Jiang, Shuxian;
Coppens, Marc-Olivier;
Wang, Jiajun;
(2022)
Intensification of liquid mixing and local turbulence using a fractal injector with staggered conformation.
Chemical Engineering and Processing - Process Intensification
, Article 109042. 10.1016/j.cep.2022.109042.
(In press).
Preview |
Text
Coppens_Intensification of liquid mixing and local turbulence using a fractal injector with staggered conformation_pre-proof.pdf - Accepted Version Download (2MB) | Preview |
Abstract
Two self-similar, tree-like injectors of the same fractal dimension are compared, demonstrating that other geometric parameters besides dimension play a crucial role in determining mixing performance. In one injector, when viewed from the top, the conformation of branches is eclipsed; in the other one, it is staggered. The flow field and the fractal injector induced mixing performance are investigated through computational fluid dynamics (CFD) simulations. The finite rate/eddy dissipation model (FR/EDM) is modified for fast liquid-phase reactions involving local micromixing. Under the same operating conditions, flow field uniformity and micromixing are improved when a staggered fractal injector is used. This is because of enhanced jet entrainment and local turbulence around the spatially distributed nozzles. Compared with a traditional double-ring sparger, a larger reaction region volume and lower micromixing time are obtained with fractal injectors. Local turbulence around the spatially distributed nozzles in fractal injectors improves reaction efficiency.
| Type: | Article |
|---|---|
| Title: | Intensification of liquid mixing and local turbulence using a fractal injector with staggered conformation |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.cep.2022.109042 |
| Publisher version: | https://doi.org/10.1016/j.cep.2022.109042 |
| Language: | English |
| Additional information: | © 2022 Published by Elsevier Ltd. This is an open access article under the CC BY 4.0 license Attribution 4.0 International (https://creativecommons.org/licenses/by/4.0/) |
| Keywords: | fractal, turbulence, mixing, computational fluid dynamics (CFD), process intensification, multiphase reactions |
| UCL classification: | 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 UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10151233 |
Archive Staff Only
 |
View Item |
