Dynamic Sealing Using Magnetorheological Fluids
Micropumps are microfluidic components that are widely used in applications such as chemical analysis, biological sensing, and microrobots. However, one obstacle in developing micropumps is the extremely low efficiency relative to their macroscale counterparts. This paper presents a dynamic sealing...
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| Format: | Article |
| Language: | English |
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American Physical Society
2019
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| Online Access: | http://hdl.handle.net/1721.1/119842 https://orcid.org/0000-0002-7275-8393 https://orcid.org/0000-0001-7245-6435 https://orcid.org/0000-0003-4940-7496 |
| _version_ | 1826195079359889408 |
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| author | Liang, Youzhi Alvarado, Jose Ramon Iagnemma, Karl Hosoi, Anette E |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Liang, Youzhi Alvarado, Jose Ramon Iagnemma, Karl Hosoi, Anette E |
| author_sort | Liang, Youzhi |
| collection | MIT |
| description | Micropumps are microfluidic components that are widely used in applications such as chemical analysis, biological sensing, and microrobots. However, one obstacle in developing micropumps is the extremely low efficiency relative to their macroscale counterparts. This paper presents a dynamic sealing method for external gear pumps to reduce the volumetric losses through the clearance between the tips of gears and the housing by use of magnetorheological fluids. By mitigating these losses, we are able to achieve high efficiency and high volumetric accuracy with current mechanical architectures and manufacturing tolerances. Static and dynamic sealing using magnetorheological fluids are investigated theoretically and experimentally. The Mason numbers Mn(p) and Mn(Ω), which are defined in terms of the pressure gradient of the flow and the velocity of the moving boundary, respectively, are used to characterize and evaluate the sealing performance. A range of magnetic field intensities is explored to determine optimal sealing effectiveness, where effectiveness is evaluated with the ratio of volumetric loss and the friction factor. Finally, we quantify the effectiveness of this dynamic sealing method under different working conditions for gear pumps. |
| first_indexed | 2024-09-23T10:06:41Z |
| format | Article |
| id | mit-1721.1/119842 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T10:06:41Z |
| publishDate | 2019 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1198422022-09-26T15:48:05Z Dynamic Sealing Using Magnetorheological Fluids Liang, Youzhi Alvarado, Jose Ramon Iagnemma, Karl Hosoi, Anette E Massachusetts Institute of Technology. Department of Mechanical Engineering Liang, Youzhi Alvarado, Jose Ramon Iagnemma, Karl Hosoi, Anette E Micropumps are microfluidic components that are widely used in applications such as chemical analysis, biological sensing, and microrobots. However, one obstacle in developing micropumps is the extremely low efficiency relative to their macroscale counterparts. This paper presents a dynamic sealing method for external gear pumps to reduce the volumetric losses through the clearance between the tips of gears and the housing by use of magnetorheological fluids. By mitigating these losses, we are able to achieve high efficiency and high volumetric accuracy with current mechanical architectures and manufacturing tolerances. Static and dynamic sealing using magnetorheological fluids are investigated theoretically and experimentally. The Mason numbers Mn(p) and Mn(Ω), which are defined in terms of the pressure gradient of the flow and the velocity of the moving boundary, respectively, are used to characterize and evaluate the sealing performance. A range of magnetic field intensities is explored to determine optimal sealing effectiveness, where effectiveness is evaluated with the ratio of volumetric loss and the friction factor. Finally, we quantify the effectiveness of this dynamic sealing method under different working conditions for gear pumps. United States. Defense Advanced Research Projects Agency (Grant W31P4Q-13-1-0013) 2019-01-02T20:37:42Z 2019-01-02T20:37:42Z 2018-12 2018-09 2018-12-20T18:00:28Z Article http://purl.org/eprint/type/JournalArticle 2331-7019 http://hdl.handle.net/1721.1/119842 Liang, Youzhi et al. "Dynamic Sealing Using Magnetorheological Fluids." Physical Review Applied 10, 6 (December 2018): 064049 © 2018 American Physical Society https://orcid.org/0000-0002-7275-8393 https://orcid.org/0000-0001-7245-6435 https://orcid.org/0000-0003-4940-7496 en http://dx.doi.org/10.1103/PhysRevApplied.10.064049 Physical Review Applied Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Liang, Youzhi Alvarado, Jose Ramon Iagnemma, Karl Hosoi, Anette E Dynamic Sealing Using Magnetorheological Fluids |
| title | Dynamic Sealing Using Magnetorheological Fluids |
| title_full | Dynamic Sealing Using Magnetorheological Fluids |
| title_fullStr | Dynamic Sealing Using Magnetorheological Fluids |
| title_full_unstemmed | Dynamic Sealing Using Magnetorheological Fluids |
| title_short | Dynamic Sealing Using Magnetorheological Fluids |
| title_sort | dynamic sealing using magnetorheological fluids |
| url | http://hdl.handle.net/1721.1/119842 https://orcid.org/0000-0002-7275-8393 https://orcid.org/0000-0001-7245-6435 https://orcid.org/0000-0003-4940-7496 |
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