| Titre : |
Transient response of slot coating flows of shear-thinning fluids to periodic disturbances |
| Type de document : |
texte imprimé |
| Auteurs : |
Semi Lee, Auteur ; Jaewook Nam, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 981-990 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Cisaillement (mécanique)
Enduction par filière
Fluide de CarreauLe fluide de carreau est un type de fluide newtonien généralisé où la viscosité, dépend du taux de cisaillement.
Rhéologie
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Slot coating is a popular coating method, in which the film thickness is precisely controlled by adjusting the flow rate and production speed. When the coating flow undergoes small-scale disturbances generated by rotating elements such as motors, pumps, or uneven rolls, the downstream meniscus fluctuates, which causes film thickness variation in the flow direction. Although most coating liquids including polymeric and particulate solutions exhibit a shear-thinning rheological property, their effect on transient coating flow behaviors is not deeply understood. Here, the effect of shear-thinning property on film thickness variation under different disturbances is investigated using a computer-aided analysis of transient slot coating flow. In this study, the Carreau model is used to describe the shear-thinning property, and four different disturbances are considered. |
| Note de contenu : |
- Governing equations and boundary conditions
- Material properties and operating conditions
- Results and discussion : Disturbance strongly sensitive to the shear-thinning property : the coating gap - Disturbance weakly sensitive to the shear-thinning property
- Final remarks
- Appendix : Development of the parabolic velocity profile for carreau fluids - Dependence of film thickness variation on the upstream bead size under vacuum disturbance |
| DOI : |
10.1007/s11998-017-9952-3 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9952-3.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29127 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 5 (09/2017) . - p. 981-990
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Transient response of slot coating flows of shear-thinning fluids to periodic disturbances in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
