream meniscus shape on dynamic wetting and operating limits of Newtonian coating liquids in slot coating bead flows |
| Type de document : |
texte imprimé |
| Auteurs : |
Won-Gi Ahn, Auteur ; Si Hyung Lee, Auteur ; Jaewook Nam ; See Jo Kim ; Kwan-Young Lee ; Hyun Wook Jung |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 1067-1076 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Angle de contact
Enduction par filière
Fluides newtoniens
Mouillage (chimie des surfaces)
Revêtements
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
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. |
| Note de contenu : |
- EXPERIMENTAL SETUP : Properties of coating liquids
- NUMERICAL SIMULATIONS FOR COATING BEAD FLOWS
- RESULTS AND DISCUSSION : Operability windows by models and experiments - Observation of upstream meniscus shape - Comparison of coating bead flows from experiments and 2-D simulations - Effect of contact angles at upstream meniscus on coating bead dynamics - Effect of contact angles at upstream meniscus on operability window |
| DOI : |
10.1007/s11998-018-0059-2 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0059-2.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31133 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 5 (09/2018) . - p. 1067-1076
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Effect of upstream meniscus shape on dynamic wetting and operating limits of Newtonian coating liquids in slot coating bead flows in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 5 (09/2018)
