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A review of VOF methods for simulating bubble dynamics. PROGRESS IN NUCLEAR ENERGY 2022. [DOI: 10.1016/j.pnucene.2022.104478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Fu J, Huang Y, Liao Q, Xia A, Fu Q, Zhu X. Photo-bioreactor design for microalgae: A review from the aspect of CO 2 transfer and conversion. BIORESOURCE TECHNOLOGY 2019; 292:121947. [PMID: 31466821 DOI: 10.1016/j.biortech.2019.121947] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 07/30/2019] [Accepted: 07/31/2019] [Indexed: 06/10/2023]
Abstract
Photobioreactor (PBR) is the most critical equipment for microalgal photosynthetic fixation of CO2. It provides suitable environmental conditions, such as CO2, light and nutrients, for microalgal growth. As the major carbon source for microalgae, CO2 gas is pumped into PBR with the formation of bubbles and formed gas-liquid flow. The gas-liquid flow affects CO2 and nutrients transmission as well as microalgae cells distribution in PBR, thereby affecting the biochemical reaction of microalgae. While the migration and transport of biochemical reaction products affect the two-phase flow, phase distribution and flow resistance in the PBR in return, thus affecting the transport of light and nutrients. Therefore, microalgal photosynthetic rate is determined synthetically by two-phase flow and the transport of CO2, light and nutrients in PBR. Deep understanding of gas-liquid two-phase flow, energy and mass transfer coupling with microalgal growth in PBR is the cornerstone for the design of an efficient microalgae PBR.
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Affiliation(s)
- Jingwei Fu
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China
| | - Yun Huang
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China
| | - Qiang Liao
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China.
| | - Ao Xia
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China
| | - Qian Fu
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China
| | - Xun Zhu
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China
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Li X, Wang W, Zhang P, Li J, Chen G. Interactions between gas-liquid mass transfer and bubble behaviours. ROYAL SOCIETY OPEN SCIENCE 2019; 6:190136. [PMID: 31218056 PMCID: PMC6549981 DOI: 10.1098/rsos.190136] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 04/05/2019] [Indexed: 06/09/2023]
Abstract
Interactions between gas-liquid mass transfer and bubble behaviours were investigated to improve the understanding of the relationship between the two sides. The CO2/N2-water system was applied to study the bubble behaviours based on the volume-of-fluid (VOF) model. The mass transfer conditions were taken into consideration when the fluid field was analysed. The bubble behaviours were compared with and without mass transfer. The results show that the absolute slopes of the curves for mass fraction inside the single rising bubbles, with diameters from 3 to 6 mm, decrease from 0.09325 to 0.02818. It means that small single bubbles have higher mass transfer efficiency. The daughter bubbles of cutting behaviour and initial side-by-side bubbles of coalescence behaviour also perform better than the initial large bubbles and coalesced bubbles, respectively. The bubble behaviours affect the mass transfer process. However, the latter also reacts upon the former. The critical intervals between the side-by-side bubbles decrease from 2.0 to 0.9 mm when the bubble diameter changes from 3 to 7 mm. For the coalescence behaviour without mass transfer, the critical intervals are larger because there is no influence of concentration around the bubbles on the bubble motion. The coalescence of cut daughter bubbles is also influenced by the concentration. It was suggested that the interaction between the gas-liquid mass transfer and bubble behaviours cannot be ignored.
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Affiliation(s)
- Xin Li
- College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, People's Republic of China
| | - Weiwen Wang
- College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, People's Republic of China
| | - Pan Zhang
- College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, People's Republic of China
| | - Jianlong Li
- College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, People's Republic of China
| | - Guanghui Chen
- College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, People's Republic of China
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Li R, Zhang J, Yong Y, Wang Y, Yang C. Numerical simulation of steady flow past a liquid sphere immersed in simple shear flow at low and moderate Re. Chin J Chem Eng 2015. [DOI: 10.1016/j.cjche.2014.10.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Islam MT, Ganesan P, Cheng J. A pair of bubbles’ rising dynamics in a xanthan gum solution: a CFD study. RSC Adv 2015. [DOI: 10.1039/c4ra15728a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The motion and interaction of a bubble pair in a non-Newtonian fluid are numerically simulated by a volume of fluid method. The effects of initial horizontal bubble interval, oblique alignment and fluid rheological properties on the pair of rising bubbles are evaluated.
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Affiliation(s)
- Md. Tariqul Islam
- Department of Mechanical Engineering
- University of Malaya
- 50603 Kuala Lumpur
- Malaysia
| | - P. Ganesan
- Department of Mechanical Engineering
- University of Malaya
- 50603 Kuala Lumpur
- Malaysia
| | - Ji Cheng
- Department of Mechanical Engineering
- University of Malaya
- 50603 Kuala Lumpur
- Malaysia
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