Stirred tanks; Hydrodynamics; Mass transfer; Mixing; Free surface; CFD
Abstract :
[en] The present work presents CFD simulations of hydrodynamics, mixing and mass transfer in a surface-aerated baffled stirred tank. The modelling of the multiphase flow is realized via an Euler-Euler approach. Three closure models are tested for the resolution of the RANS equations. When fully-developed flow field is reached, gas-liquid transfer is implemented with a local mass transfer coefficient estimated by the eddy cell model, and the temporal evolution of dissolved gas concentration is predicted.Hydrodynamic and mixing quantities as well as mass transfer parameters for the different turbulence models are compared with experimental data available for the same geometrical and operating features. A critical analysis of the prediction results allow to assess the models capabilities and to highlight the possible critical issues of the simulations.
Disciplines :
Chemical engineering
Author, co-author :
de Lamotte, Anne ; Université de Liège > Département de chimie appliquée > Génie de la réaction et des réacteurs chimiques
Delafosse, Angélique ; Université de Liège > Département de chimie appliquée > Génie de la réaction et des réacteurs chimiques
Calvo, Sébastien ; Université de Liège > Département de chimie appliquée > Génie chimique - Nanomatériaux et interfaces
Collignon, Marie-Laure ; Université de Liège > Département de chimie appliquée > Département de chimie appliquée
Toye, Dominique ; Université de Liège > Département de chimie appliquée > Génie de la réaction et des réacteurs chimiques
Language :
English
Title :
Hydrodynamics, mixing and mass transfer in baffled stirred tanks
Publication date :
June 2015
Event name :
15th European Conference on Mixing
Event place :
Saint-Petersburg, Russia
Event date :
from June 28th 2015 to July 3rd 2015
Audience :
International
Main work title :
Proceedings of the 15th European Conference on Mixing
