Cagney, N;
Balabani, S;
(2019)
Influence of Shear‐Thinning Rheology on the Mixing Dynamics in Taylor‐Couette Flow.
Chemical Engineering & Technology
, 42
(8)
pp. 1680-1690.
10.1002/ceat.201900015.
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Abstract
Non‐Newtonian rheology can have a significant effect on mixing efficiency, which remains poorly understood. The effect of shear‐thinning rheology in a Taylor‐Couette reactor is studied using a combination of particle image velocimetry and flow visualization. Shear‐thinning is found to alter the critical Reynolds numbers for the formation of Taylor vortices and the higher‐order wavy instability, and is associated with an increase in the axial wavelength. Strong shear‐thinning and weak viscoelasticity can also lead to sudden transitions in wavelength as the Reynolds number is varied. Finally, it is shown that shear‐thinning causes an increase in the mixing time within vortices, due to a reduction in their circulation, but enhances the axial dispersion of fluid in the reactor.
| Type: | Article |
|---|---|
| Title: | Influence of Shear‐Thinning Rheology on the Mixing Dynamics in Taylor‐Couette Flow |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/ceat.201900015 |
| Publisher version: | https://doi.org/10.1002/ceat.201900015 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Mixing, Non‐Newtonian fluids, Viscoelasticity, Viscosity |
| 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 Mechanical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10078090 |
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