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A mixing study in a double-Rushton stirred tank

Zadghaffari, R.; Moghaddas, J. S. and Revstedt, Johan LU (2009) In Computers & Chemical Engineering 33(7). p.1240-1246
Abstract
Computational and experimental methods have been used to investigate the flow field, power and mixing time in a fully baffled stirred vessel with two six-blade Rushton turbines. Flow in a stirred tank involves interactions between flow around rotating impeller blades and stationary baffles. In computational fluid dynamics (CFD), the flow field was developed using the sliding mesh (SM) approach. The large eddy simulation (LES) was used to model the turbulence. For validation of simulation results two series of experiments were performed: (i) velocity measurements of the liquid phase using particle image velocimetry (PIV) and (ii) concentration measurements of the determining tracer in the liquid phase using the planar laser-induced... (More)
Computational and experimental methods have been used to investigate the flow field, power and mixing time in a fully baffled stirred vessel with two six-blade Rushton turbines. Flow in a stirred tank involves interactions between flow around rotating impeller blades and stationary baffles. In computational fluid dynamics (CFD), the flow field was developed using the sliding mesh (SM) approach. The large eddy simulation (LES) was used to model the turbulence. For validation of simulation results two series of experiments were performed: (i) velocity measurements of the liquid phase using particle image velocimetry (PIV) and (ii) concentration measurements of the determining tracer in the liquid phase using the planar laser-induced fluorescence (PLIF) technique. In each series three different rotational speeds of impellers: 225, 300 and 400 rpm were employed. The stirring power input was also calculated based on the PIV results. A considerable reduction in mixing time was achieved and stirring power input was increased by increasing the impeller speed. The satisfactory comparisons indicate the potential usefulness of this CFD approach as a computational tool for designing stirred reactors. (C) 2009 Elsevier Ltd. All rights reserved (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
PIV, CFD, Mixing time, LES, Power, Stirred tank
in
Computers & Chemical Engineering
volume
33
issue
7
pages
1240 - 1246
publisher
Elsevier
external identifiers
  • wos:000267099500003
  • scopus:67349285786
ISSN
1873-4375
DOI
10.1016/j.compchemeng.2009.01.017
language
English
LU publication?
yes
id
a34c7835-3b68-442f-a6e3-fe6176626f63 (old id 1441705)
date added to LUP
2009-07-27 15:26:16
date last changed
2017-11-05 04:03:07
@article{a34c7835-3b68-442f-a6e3-fe6176626f63,
  abstract     = {Computational and experimental methods have been used to investigate the flow field, power and mixing time in a fully baffled stirred vessel with two six-blade Rushton turbines. Flow in a stirred tank involves interactions between flow around rotating impeller blades and stationary baffles. In computational fluid dynamics (CFD), the flow field was developed using the sliding mesh (SM) approach. The large eddy simulation (LES) was used to model the turbulence. For validation of simulation results two series of experiments were performed: (i) velocity measurements of the liquid phase using particle image velocimetry (PIV) and (ii) concentration measurements of the determining tracer in the liquid phase using the planar laser-induced fluorescence (PLIF) technique. In each series three different rotational speeds of impellers: 225, 300 and 400 rpm were employed. The stirring power input was also calculated based on the PIV results. A considerable reduction in mixing time was achieved and stirring power input was increased by increasing the impeller speed. The satisfactory comparisons indicate the potential usefulness of this CFD approach as a computational tool for designing stirred reactors. (C) 2009 Elsevier Ltd. All rights reserved},
  author       = {Zadghaffari, R. and Moghaddas, J. S. and Revstedt, Johan},
  issn         = {1873-4375},
  keyword      = {PIV,CFD,Mixing time,LES,Power,Stirred tank},
  language     = {eng},
  number       = {7},
  pages        = {1240--1246},
  publisher    = {Elsevier},
  series       = {Computers & Chemical Engineering},
  title        = {A mixing study in a double-Rushton stirred tank},
  url          = {http://dx.doi.org/10.1016/j.compchemeng.2009.01.017},
  volume       = {33},
  year         = {2009},
}