Titre :

Power consumption of a double ribbon impeller with newtonian and shear thinning fluids and during the gelation of a iota-carrageenan solution

Auteur(s) :

Maingonnat, J.F. [Auteur]
Doublier, J.L. [Auteur]
Lefebvre, J. [Auteur]
Delaplace, Guillaume [Auteur]
Laboratoire de Génie des Procédés et Technologie Alimentaires [LGPTA]

Titre de la revue :

Journal of Food Engineering

Numéro :

87

Pagination :

82-90

Éditeur :

Elsevier

Date de publication :

2008-07

ISSN :

0260-8774

Mot(s)-clé(s) en anglais :

Rheology
Mixing
Gelation
Power consumption
Ribbon impeller

Discipline(s) HAL :

Sciences du Vivant [q-bio]
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]

The power consumption of a double ribbon impeller (EKATO-PARAVISC ® ) is studied as a function of the operating conditions and the rheological behaviour of the experimental fluids. The isothermal experiments carried out ...
Lire la suite >The power consumption of a double ribbon impeller (EKATO-PARAVISC ® ) is studied as a function of the operating conditions and the rheological behaviour of the experimental fluids. The isothermal experiments carried out with newtonian fluids gave the power curve for purely laminar and transitional flow regimes and the Kp factor was determined for the laminar flow regime. The isothermal experiments with two shear thinning fluids and the application of the Metzner and Otto concept led to the determination of the Ks factor. The experimental values of the Kp and Ks factors are in a close agreement with previous works carried on this type of equipment.The viscous behaviour of the gelling fluid (an iota-carrageenan solution) was determined with flow curves obtained under constant temperature/variable shear rate (CT/VSR) tests and under variable temperature/constant shear rate (VT/CSR) tests. The viscosities obtained with the VT–CSR tests were lower than the viscosities obtained with CT–VSR probably due to the difference in structure when the solution is gelling under shear rate. Experimental models are proposed for both viscous behaviours. The viscoelastic properties of the iota-carrageenan were characterized by using small amplitude oscillatory frequency sweeps at different temperatures. These experiments led to the determination of a gelling temperature.The experiments carried out when cooling the gelling fluid showed that the corresponding increase in the torque is quite similar to the results obtained with the rheological VT–CSR tests. Moreover when applying the Metzner and Otto concept to the previously determined Kp and Ks factors and the VT–CSR viscosity models, the power consumption can be predicted with a ±20% accuracy.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 :

2022-02-01T13:38:36Z
2022-02-01T15:40:26Z