Basso, Alessio and Hamad, F.A. and Ganesan, Poo Balan (2018) Effects of the geometrical configuration of air–water mixer on the size and distribution of microbubbles in aeration systems. Asia-Pacific Journal of Chemical Engineering, 13 (6). e2259. ISSN 1932-2135, DOI https://doi.org/10.1002/apj.2259.
Full text not available from this repository.Abstract
The objective of this work is to present a novel geometrical configuration for microbubble generators (MBGs) to improve dissolved-oxygen levels in water. Among various methodologies from the literature, Orifice and Venturi tubes have been considered as baseline cases. Experimental data from the literature are used to verify a computational fluid dynamics (CFD) case developed for a better understanding of the dynamics of MBGs. As a result, the validated CFD setup has been implemented on a modified Venturi-type generator, where air is injected coaxially with respect to the tube axis, whereas a helicoid wall at variable pitch angle is used. Results show a reduction in the mean bubble diameter distribution from the baseline Venturi tubes, particularly, at low-speed inlet velocities. This is of interest, especially to decrease the energy requirement for most common water aeration systems.
| Item Type: | Article |
|---|---|
| Funders: | Engineering and Physical Sciences Research Council under the grant agreement no. EP/P018211/1, in collaboration between Teesside University, UK, and University of Malaya, Malaysia |
| Uncontrolled Keywords: | CFD simulation; dissolved oxygen in water; microbubble generator; swirling flow |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Faculty of Engineering |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 13 Sep 2019 06:18 |
| Last Modified: | 13 Sep 2019 06:18 |
| URI: | http://eprints.um.edu.my/id/eprint/22336 |
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