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Effect of Sparger Characteristics on Bubble-Formation Dynamics under Oscillatory Air Pattern. Processes (Basel) 2022. [DOI: 10.3390/pr10050997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The size of bubbles generated from a porous sparger is at least an order of magnitude larger than the pore diameter under the steady air pattern. Recent studies have shown that the bubble size can be significantly reduced when the steady air flow is replaced by an oscillatory pattern. However, the effectiveness of oscillatory air flow on reducing bubble size under different sparger characteristics is yet to be studied. This work fundamentally investigates the response of bubble size to sparger characteristics under an oscillatory air pattern by segregating the bubble formation subprocesses into bubble detachment and consequent coalescence. The results show that bubble size significantly decreased with hydrophilic plates regardless of contact angle, owing to depressed coalescence, while no impact was observed for a hydrophobic plate. The influence of the oscillatory air pattern on decreasing bubble size was weakened as the chamber volume was increased, and above a critical volume the bubble-formation process became similar with that under a steady air pattern. An optimum plate thickness was obtained for bubble generation by avoiding weeping, and meanwhile taking full advantage of the momentum force by the oscillatory airflow. The outcomes show that the oscillatory air pattern in determining bubble formation closely depends on the sparger characteristics, which should be appropriately determined.
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Song A, Zhao S, Li C, Cao Y. A Quantitative Study on the Decreased Diameter of Bubbles Generated from a Submerged Orifice with an Oscillatory Air Supply. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.1c03994] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ajuan Song
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Sijia Zhao
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Chao Li
- Henan Province Industrial Technology Research Institute of Resources and Materials, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Yijun Cao
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China
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Sahasrabudhe SN, Staton JA, Farkas BE. Parametric study on liquid and surface properties affecting meniscus dynamics during bubble formation in capillaries- Applications to frying. J FOOD ENG 2020. [DOI: 10.1016/j.jfoodeng.2020.110082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Wen J, Tian R, Tan S, Sun Q, Gu H. The weeping characteristic of submerged multi-orifice plate. Chin J Chem Eng 2020. [DOI: 10.1016/j.cjche.2019.12.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Hossain MI, Pang QX, Pang SQ, Yang Y, Lau R. Effect of Orifice Surface Roughness on the Liquid Weeping in Bubble Columns. Ind Eng Chem Res 2010. [DOI: 10.1021/ie101182x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Md. Iqbal Hossain
- Nangyang Technological University, Singapore, School of Chemical and Biomedical Engineering, 62 Nanyang Drive, Singapore 637459
| | - Qing Xi Pang
- Nangyang Technological University, Singapore, School of Chemical and Biomedical Engineering, 62 Nanyang Drive, Singapore 637459
| | - Si Qi Pang
- Nangyang Technological University, Singapore, School of Chemical and Biomedical Engineering, 62 Nanyang Drive, Singapore 637459
| | - Yanhui Yang
- Nangyang Technological University, Singapore, School of Chemical and Biomedical Engineering, 62 Nanyang Drive, Singapore 637459
| | - Raymond Lau
- Nangyang Technological University, Singapore, School of Chemical and Biomedical Engineering, 62 Nanyang Drive, Singapore 637459
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Hossain MI, Pang SQ, Pang QX, Yang Y, Lau R. Study of Liquid Weeping at a Tapered Orifice in a Bubble Column Reactor by a Computer-Aided Image Analysis Algorithm. Ind Eng Chem Res 2010. [DOI: 10.1021/ie901516f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Md. Iqbal Hossain
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459
| | - Si Qi Pang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459
| | - Qing Xi Pang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459
| | - Yanhui Yang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459
| | - Raymond Lau
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459
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Das A, Das P. Bubble evolution through submerged orifice using smoothed particle hydrodynamics: Basic formulation and model validation. Chem Eng Sci 2009. [DOI: 10.1016/j.ces.2009.01.053] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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