| Titre : |
Three-dimensional simulation of capillary rheometry for an estimation of extensional viscosity |
| Type de document : |
texte imprimé |
| Auteurs : |
Huan-Chang Tseng, Auteur |
| Année de publication : |
2023 |
| Article en page(s) : |
p. 190-199 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Composites thermoplastiques
Rhéologie
Viscosité élongationnelleLa viscosité élongationnelle est la viscosité apparaissant lorsqu’une contrainte élongationnelle est appliquée au fluide. (Wikipedia)
|
| Tags : |
'Rhéomètre capillaire' 'Approche de Cogswell' 'Viscosité extensionnelle' 'Modèle GNF-X' 'Chute pression' 'Simulation d'écoulement en trois dimensions' |
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
It is difficult to directly measure the steady extensional viscosity of thermoplastic composite materials, especially at high extension rates. The famous Cogswell method was derived analytically from the pressure drop of entrance flow in commercial capillary rheometers for estimating the extensional viscosity. However, using Cogswell´s extensional viscosity has always resulted in over-predictions of pressure drop. Recently, the GNF-X (eXtended Generalized Newtonian Fluid) model with a weighted shear/extensional viscosity was proposed to show the typical extension-induced vortex growth in entrance flow simulations. Under given various values of Trouton’s ratio for extensional viscosity, the GNF-X model is introduced to perform three-dimensional flow simulations of capillary rheometry over a range of apparent shear rates. The difference between the predicted pressure drops and the relevant experimental data is minimized such that the estimation of extensional viscosity is optimized herein. |
| Note de contenu : |
- Table 1 : Carreau model parameters for shear viscosity of a SBR compound at 80 °C
- Table 2 : Trouton ratio parameters for extensional viscosity of a SBR compound at 80 °C
- Table 3 : Carreau model parameters for shear viscosity of a SBR compound at 100 °C
- Table 4 : Trouton ratio parameters for extensional viscosity of a SBR compound at 100 °C |
| DOI : |
https://doi.org/10.1515/ipp-2022-4280 |
| En ligne : |
https://drive.google.com/file/d/1lUowuL5AAB6Hozs1ZLx1hBJ9z0TW8JIH/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39509 |
in INTERNATIONAL POLYMER PROCESSING > Vol. 38, N° 2 (2023) . - p. 190-199
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Three-dimensional simulation of capillary rheometry for an estimation of extensional viscosity in INTERNATIONAL POLYMER PROCESSING, Vol. 38, N° 2 (2023)
