An arrangement of ideal zones with shifting ...
Document type :
Article dans une revue scientifique
Permalink :
Title :
An arrangement of ideal zones with shifting boundaries as a way to model mixing process at unsteady stirring conditions in agitated vessels
Author(s) :
Dieulot, Jean-Yves [Auteur]
Laboratoire d'Automatique, Génie Informatique et Signal [LAGIS]
Petit, Nicolas [Auteur]
Centre Automatique et Systèmes [CAS]
Rouchon, Pierre [Auteur]
Centre Automatique et Systèmes [CAS]
Delaplace, Guillaume [Auteur]
Laboratoire de Génie des Procédés et Technologie Alimentaires [LGPTA]

Laboratoire d'Automatique, Génie Informatique et Signal [LAGIS]
Petit, Nicolas [Auteur]
Centre Automatique et Systèmes [CAS]
Rouchon, Pierre [Auteur]
Centre Automatique et Systèmes [CAS]
Delaplace, Guillaume [Auteur]

Laboratoire de Génie des Procédés et Technologie Alimentaires [LGPTA]
Journal title :
Chemical Engineering Science
Volume number :
60
Pages :
5544-5554
Publisher :
Elsevier
Publication date :
2005-06-28
ISSN :
0009-2509
English keyword(s) :
Modelling
Mixing
Nonlinear dynamics
Parameter identification
Unsteady stirring
Torus model
Mixing
Nonlinear dynamics
Parameter identification
Unsteady stirring
Torus model
HAL domain(s) :
Chimie/Génie chimique
English abstract : [en]
This paper investigates the way modelling mixing phenomena occur in unsteady stirring conditions in agitated vessels. In particular, a new model of torus reactor including a well-mixed zone and a transport zone is proposed. ...
Show more >This paper investigates the way modelling mixing phenomena occur in unsteady stirring conditions in agitated vessels. In particular, a new model of torus reactor including a well-mixed zone and a transport zone is proposed. The originality of the arrangement of ideal reactors developed here lies in the time-dependent location of the boundaries between the two zones. This concept is applied to model the positive influence of unsteady stirring conditions on homogenization process: the model avoids a mass balance discontinuity when the transition from steady to unsteady stirring conditions is performed. To ascertain the reliability of the model proposed, experimental runs with highly viscous fluids have been carried out in an agitated tank. The impeller used was a non-standard helical ribbon impeller, fitted with an anchor at the bottom. The degree of homogeneity in the tank was observed using a conductivity method after a tracer injection. It is shown that for a given agitated fluid and mixing system, model parameters are easy to estimate and that modelling results are in close agreement with experimental ones. Moreover, it would appear that this model allows the easy derivation of a control law, which is a great advantage when optimizing the dynamics of a mixing process.Show less >
Show more >This paper investigates the way modelling mixing phenomena occur in unsteady stirring conditions in agitated vessels. In particular, a new model of torus reactor including a well-mixed zone and a transport zone is proposed. The originality of the arrangement of ideal reactors developed here lies in the time-dependent location of the boundaries between the two zones. This concept is applied to model the positive influence of unsteady stirring conditions on homogenization process: the model avoids a mass balance discontinuity when the transition from steady to unsteady stirring conditions is performed. To ascertain the reliability of the model proposed, experimental runs with highly viscous fluids have been carried out in an agitated tank. The impeller used was a non-standard helical ribbon impeller, fitted with an anchor at the bottom. The degree of homogeneity in the tank was observed using a conductivity method after a tracer injection. It is shown that for a given agitated fluid and mixing system, model parameters are easy to estimate and that modelling results are in close agreement with experimental ones. Moreover, it would appear that this model allows the easy derivation of a control law, which is a great advantage when optimizing the dynamics of a mixing process.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
ENSCL
Université de Lille
CNRS
INRA
Université de Lille
CNRS
INRA
Collections :
Research team(s) :
Processus aux Interfaces et Hygiène des Matériaux (PIHM)
Submission date :
2022-02-01T13:11:49Z
2022-02-02T09:17:02Z
2022-02-02T09:17:02Z