期刊
ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING
卷 13, 期 6, 页码 -出版社
WILEY
DOI: 10.1002/apj.2259
关键词
CFD simulation; dissolved oxygen in water; microbubble generator; swirling flow
资金
- Engineering and Physical Sciences Research Council [EP/P018211/1]
- EPSRC [EP/P018211/1] Funding Source: UKRI
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.
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