Numerical Study of the Influence of the Type of Gas on Drag Reduction by Microbubble Injection
In this work, a novel numerical method for studying the influence of gas types on drag reduction by microbubble injection is presented. Aimed at the microbubble drag reduction (MBDR) process for different types of gases, the mass transfer velocity of different types of gases in the gas–liquid phase...
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MDPI AG
2024-01-01
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| Online Access: | https://www.mdpi.com/2411-5134/9/1/7 |
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| author | Hai An Po Yang Hanyu Zhang Xinquan Liu |
| author_facet | Hai An Po Yang Hanyu Zhang Xinquan Liu |
| author_sort | Hai An |
| collection | DOAJ |
| description | In this work, a novel numerical method for studying the influence of gas types on drag reduction by microbubble injection is presented. Aimed at the microbubble drag reduction (MBDR) process for different types of gases, the mass transfer velocity of different types of gases in the gas–liquid phase is defined by writing a user-defined function (UDF), which reflected the influence of gas solubility on the drag reduction rate. An Eulerian multiphase flow model and the Realizable <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>k</mi><mo>−</mo><mi>ε</mi></mrow></semantics></math></inline-formula> turbulence model are used for numerical calculation. The population balance model is used to describe the coalescence and breakup phenomena of the microbubble groups. Henry’s theorem is used to calculate the equilibrium concentration of the microbubble mixed flow. The interphase mass transfer rate of the microbubble injection process for different types of gases is studied by using permeation theory. The local mass fraction of the mixed flow is solved by the component transport equation. It is found that the larger the solubility of the gas, the lower the efficiency of MBDR. When the volume flow rate of the same type of gas is the same but the injection speed is different, the larger the solubility of the gas is, the greater the difference in the drag reduction ratio. |
| first_indexed | 2024-03-07T22:28:04Z |
| format | Article |
| id | doaj.art-da7f536415604117a06df05e7b29e91d |
| institution | Directory Open Access Journal |
| issn | 2411-5134 |
| language | English |
| last_indexed | 2024-03-07T22:28:04Z |
| publishDate | 2024-01-01 |
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| series | Inventions |
| spelling | doaj.art-da7f536415604117a06df05e7b29e91d2024-02-23T15:21:38ZengMDPI AGInventions2411-51342024-01-0191710.3390/inventions9010007Numerical Study of the Influence of the Type of Gas on Drag Reduction by Microbubble InjectionHai An0Po Yang1Hanyu Zhang2Xinquan Liu3College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, ChinaCollege of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, ChinaCollege of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, ChinaCollege of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, ChinaIn this work, a novel numerical method for studying the influence of gas types on drag reduction by microbubble injection is presented. Aimed at the microbubble drag reduction (MBDR) process for different types of gases, the mass transfer velocity of different types of gases in the gas–liquid phase is defined by writing a user-defined function (UDF), which reflected the influence of gas solubility on the drag reduction rate. An Eulerian multiphase flow model and the Realizable <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>k</mi><mo>−</mo><mi>ε</mi></mrow></semantics></math></inline-formula> turbulence model are used for numerical calculation. The population balance model is used to describe the coalescence and breakup phenomena of the microbubble groups. Henry’s theorem is used to calculate the equilibrium concentration of the microbubble mixed flow. The interphase mass transfer rate of the microbubble injection process for different types of gases is studied by using permeation theory. The local mass fraction of the mixed flow is solved by the component transport equation. It is found that the larger the solubility of the gas, the lower the efficiency of MBDR. When the volume flow rate of the same type of gas is the same but the injection speed is different, the larger the solubility of the gas is, the greater the difference in the drag reduction ratio.https://www.mdpi.com/2411-5134/9/1/7numerical studytype of gasmicrobubble drag reductioninterphase mass transfer ratedrag reduction ratio |
| spellingShingle | Hai An Po Yang Hanyu Zhang Xinquan Liu Numerical Study of the Influence of the Type of Gas on Drag Reduction by Microbubble Injection Inventions numerical study type of gas microbubble drag reduction interphase mass transfer rate drag reduction ratio |
| title | Numerical Study of the Influence of the Type of Gas on Drag Reduction by Microbubble Injection |
| title_full | Numerical Study of the Influence of the Type of Gas on Drag Reduction by Microbubble Injection |
| title_fullStr | Numerical Study of the Influence of the Type of Gas on Drag Reduction by Microbubble Injection |
| title_full_unstemmed | Numerical Study of the Influence of the Type of Gas on Drag Reduction by Microbubble Injection |
| title_short | Numerical Study of the Influence of the Type of Gas on Drag Reduction by Microbubble Injection |
| title_sort | numerical study of the influence of the type of gas on drag reduction by microbubble injection |
| topic | numerical study type of gas microbubble drag reduction interphase mass transfer rate drag reduction ratio |
| url | https://www.mdpi.com/2411-5134/9/1/7 |
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