Free-surface profile of evaporative liquids at the vicinity of the contact line / S. Houssainy in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 5 (09/2015)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 5 (09/2015) . - p. 863-867 Titre : Free-surface profile of evaporative liquids at the vicinity of the contact line Type de document : texte imprimé Auteurs : S. Houssainy, Auteur ; H. P. Kavehpour, Auteur Année de publication : 2015 Article en page(s) : p. 863-867 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Evaporation Interfaces (Sciences physiques) Ligne de contact (chimie physique) (Chimie physique) Ligne correspondant à l’intersection apparente de deux interfaces contigües. Mouillage (chimie des surfaces) Surfaces -- Analyse Index. décimale : 667.9 Revêtements et enduits Résumé : Interfacial phenomenon, specifically those associated with evaporation from thin liquid films near the contact line of a liquid drop, plays a major role in many current engineering applications which require high local heat fluxes, as evident in heat pipes, grooved evaporators, fuel cells, and suction nucleate boiling devices (Potash and Wayner in Int J Heat Mass Transf 15:1851–1863, 1971; Hanchak et al. in Int J Heat Mass Transf 75:196–206, 2014). This study will prove useful in the improvement of such applications. Fluorescence microscopy was used as our main technique for investigating the free-surface profiles of evaporative liquids at the vicinity of the contact line, as it delivers sufficient range and resolution to address the challenge of capturing the microscopic and macroscopic aspects of this phenomenon. The free-surface profiles of relatively low evaporative liquids were compared with those of nonevaporative liquids, specifically one centistoke silicon oil was compared with one hundred centistokes silicon oil and qualitatively no difference has been observed between both profiles near the contact line. DOI : 10.1007/s11998-015-9716-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9716-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24686 [article]

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Trailing edge formation during slot coating of rectangular patches / D. Maza in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 5 (09/2017) . - p. 1003-1013 Titre : Trailing edge formation during slot coating of rectangular patches Type de document : texte imprimé Auteurs : D. Maza, Auteur ; M. S. Carvalho, Auteur Année de publication : 2017 Article en page(s) : p. 1003-1013 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Eléments finis, Méthode des Enduction par filière Ligne de contact (chimie physique) (Chimie physique) Ligne correspondant à l’intersection apparente de deux interfaces contigües. Médicaments -- Administration par timbres Modèles mathématiques Index. décimale : 667.9 Revêtements et enduits Résumé : Different products, such as adhesives, pharmaceutical patches, batteries, and fuel cell membranes, require coating discrete patches onto moving substrates. For coating rectangular patches, intermittent slot die coating is the preferred method. The patches can be obtained by rapidly starting and stopping the flow out of the coating die. Controlling the flow start-up and shutdown to produce sharp and uniform leading and trailing edges of each patch is challenging. Different ways to control the liquid feeding are used to optimize the process. Even if the start-up and shutdown of the feeding system are well designed, the transient flow in the coating bead contributes to the formation of nonuniform leading and trailing edges of coated patches. In this work, we analyze how the operating conditions, die geometry, and liquid properties affect the coating bead breakup process and the trailing edge configuration. The process is directly related to the contact line dynamics. The results show that the uniformity of the trailing edge of each coated patch can be improved by changing the die shoulder angle and wetting characteristics of the die surface. DOI : 10.1007/s11998-017-9962-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9962-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29136 [article]

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