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|Title: ||Application of flourescent PIV and digital image analysis to measure turbulence properties of solid-liquid stirred suspensions|
|Authors: ||Unadkat, Heema|
Rielly, Chris D.
Hargrave, Graham K.
Nagy, Zoltan K.
Particle image velocimetry
|Issue Date: ||2009|
|Publisher: ||Elsevier / © The Institution of Chemical Engineers|
|Citation: ||UNADKAT, H. ... et al, 2009. Application of flourescent PIV and digital image analysis to measure turbulence properties of solid-liquid stirred suspensions. Chemical Engineering Research and Design, 87 (4), pp. 573-586|
|Abstract: ||This study describes an experimental technique which combines Fluorescent Particle Image Velocimetry (FPIV) and
digital image analysis, to quantify the hydrodynamics of a solid–liquid suspension stirred by a 45◦ pitched-blade
turbine impeller. Soda-lime glass spheres of 1000 m diameter were employed for the dispersed phase, with up
to volumetric concentrations of 0.5 vol% in water. The magnitude of the continuous phase mean velocity did not
change significantly in the impeller jet or bulk flow, with the addition of up to 0.5 vol% dispersed phase. Turbulence
levels of the continuous phase, in terms of rms velocities, turbulent kinetic energy and dissipation rate decreased
above particle concentrations of 0.2 vol%, and the level of turbulence suppression remained constant up to 0.5 vol%.
Continuous phase integral length scales remained unchanged in the presence of solids. The locally averaged particle
concentration field showed high concentrations above and below the impeller and at the corner of the vessel base,
extending up to the vessel wall. Particle turbulence levels measured at 0.5 vol% dispersed phase were lower than the
corresponding continuous phase.|
|Description: ||This article was published in the journal, Chemical Engineering Research and Design [© The Institution of Chemical Engineers ] and the definitive version is available at: http://www.elsevier.com/wps/find/journaldescription.cws_home/713871/description#description|
|Version: ||Accepted for publication|
|Appears in Collections:||Published Articles (Chemical Engineering)|
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