Flow direction-dependent elastic instability in a symmetry-breaking microchannel
This paper reports flow direction-dependent elastic instability in a symmetry-breaking microchannel. The microchannel consisted of a square chamber and a nozzle structure. A viscoelastic polyacrylamide solution was used for the instability demonstration. The instability was realized as the viscoelas...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/160792 |
| _version_ | 1811688789885583360 |
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| author | Zhang, Wu Wang, Zihuang Zhang, Meng Lin, Jiahan Chen, Weiqian Hu, Yuhong Li, Shuzhou |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Zhang, Wu Wang, Zihuang Zhang, Meng Lin, Jiahan Chen, Weiqian Hu, Yuhong Li, Shuzhou |
| author_sort | Zhang, Wu |
| collection | NTU |
| description | This paper reports flow direction-dependent elastic instability in a symmetry-breaking microchannel. The microchannel consisted of a square chamber and a nozzle structure. A viscoelastic polyacrylamide solution was used for the instability demonstration. The instability was realized as the viscoelastic flow became asymmetric and unsteady in the microchannel when the flow exceeded a critical Weissenberg number. The critical Weissenberg number was found to be different for the forward-directed flow and the backward-directed flow in the microchannel. |
| first_indexed | 2024-10-01T05:37:48Z |
| format | Journal Article |
| id | ntu-10356/160792 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:37:48Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1607922023-07-14T16:05:22Z Flow direction-dependent elastic instability in a symmetry-breaking microchannel Zhang, Wu Wang, Zihuang Zhang, Meng Lin, Jiahan Chen, Weiqian Hu, Yuhong Li, Shuzhou School of Materials Science and Engineering Engineering::Materials Viscoelastic Fluid Elastic Instability This paper reports flow direction-dependent elastic instability in a symmetry-breaking microchannel. The microchannel consisted of a square chamber and a nozzle structure. A viscoelastic polyacrylamide solution was used for the instability demonstration. The instability was realized as the viscoelastic flow became asymmetric and unsteady in the microchannel when the flow exceeded a critical Weissenberg number. The critical Weissenberg number was found to be different for the forward-directed flow and the backward-directed flow in the microchannel. Published version The research was funded by the National Natural Science Foundation of China (Grant No. 61905046), the China Postdoctoral Science Foundation (Grant No. 2020M683044), the Provincial Key Laboratory of Information Photonics Technology (Guangdong University of Technology, Grant No. GKPT20-08), the Science and Technology Projects in Guangzhou (Grant No. 202102010446), and the National College Student Innovation and Entrepreneurship Training Program of Guangzhou University (Grant No. 202111078049). 2022-08-03T01:14:47Z 2022-08-03T01:14:47Z 2021 Journal Article Zhang, W., Wang, Z., Zhang, M., Lin, J., Chen, W., Hu, Y. & Li, S. (2021). Flow direction-dependent elastic instability in a symmetry-breaking microchannel. Micromachines, 12(10), 1139-. https://dx.doi.org/10.3390/mi12101139 2072-666X https://hdl.handle.net/10356/160792 10.3390/mi12101139 34683190 2-s2.0-85116014792 10 12 1139 en Micromachines © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/). application/pdf |
| spellingShingle | Engineering::Materials Viscoelastic Fluid Elastic Instability Zhang, Wu Wang, Zihuang Zhang, Meng Lin, Jiahan Chen, Weiqian Hu, Yuhong Li, Shuzhou Flow direction-dependent elastic instability in a symmetry-breaking microchannel |
| title | Flow direction-dependent elastic instability in a symmetry-breaking microchannel |
| title_full | Flow direction-dependent elastic instability in a symmetry-breaking microchannel |
| title_fullStr | Flow direction-dependent elastic instability in a symmetry-breaking microchannel |
| title_full_unstemmed | Flow direction-dependent elastic instability in a symmetry-breaking microchannel |
| title_short | Flow direction-dependent elastic instability in a symmetry-breaking microchannel |
| title_sort | flow direction dependent elastic instability in a symmetry breaking microchannel |
| topic | Engineering::Materials Viscoelastic Fluid Elastic Instability |
| url | https://hdl.handle.net/10356/160792 |
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