Parametric analysis of venturi-type microbubble generator and the bubble fragmentation dynamics
Venturi-type tubes facilitate efficient microbubble generation, enhancing gas-liquid mixing, mass transfer, and reactions in wastewater treatment. However, the demand for high transfer efficiency with low energy consumption necessitates advancements in the parametric analysis of generators. This stu...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-04-01
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| Series: | Desalination and Water Treatment |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1944398625001328 |
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| author | Yi Zhou Jingyu Cui Zhen Chen Jiancong Liu Lipeng He Wei Fan Mingxin Huo |
| author_facet | Yi Zhou Jingyu Cui Zhen Chen Jiancong Liu Lipeng He Wei Fan Mingxin Huo |
| author_sort | Yi Zhou |
| collection | DOAJ |
| description | Venturi-type tubes facilitate efficient microbubble generation, enhancing gas-liquid mixing, mass transfer, and reactions in wastewater treatment. However, the demand for high transfer efficiency with low energy consumption necessitates advancements in the parametric analysis of generators. This study presents a novel microbubble generator that integrates a suction chamber with a Venturi system. Through a comprehensive analysis of suction performance, gas-phase transport modes, and bubble collapse kinetics, we analyzed structural parameters using computational fluid dynamics simulations. The effective design features a centrally positioned nozzle, an air inlet at 2 mm depth, and a 12.5° divergence angle. Simulations indicated that a single bubble at the throat of the generator undergoes significant kinetic energy reduction and pressure energy increase in the expansion section, leading to pronounced tearing and deformation from inhomogeneous turbulence, resulting in smaller bubbles reduced to approximately 1/20 of their initial volume. Based on these analysis results, a laboratory-scale bubble generator was constructed, with flow tests demonstrating bubble sizes under 300 μm. Notably, the dissolved oxygen concentration in water treated by the generator was 12.6 % above the saturated level, showcasing superior oxygen enrichment compared to traditional aeration methods. This study provides valuable insights for advancing micro- and nano-bubble generation technologies. |
| format | Article |
| id | doaj-art-e49589fa1d5d41eba51bbd65fd6d48cc |
| institution | Kabale University |
| issn | 1944-3986 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Desalination and Water Treatment |
| spelling | doaj-art-e49589fa1d5d41eba51bbd65fd6d48cc2025-08-20T03:24:45ZengElsevierDesalination and Water Treatment1944-39862025-04-0132210111610.1016/j.dwt.2025.101116Parametric analysis of venturi-type microbubble generator and the bubble fragmentation dynamicsYi Zhou0Jingyu Cui1Zhen Chen2Jiancong Liu3Lipeng He4Wei Fan5Mingxin Huo6School of Environment, Northeast Normal University, 2555 Jingyue Street, Changchun 130117, ChinaSchool of Environment, Northeast Normal University, 2555 Jingyue Street, Changchun 130117, ChinaSchool of Environment, Northeast Normal University, 2555 Jingyue Street, Changchun 130117, ChinaLversheng (Chongqing) Environmental Technology Co., Ltd., Chongqing, ChinaSchool of Mechatronic Engineering, Changchun University of Technology, Changchun 130012, ChinaSchool of Environment, Northeast Normal University, 2555 Jingyue Street, Changchun 130117, China; Corresponding author.School of Environment, Northeast Normal University, 2555 Jingyue Street, Changchun 130117, ChinaVenturi-type tubes facilitate efficient microbubble generation, enhancing gas-liquid mixing, mass transfer, and reactions in wastewater treatment. However, the demand for high transfer efficiency with low energy consumption necessitates advancements in the parametric analysis of generators. This study presents a novel microbubble generator that integrates a suction chamber with a Venturi system. Through a comprehensive analysis of suction performance, gas-phase transport modes, and bubble collapse kinetics, we analyzed structural parameters using computational fluid dynamics simulations. The effective design features a centrally positioned nozzle, an air inlet at 2 mm depth, and a 12.5° divergence angle. Simulations indicated that a single bubble at the throat of the generator undergoes significant kinetic energy reduction and pressure energy increase in the expansion section, leading to pronounced tearing and deformation from inhomogeneous turbulence, resulting in smaller bubbles reduced to approximately 1/20 of their initial volume. Based on these analysis results, a laboratory-scale bubble generator was constructed, with flow tests demonstrating bubble sizes under 300 μm. Notably, the dissolved oxygen concentration in water treated by the generator was 12.6 % above the saturated level, showcasing superior oxygen enrichment compared to traditional aeration methods. This study provides valuable insights for advancing micro- and nano-bubble generation technologies.http://www.sciencedirect.com/science/article/pii/S1944398625001328Venturi-type bubble generatorBubble fragmentationMicrobubbleComputational Fluid Dynamics simulation |
| spellingShingle | Yi Zhou Jingyu Cui Zhen Chen Jiancong Liu Lipeng He Wei Fan Mingxin Huo Parametric analysis of venturi-type microbubble generator and the bubble fragmentation dynamics Desalination and Water Treatment Venturi-type bubble generator Bubble fragmentation Microbubble Computational Fluid Dynamics simulation |
| title | Parametric analysis of venturi-type microbubble generator and the bubble fragmentation dynamics |
| title_full | Parametric analysis of venturi-type microbubble generator and the bubble fragmentation dynamics |
| title_fullStr | Parametric analysis of venturi-type microbubble generator and the bubble fragmentation dynamics |
| title_full_unstemmed | Parametric analysis of venturi-type microbubble generator and the bubble fragmentation dynamics |
| title_short | Parametric analysis of venturi-type microbubble generator and the bubble fragmentation dynamics |
| title_sort | parametric analysis of venturi type microbubble generator and the bubble fragmentation dynamics |
| topic | Venturi-type bubble generator Bubble fragmentation Microbubble Computational Fluid Dynamics simulation |
| url | http://www.sciencedirect.com/science/article/pii/S1944398625001328 |
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