Liu, N;
Wang, W;
Han, J;
Zhang, M;
Angeli, P;
Wu, C;
Gong, J;
(2016)
A PIV investigation of the effect of disperse phase fraction on the turbulence characteristics of liquid-liquid mixing in a stirred tank.
Chemical Engineering Science
, 152
pp. 528-546.
10.1016/j.ces.2016.06.040.
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Abstract
In this paper, utilising 2D angle-resolved particle image velocimetry (PIV), the flow field of a dilute aqueous-in-oil dispersion is experimentally studied in a stirring tank. Opacity during liquid–liquid mixing is eliminated by matching the refractive indices of both phases. Anisotropy of the turbulence flow field is analysed via the turbulent kinetic energy (TKE) and energy dissipation rate (EDR) obtained at different measuring angles. The influence of spatial resolution is compared and discussed. TKE and EDR are observed to increase with increment of dispersed phase fraction while a small range of disorder and fluctuation is observed in the impeller region. The effect of dispersed droplets should be attributed to the strengthened fluctuation of velocities and spatial differences. Further work concerning higher resolution and the disperse fraction is necessary.
| Type: | Article |
|---|---|
| Title: | A PIV investigation of the effect of disperse phase fraction on the turbulence characteristics of liquid-liquid mixing in a stirred tank |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.ces.2016.06.040 |
| Publisher version: | http://dx.doi.org/10.1016/j.ces.2016.06.040 |
| Language: | English |
| Additional information: | © 2017. This manuscript version is published under a Creative Commons Attribution Non-commercial Non-derivative 4.0 International licence (CC BY-NC-ND 4.0). This licence allows you to share, copy, distribute and transmit the work for personal and non-commercial use providing author and publisher attribution is clearly stated. Further details about CC BY licences are available at http://creativecommons.org/licenses/by/4.0. Access may be initially restricted by the publisher. |
| Keywords: | Science & Technology, Technology, Engineering, Chemical, Engineering, Liquid-Liquid Mixing, Turbulence Characteristics, Angle-Resolved Particle Image Velocimetry, Dispersed Phase Fraction, Pitched Blade Turbine, Particle Image Velocimetry, Laser-Induced Fluorescence, Energy-Dissipation, Rushton Turbine, Doppler Anemometry, Flow Structure, Velocity, Size, Impellers |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1512922 |
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