Titre :

Dimensional analysis for planetary mixer: Modified power and Reynolds numbers

Auteur(s) :

Delaplace, Guillaume [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Guérin, Romuald [Auteur]
Institut National de la Recherche Agronomique [INRA]
Laboratoire de Génie des Procédés et Technologie Alimentaires [LGPTA]
Leuliet, J. C. [Auteur]
Laboratoire de Génie des Procédés et Technologie Alimentaires [LGPTA]
Guérin, Romuald [Auteur]

Titre de la revue :

AIChE Journal

Nom court de la revue :

AIChE J.

Numéro :

51

Pagination :

3094-3100

Éditeur :

Wiley

Date de publication :

2005-08-29

ISSN :

0001-1541

Discipline(s) HAL :

Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Physique [physics]/Matière Condensée [cond-mat]/Matière Molle [cond-mat.soft]
Sciences de l'ingénieur [physics]/Génie des procédés
Sciences du Vivant [q-bio]/Ingénierie des aliments
Sciences du Vivant [q-bio]/Biochimie, Biologie Moléculaire/Biologie moléculaire

Résumé en anglais : [en]

Mixing times, power consumption, heat transfer, and scale-up predictions in an agitated vessel require the use of correlations between dimensionless groups such as Prandtl, Nusselt, Power, and Reynolds numbers. These ...
Lire la suite >Mixing times, power consumption, heat transfer, and scale-up predictions in an agitated vessel require the use of correlations between dimensionless groups such as Prandtl, Nusselt, Power, and Reynolds numbers. These dimensionless numbers are now well established for an agitated vessel equipped with a vertically and centrally mounted impeller in the tank for both Newtonian and non-Newtonian fluids. To our knowledge, there is more ambiguity as to the definition of the characteristic speed and dimensions, which should be taken into account in the dimensional analysis of planetary mixers. The aim of this paper is twofold: (1) to propose modified Reynolds and Power numbers for planetary mixers and (2) to ascertain the reliability of the modified dimensionless number proposed for a particular planetary mixer, The TRIAXE®, which uses a combination of rotation and gyration of a pitched blade turbine to achieve mixing. The modified Reynolds and Power numbers proposed involve the maximum tip speed as characteristic velocity and are consistent with the definition of traditional Reynolds and Power numbers when only a single revolution around the vertical axis of the mixing device occurs in the vessel, as is the case for a standard mixing system. Experimental power measurements carried out with a planetary mixer when mixing highly viscous Newtonian fluids show that the modified Reynolds and Power numbers proposed succeed in obtaining a unique power curve for the mixing system independently of the speed ratio. This close agreement proves that the modified Reynolds and Power numbers are well adapted for engineering purposes and can be used to compare the power-consumption performances of planetary mixers with well-established technologies.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS
INRA
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Processus aux Interfaces et Hygiène des Matériaux (PIHM)

Date de dépôt :

2022-02-01T08:44:57Z
2022-02-02T13:40:33Z