| Titre : |
Non-isothermal simulation of a corner vortex within entry flow for a viscoelastic fluid Huan-Chang Tseng EMAIL logo |
| Type de document : |
texte imprimé |
| Auteurs : |
Huan-Chang Tseng, Auteur |
| Année de publication : |
2023 |
| Article en page(s) : |
p. 362-374 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Etat fondu (matériaux)
Polyéthylène basse densité
Rhéologie
Simulation par ordinateur
|
| Tags : |
'Simulation numérique 3D' 'Vortex de coin' 'Flux d'entrée' 'Modèle White-Metzner modifié' non isotherme' 'Fluides viscoélastiques |
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
A modified White-Metzner viscoelastic constitutive equation is incorporated into the state-of-the-art Three Dimensional Computational Fluid Dynamics (3D-CFD) framework for performing isothermal and non-isothermal entry flow simulations of a polymer melt. As a result, the corner vortex becomes smaller with increased isothermal temperature, namely, the so-called temperature-induced vortex reduction. In addition, the vortex grows with raising wall temperatures, whereas the vortex reduction is found under high inlet temperatures. Through the visualized flow patterns, it is significant to investigate the dramatic variations of vortex size in relation to fluid temperature, weighted viscosity and extension rate, as well as Weissenberg number and Trouton ratio. |
| Note de contenu : |
- THEORETICAL BACKGROUND : GNF shear viscosity - GNF-X weighted shear/extensional viscosity - WMT-X viscoelastic constitutive equation
- RESULTS AND DISCUSSION : Fit of WMT-X model to viscoelastic material functions - Temperature induced vortex reduction within isothermal entry flow - Simulations of non-isothermal entry flow with vortex streamline
- Table 1 : Shear viscosity parameters of Cross-WLF model for LDPE melt
- Table 2 : Extensional viscosity parameters of Trouton ratio of GNF-X model for LDPE melt
- Table 3 : N 1 parameters of Weissenberg number of WMT-X model for LDPE melt
- Table 4 : -N 2/N 1 ratio parameters of WMT-X model for LDPE melt |
| DOI : |
https://doi.org/10.1515/ipp-2022-4312 |
| En ligne : |
https://drive.google.com/file/d/1ftb1rtH9JYA2Lsi7n9bhLsQcRctU6-zO/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39698 |
in INTERNATIONAL POLYMER PROCESSING > Vol. 38, N° 3 (2023) . - p. 362-374
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