[article]
| Titre : |
Experiments on characteristic deformation and breakup behaviors of an immiscible drop in a screw channel flow |
| Type de document : |
texte imprimé |
| Auteurs : |
H. S. Jun, Auteur ; W. R. Hwang, Auteur ; T. H. Kwon, Auteur |
| Année de publication : |
2004 |
| Article en page(s) : |
p. 218-224 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
668.9 Polymères |
| Résumé : |
Deformation and breakup mechanisms of an immiscible drop were investigated experimentally in a screw channel flow, which mimics the flow in the metering section of the single screw extruder. It was observed that the deformation/breakup mechanisms are far distinct from the well-known routes for the linear flow, mainly because of the complex flow history that can be characterized by the repetition of strong/weak shear, the continuously varying shear direction and the acceleration/deceleration. The experimental observations include: cometlike thread formation with the large bulbous head and the long narrow tail; the initiation of the breakup at the entrance of the low-shear zone; breakup by asymmetric end pinching; breakup by the growth of the capillary wave, propagating from the tail toward the head; monotonically decreasing droplet size distribution from the head to tail. The mechanism for the comet-like thread formation has been investigated by using the numerically obtained flow field. |
| DOI : |
10.3139/217.1833 |
| En ligne : |
https://drive.google.com/file/d/1ZIZj_lwVKGtaKAyqcthh_hWk6mM9bqvT/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3103 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XIX, N° 3 (09/2004) . - p. 218-224
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