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Velocity Measurements of Turbulent Two-Phase Flow in a High-Pressure Homogenizer Model

Håkansson, Andreas LU ; Fuchs, Laszlo LU ; Innings, Fredrik LU ; Revstedt, Johan LU ; Trägårdh, Christian LU and Bergenståhl, Björn LU (2013) In Chemical Engineering Communications 200(1). p.93-114
Abstract
The effect of disperse phase volume fraction on the turbulence in a scale model of a high-pressure homogenizer was studied experimentally. Velocity fields of the continuous phase were measured using particle image velocimetry. Refractive index matching combined with digital filtering enabled measurement with disperse phase present. Geometry and physical properties were carefully scaled in order to ensure turbulent flow and disperse phase modulation comparable to that of a technical high-pressure homogenizer. The results show a widening of the jet downstream of the gap and increased Reynolds stresses in the region of high turbulence intensity. This is consistent with previous experiments under similar conditions. Furthermore, the spectra of... (More)
The effect of disperse phase volume fraction on the turbulence in a scale model of a high-pressure homogenizer was studied experimentally. Velocity fields of the continuous phase were measured using particle image velocimetry. Refractive index matching combined with digital filtering enabled measurement with disperse phase present. Geometry and physical properties were carefully scaled in order to ensure turbulent flow and disperse phase modulation comparable to that of a technical high-pressure homogenizer. The results show a widening of the jet downstream of the gap and increased Reynolds stresses in the region of high turbulence intensity. This is consistent with previous experiments under similar conditions. Furthermore, the spectra of turbulent kinetic energy were investigated, indicating that the increase in turbulent kinetic energy is mainly due to an increase in energy of eddies of large length scales. (Less)
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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Emulsification, High-pressure homogenization, Multiphase flows, Particle, image velocimetry, Turbulence
in
Chemical Engineering Communications
volume
200
issue
1
pages
93 - 114
publisher
Taylor & Francis
external identifiers
  • wos:000310604500006
  • scopus:84867262590
ISSN
1563-5201
DOI
10.1080/00986445.2012.691921
language
English
LU publication?
yes
id
854764d8-eb6a-4be4-9f15-36893bbc0d00 (old id 3401259)
date added to LUP
2016-04-01 10:11:33
date last changed
2023-09-13 20:21:15
@article{854764d8-eb6a-4be4-9f15-36893bbc0d00,
  abstract     = {{The effect of disperse phase volume fraction on the turbulence in a scale model of a high-pressure homogenizer was studied experimentally. Velocity fields of the continuous phase were measured using particle image velocimetry. Refractive index matching combined with digital filtering enabled measurement with disperse phase present. Geometry and physical properties were carefully scaled in order to ensure turbulent flow and disperse phase modulation comparable to that of a technical high-pressure homogenizer. The results show a widening of the jet downstream of the gap and increased Reynolds stresses in the region of high turbulence intensity. This is consistent with previous experiments under similar conditions. Furthermore, the spectra of turbulent kinetic energy were investigated, indicating that the increase in turbulent kinetic energy is mainly due to an increase in energy of eddies of large length scales.}},
  author       = {{Håkansson, Andreas and Fuchs, Laszlo and Innings, Fredrik and Revstedt, Johan and Trägårdh, Christian and Bergenståhl, Björn}},
  issn         = {{1563-5201}},
  keywords     = {{Emulsification; High-pressure homogenization; Multiphase flows; Particle; image velocimetry; Turbulence}},
  language     = {{eng}},
  number       = {{1}},
  pages        = {{93--114}},
  publisher    = {{Taylor & Francis}},
  series       = {{Chemical Engineering Communications}},
  title        = {{Velocity Measurements of Turbulent Two-Phase Flow in a High-Pressure Homogenizer Model}},
  url          = {{http://dx.doi.org/10.1080/00986445.2012.691921}},
  doi          = {{10.1080/00986445.2012.691921}},
  volume       = {{200}},
  year         = {{2013}},
}