Experimental and CFD Study of Internal Flow inside a Sessile Microdroplet undergoing Lateral Vibration
In this study, the internal flow pattern of a sessile microdroplet undergoing a lateral vibration was analyzed by using both the experimental and CFD simulation methods. By initially staining the droplet partially with fluorescent dye, the main flow inside the laterally vibrating microdrop was exper...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Isfahan University of Technology
2018-01-01
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| Series: | Journal of Applied Fluid Mechanics |
| Subjects: | |
| Online Access: | http://jafmonline.net/JournalArchive/download?file_ID=46616&issue_ID=250 |
| _version_ | 1818388036304502784 |
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| author | T. Zhu Z. Zhao L. Lv W. Chen L. Dong |
| author_facet | T. Zhu Z. Zhao L. Lv W. Chen L. Dong |
| author_sort | T. Zhu |
| collection | DOAJ |
| description | In this study, the internal flow pattern of a sessile microdroplet undergoing a lateral vibration was analyzed by using both the experimental and CFD simulation methods. By initially staining the droplet partially with fluorescent dye, the main flow inside the laterally vibrating microdrop was experimentally demonstrated to be that the main fluid flows downward along the central axis and ascends upward along the surface to form two counterflow circuits. Experimental evaluation of fluid mixing inside the droplets verified that the internal flowing velocity is dependent on the vibrating frequency, the main fluid flows faster at the resonant modes. CFD simulation using the VOF-CSF model showed that extra flow circuits exit inside the oscillating droplet besides the main flow. The diffusion of substrate momentum within the Stokes layer results in the two flow circuits near the bottom substrate, and the Laplace force due to the droplet deformation induces the two counter-current flow circuits near the surfaces of the microdroplet. |
| first_indexed | 2024-12-14T04:19:27Z |
| format | Article |
| id | doaj.art-fb9210c93d3a40a29829da3f64a9e0cf |
| institution | Directory Open Access Journal |
| issn | 1735-3572 |
| language | English |
| last_indexed | 2024-12-14T04:19:27Z |
| publishDate | 2018-01-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Journal of Applied Fluid Mechanics |
| spelling | doaj.art-fb9210c93d3a40a29829da3f64a9e0cf2022-12-21T23:17:25ZengIsfahan University of TechnologyJournal of Applied Fluid Mechanics1735-35722018-01-0111512471253.Experimental and CFD Study of Internal Flow inside a Sessile Microdroplet undergoing Lateral VibrationT. Zhu0Z. Zhao1L. Lv2W. Chen3L. Dong4School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 40004, PR ChinaQingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong, 266101, PR ChinaSchool of Chemistry and Chemical Engineering, Collaborative Innovation Center for Green Development in Wuling Moutain Area, Research Center for Environmental Monitoring,National-Municipal Joint Engineering Laboratory for Chemical Process Intensification and Reaction, Chongqing UniversityChongqing Univ, Key Lab Low Grade Energy Utilizat Technol & Syst, Minist Educ, Chongqing, PR ChinaIn this study, the internal flow pattern of a sessile microdroplet undergoing a lateral vibration was analyzed by using both the experimental and CFD simulation methods. By initially staining the droplet partially with fluorescent dye, the main flow inside the laterally vibrating microdrop was experimentally demonstrated to be that the main fluid flows downward along the central axis and ascends upward along the surface to form two counterflow circuits. Experimental evaluation of fluid mixing inside the droplets verified that the internal flowing velocity is dependent on the vibrating frequency, the main fluid flows faster at the resonant modes. CFD simulation using the VOF-CSF model showed that extra flow circuits exit inside the oscillating droplet besides the main flow. The diffusion of substrate momentum within the Stokes layer results in the two flow circuits near the bottom substrate, and the Laplace force due to the droplet deformation induces the two counter-current flow circuits near the surfaces of the microdroplet.http://jafmonline.net/JournalArchive/download?file_ID=46616&issue_ID=250 Internal flow; Sessile drop; Lateral vibration; Microdrops. |
| spellingShingle | T. Zhu Z. Zhao L. Lv W. Chen L. Dong Experimental and CFD Study of Internal Flow inside a Sessile Microdroplet undergoing Lateral Vibration Journal of Applied Fluid Mechanics Internal flow; Sessile drop; Lateral vibration; Microdrops. |
| title | Experimental and CFD Study of Internal Flow inside a Sessile Microdroplet undergoing Lateral Vibration |
| title_full | Experimental and CFD Study of Internal Flow inside a Sessile Microdroplet undergoing Lateral Vibration |
| title_fullStr | Experimental and CFD Study of Internal Flow inside a Sessile Microdroplet undergoing Lateral Vibration |
| title_full_unstemmed | Experimental and CFD Study of Internal Flow inside a Sessile Microdroplet undergoing Lateral Vibration |
| title_short | Experimental and CFD Study of Internal Flow inside a Sessile Microdroplet undergoing Lateral Vibration |
| title_sort | experimental and cfd study of internal flow inside a sessile microdroplet undergoing lateral vibration |
| topic | Internal flow; Sessile drop; Lateral vibration; Microdrops. |
| url | http://jafmonline.net/JournalArchive/download?file_ID=46616&issue_ID=250 |
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