Effect of Multiple Structural Parameters on the Performance of a Micromixer with Baffles, Obstacles, and Gaps
As an essential component of chip laboratories and microfluidic systems, micromixers are widely used in fields such as chemical and biological analysis. In this work, a square cavity micromixer with multiple structural parameters (baffles, obstacles, and gaps) has been proposed to further improve th...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-09-01
|
| Series: | Micromachines |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2072-666X/14/9/1750 |
| _version_ | 1797578835942703104 |
|---|---|
| author | Jiacheng Nai Feng Zhang Peng Dong Fan Bai Ting Fu Jiangbo Wang Anle Ge |
| author_facet | Jiacheng Nai Feng Zhang Peng Dong Fan Bai Ting Fu Jiangbo Wang Anle Ge |
| author_sort | Jiacheng Nai |
| collection | DOAJ |
| description | As an essential component of chip laboratories and microfluidic systems, micromixers are widely used in fields such as chemical and biological analysis. In this work, a square cavity micromixer with multiple structural parameters (baffles, obstacles, and gaps) has been proposed to further improve the mixing performance of micromixers. This study examines the comprehensive effects of various structural parameters on mixing performance. The impact of baffle length, obstacle length-to-width ratio, gap width, and obstacle shape on the mixing index and pressure drop were numerically studied at different Reynolds numbers (<i>Re</i>). The results show that the mixing index increases with baffle length and obstacle length-to-width ratio and decreases with gap width at <i>Re</i> = 0.1, 1, 10, 20, 40, and 60. The mixing index can reach more than 0.98 in the range of <i>Re</i> ≥ 20 when the baffle length is 150 μm, the obstacle length-to-width ratio is 600/100, and the gap width is 200 μm. The pressure drop of the microchannel is proportional to baffle length and obstacle length-to-width ratio. Combining baffles and obstacles can further improve the mixing performance of square cavity micromixers. A longer baffle length, larger obstacle length-to-width ratio, narrower gap width, and a more symmetrical structure are conducive to improving the mixing index. However, the impact of pressure drop must also be considered comprehensively. The research results provide references and new ideas for passive micromixer structural design. |
| first_indexed | 2024-03-10T22:27:24Z |
| format | Article |
| id | doaj.art-c0ba5f102c574955b891b201701f9050 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-10T22:27:24Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-c0ba5f102c574955b891b201701f90502023-11-19T12:00:08ZengMDPI AGMicromachines2072-666X2023-09-01149175010.3390/mi14091750Effect of Multiple Structural Parameters on the Performance of a Micromixer with Baffles, Obstacles, and GapsJiacheng Nai0Feng Zhang1Peng Dong2Fan Bai3Ting Fu4Jiangbo Wang5Anle Ge6Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering, Wuhan University of Science and Technology, Wuhan 430081, ChinaHubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering, Wuhan University of Science and Technology, Wuhan 430081, ChinaKey Laboratory of Metallurgical Equipment and Control Technology, Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, ChinaSchool of Science, Wuhan University of Science and Technology, Wuhan 430081, ChinaPrecision Manufacturing Institute, Wuhan University of Science and Technology, Wuhan 430081, ChinaPrecision Manufacturing Institute, Wuhan University of Science and Technology, Wuhan 430081, ChinaSingle-Cell Center, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, ChinaAs an essential component of chip laboratories and microfluidic systems, micromixers are widely used in fields such as chemical and biological analysis. In this work, a square cavity micromixer with multiple structural parameters (baffles, obstacles, and gaps) has been proposed to further improve the mixing performance of micromixers. This study examines the comprehensive effects of various structural parameters on mixing performance. The impact of baffle length, obstacle length-to-width ratio, gap width, and obstacle shape on the mixing index and pressure drop were numerically studied at different Reynolds numbers (<i>Re</i>). The results show that the mixing index increases with baffle length and obstacle length-to-width ratio and decreases with gap width at <i>Re</i> = 0.1, 1, 10, 20, 40, and 60. The mixing index can reach more than 0.98 in the range of <i>Re</i> ≥ 20 when the baffle length is 150 μm, the obstacle length-to-width ratio is 600/100, and the gap width is 200 μm. The pressure drop of the microchannel is proportional to baffle length and obstacle length-to-width ratio. Combining baffles and obstacles can further improve the mixing performance of square cavity micromixers. A longer baffle length, larger obstacle length-to-width ratio, narrower gap width, and a more symmetrical structure are conducive to improving the mixing index. However, the impact of pressure drop must also be considered comprehensively. The research results provide references and new ideas for passive micromixer structural design.https://www.mdpi.com/2072-666X/14/9/1750micromixerbaffleobstaclemixing indexnumerical simulation |
| spellingShingle | Jiacheng Nai Feng Zhang Peng Dong Fan Bai Ting Fu Jiangbo Wang Anle Ge Effect of Multiple Structural Parameters on the Performance of a Micromixer with Baffles, Obstacles, and Gaps Micromachines micromixer baffle obstacle mixing index numerical simulation |
| title | Effect of Multiple Structural Parameters on the Performance of a Micromixer with Baffles, Obstacles, and Gaps |
| title_full | Effect of Multiple Structural Parameters on the Performance of a Micromixer with Baffles, Obstacles, and Gaps |
| title_fullStr | Effect of Multiple Structural Parameters on the Performance of a Micromixer with Baffles, Obstacles, and Gaps |
| title_full_unstemmed | Effect of Multiple Structural Parameters on the Performance of a Micromixer with Baffles, Obstacles, and Gaps |
| title_short | Effect of Multiple Structural Parameters on the Performance of a Micromixer with Baffles, Obstacles, and Gaps |
| title_sort | effect of multiple structural parameters on the performance of a micromixer with baffles obstacles and gaps |
| topic | micromixer baffle obstacle mixing index numerical simulation |
| url | https://www.mdpi.com/2072-666X/14/9/1750 |
| work_keys_str_mv | AT jiachengnai effectofmultiplestructuralparametersontheperformanceofamicromixerwithbafflesobstaclesandgaps AT fengzhang effectofmultiplestructuralparametersontheperformanceofamicromixerwithbafflesobstaclesandgaps AT pengdong effectofmultiplestructuralparametersontheperformanceofamicromixerwithbafflesobstaclesandgaps AT fanbai effectofmultiplestructuralparametersontheperformanceofamicromixerwithbafflesobstaclesandgaps AT tingfu effectofmultiplestructuralparametersontheperformanceofamicromixerwithbafflesobstaclesandgaps AT jiangbowang effectofmultiplestructuralparametersontheperformanceofamicromixerwithbafflesobstaclesandgaps AT anlege effectofmultiplestructuralparametersontheperformanceofamicromixerwithbafflesobstaclesandgaps |