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Analysis of an unsteady quasi-capillary channel flow with time-resolved PIV and RBF-based super-resolution in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 1 (01/2023)
[article]
Titre : Analysis of an unsteady quasi-capillary channel flow with time-resolved PIV and RBF-based super-resolution Type de document : texte imprimé Année de publication : 2023 Article en page(s) : p. Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact
Ecoulement capillaire
Interfaces solide-liquide
Mesure
Modèles mathématiques
Mouillage (chimie des surfaces)Tags : 'Canal quasi capillaire instable' 'PIV résolu en temps' 'Super résolution RBF' 'Angles de contact dynamiques' 'Mouillage dynamique' Index. décimale : 667.9 Revêtements et enduits Résumé : We investigate the interface dynamics in an unsteady quasi-capillary channel flow. The configuration consists of a liquid column that moves along a vertical 2D channel, open to the atmosphere and driven by a controlled pressure head. Both advancing and receding contact lines were analyzed to test the validity of classic models for dynamic wetting and to study the flow field near the interface. The operating conditions are characterized by a large acceleration, thus dominated by inertia. The shape of the moving meniscus was retrieved using Laser-Induced Fluorescence-based image processing, while the flow field near was analyzed via Time-Resolved Particle Image Velocimetry (TR-PIV). The TR-PIV measurements were enhanced in the post-processing, using a combination of Proper Orthogonal Decomposition and Radial Basis Functions to achieve super-resolution of the velocity field. Large counter-rotating vortices were observed, and their evolution was monitored in terms of the maximum intensity of the Q-field. The results show that classic contact angle models based on interface velocity cannot describe the evolution of the contact angle at a macroscopic scale. Moreover, the impact of the interface dynamics on the flow field is considerable and extends to several capillary lengths below the interface. Note de contenu : - EXPERIMENTAL SETUP AND TEST CASES : Modeling and parameter definition - Experimental conditions and test cases
- MEASUREMENT TECHNIQUES : LIF visualization : setup and processing - TR-PIV : setup - Super-resolution of PIV fields
- RESULTS : LIF visualization results - TR-PIV experiment results
- Table 1 : Experiments in the LIF-based visualization
- Table 2 : Experiments in the TR-PIV campaignDOI : https://doi.org/10.1007/s11998-022-00664-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00664-4.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38827
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 1 (01/2023) . - p.[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23928 - Périodique Bibliothèque principale Documentaires Disponible Effect of turnover rate on the change of concentration of an unstable compound in a dip coating bath / Tatsuo Sato in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 906 (07/2000)
[article]
Titre : Effect of turnover rate on the change of concentration of an unstable compound in a dip coating bath Type de document : texte imprimé Auteurs : Tatsuo Sato, Auteur Année de publication : 2000 Article en page(s) : p. 81-83 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dip-coating Tags : Peinturage 'Au trempé' 'Composition chimique' Modification 'Composé instable' Index. décimale : 667.9 Revêtements et enduits Résumé : The effect of turnover rate on the change of concentration of unstable (degradable) compounds in a dip coating bath during a continuous coating process was theoretically calculated as a function of the degradation rate of the compound. It is assumed that the bath is replenished by the same coating material as that in the original bath to maintain the volume of the material in the bath constant. The results show that the fraction of the unstable compound in the bath at the end of the nth day is given by formula math where t is the number of days for one turnover and formula math where P is the fraction of the compound remaining undegraded in the bath per day. The equilibrium fraction of the compound after infinite coating days is given by formula math The concentration of the compound in the replenishing material (Cr) to maintain the original concentration in the bath (Co) constant is given by formula math. Note de contenu : - COMPUTATION : Change of the concentration of unstable compounds in a dip coating bath with time - Equilibrium concentration of the compound - Concentration of the compound - Concentration of the compound in replenishing coating material to maintain the concentration in the bath constant
- RESULTS AND DISCUSSIONPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18023
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 72, N° 906 (07/2000) . - p. 81-83[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001211 - Périodique Bibliothèque principale Documentaires Disponible