Cortada-Garcia, M;
Weheliye, WH;
Dore, V;
Mazzei, L;
Angeli, P;
(2018)
Computational fluid dynamic studies of mixers for highly viscous shear thinning fluids and PIV validation.
Chemical Engineering Science
, 179
pp. 133-149.
10.1016/j.ces.2018.01.010.
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Abstract
Agitation of highly viscous shear thinning fluids is normally conducted with complex impeller designs. Often, impellers almost as large as the tanks containing them and impeller blades equipped with holes are adopted in industry. In this work, we studied experimentally the main features of the flow generated by this type of impellers for a mixture of glycerol with a carbomeric gel by means of particle image velocimetry. The experiments were conducted at temperatures ranging from 40 to 60 °C and impeller speeds ranging from 40 to 140 rpm. In all cases, the flow regime was laminar or in the transition region. We also used computational fluid dynamics simulations to describe the behaviour of the mixer, validating the results experimentally with good agreement. We used the numerical results to obtain information on the performance of the mixer, determining the locations and size of vigorous agitation zones and the local effect of the holes present on the impeller blades. The power curves of the mixer were obtained, and the mixer efficiency in terms of power consumption was found to be similar to other impellers used to mix highly viscous non-Newtonian fluids.
| Type: | Article |
|---|---|
| Title: | Computational fluid dynamic studies of mixers for highly viscous shear thinning fluids and PIV validation |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.ces.2018.01.010 |
| Publisher version: | http://dx.doi.org/10.1016/j.ces.2018.01.010 |
| Language: | English |
| Additional information: | Copyright © 2018 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http:// creativecommons.org/licenses/by/4.0/). |
| Keywords: | PIV, CFD, Mixing tanks, Shear thinning fluids |
| 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 UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10043716 |
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