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Numerical simulation of a gas-liquid Rushton stirred reactor - LES and LPT

Arlov, Dragana LU ; Revstedt, Johan LU and Fuchs, Laszlo LU (2008) In Computers & Fluids 37(7). p.793-801
Abstract (Swedish)
Abstract in Undetermined

Simulations of aerated stirred reactor is performed using a combination of large eddy simulation (LES) and Lagrangian particle tracking (LPT). A single impeller Rushton turbine is positioned at the center of the reactor and air is introduced at the bottom through a circular sparger. Effects of the gas volume flow, stirrer speed and sparger dimension are investigated. The results show that the time averaged liquid velocities in radial and tangential directions decrease with increasing gas volume fraction. In the axial direction, the gas redirects the radial jet upwards, breaking the symmetry of the ring vortices. Especially, for a narrower sparger, a more concentrated tilt upwards is observed with a... (More)
Abstract in Undetermined

Simulations of aerated stirred reactor is performed using a combination of large eddy simulation (LES) and Lagrangian particle tracking (LPT). A single impeller Rushton turbine is positioned at the center of the reactor and air is introduced at the bottom through a circular sparger. Effects of the gas volume flow, stirrer speed and sparger dimension are investigated. The results show that the time averaged liquid velocities in radial and tangential directions decrease with increasing gas volume fraction. In the axial direction, the gas redirects the radial jet upwards, breaking the symmetry of the ring vortices. Especially, for a narrower sparger, a more concentrated tilt upwards is observed with a larger region of negative axial velocity. Although, low aeration number is used, the periodicity from the impeller is decreasing and interfering with the creation of the trailing vortex pair. The gas dispersion increases with decreasing the sparger diameter. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Computers & Fluids
volume
37
issue
7
pages
793 - 801
publisher
Elsevier
external identifiers
  • wos:000257017200003
  • scopus:43649108772
ISSN
0045-7930
DOI
10.1016/j.compfluid.2007.03.017
language
English
LU publication?
yes
id
be792a2f-5695-4cf2-bd7e-33c9a0b14b83 (old id 571830)
alternative location
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V26-4PT1SC3-1&_user=745831&_coverDate=10%2F01%2F2007&_alid=688942591&_rdoc=1&_fmt=full&_orig=search&_cdi=5694&_sort=d&_docanchor=&view=c&_ct=1&_acct=C000041498&_version=1&_urlVersion=0&_userid=745831&md5=43585af4a7779ab659622fac1a6b2a1e
date added to LUP
2008-02-13 09:48:20
date last changed
2017-04-09 03:46:57
@article{be792a2f-5695-4cf2-bd7e-33c9a0b14b83,
  abstract     = {<b>Abstract in Undetermined</b><br/><br>
Simulations of aerated stirred reactor is performed using a combination of large eddy simulation (LES) and Lagrangian particle tracking (LPT). A single impeller Rushton turbine is positioned at the center of the reactor and air is introduced at the bottom through a circular sparger. Effects of the gas volume flow, stirrer speed and sparger dimension are investigated. The results show that the time averaged liquid velocities in radial and tangential directions decrease with increasing gas volume fraction. In the axial direction, the gas redirects the radial jet upwards, breaking the symmetry of the ring vortices. Especially, for a narrower sparger, a more concentrated tilt upwards is observed with a larger region of negative axial velocity. Although, low aeration number is used, the periodicity from the impeller is decreasing and interfering with the creation of the trailing vortex pair. The gas dispersion increases with decreasing the sparger diameter.},
  author       = {Arlov, Dragana and Revstedt, Johan and Fuchs, Laszlo},
  issn         = {0045-7930},
  language     = {eng},
  number       = {7},
  pages        = {793--801},
  publisher    = {Elsevier},
  series       = {Computers & Fluids},
  title        = {Numerical simulation of a gas-liquid Rushton stirred reactor - LES and LPT},
  url          = {http://dx.doi.org/10.1016/j.compfluid.2007.03.017},
  volume       = {37},
  year         = {2008},
}