Numerical analysis of deformation and breakup of a compound droplet in microchannels
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| Định dạng: | Bài Báo |
| Ngôn ngữ: | English |
| Nhà xuất bản: |
European Journal of Mechanics - B/Fluids
2021
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| Chủ đề: | |
| Truy cập trực tuyến: | https://www.sciencedirect.com/science/article/abs/pii/S0997754621000455?via%3Dihub#! https://dlib.phenikaa-uni.edu.vn/handle/PNK/1840 https://doi.org/10.1016/j.euromechflu.2021.03.005 |
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oai:localhost:PNK-18402022-08-17T05:54:44Z Numerical analysis of deformation and breakup of a compound droplet in microchannels Nguyen, Cuong T. Vu, Hung V. Vu, Truong V. Truong, Thuan V. Ho, Nang X. Pham, Binh D. Nguyen, Vinh T. Nguyen, Hoe D. Compound droplet Microchannel Simulation Front-tracking Q2 Compound droplets with different sizes are increasingly used in industrial production and academic research. This study aims to improve understanding of the dynamical behaviors of the compound droplet moving in microchannels. The compound droplet consisting of one inner core is initially concentric and placed at the entrance of a circular channel with a cone at the downstream region. Following this primary channel is a secondary channel that is circular and straight. Manipulation of the droplet is assisted by a flow introduced via the gap between two channels. The numerical results show that when passing through these confined channels, the droplet experiences a finite deformation or breakup mode. In each mode, the deformation or breakup of the compound droplet is also different when changing the values of the parameters including the capillary number, the ratio of the droplet radii, the ratio of the interfacial tension, the size of the secondary channel, the gap size and the cone angle. The finitely deformed droplet can be either nearly ellipsoidal with a deformation index D of around unity (i.e., first deformation mode) or highly elongated with a high D (i.e., second deformation mode). Breakup of the compound droplet happens to the outer droplet, and the breakup point is located either in front of the inner droplet (i.e., first breakup mode) or behind it (i.e., second breakup mode). The simple droplets yielded in the first breakup mode has a higher total volume than those in the second breakup mode. It is found that the droplet experiences the first deformation mode to the first breakup mode, then the second deformation mode and finally the second breakup mode when Ca increases. The regime diagrams of these modes, based on these parameters, are also presented. 2021-06-17T08:28:36Z 2021-06-17T08:28:36Z 2021 Article Working Paper https://www.sciencedirect.com/science/article/abs/pii/S0997754621000455?via%3Dihub#! https://dlib.phenikaa-uni.edu.vn/handle/PNK/1840 https://doi.org/10.1016/j.euromechflu.2021.03.005 en European Journal of Mechanics - B/Fluids |
| institution |
Digital Phenikaa |
| collection |
Digital Phenikaa |
| language |
English |
| topic |
Compound droplet Microchannel Simulation Front-tracking |
| spellingShingle |
Compound droplet Microchannel Simulation Front-tracking Nguyen, Cuong T. Numerical analysis of deformation and breakup of a compound droplet in microchannels |
| description |
Q2 |
| author2 |
Vu, Hung V. |
| author_facet |
Vu, Hung V. Nguyen, Cuong T. |
| format |
Article |
| author |
Nguyen, Cuong T. |
| author_sort |
Nguyen, Cuong T. |
| title |
Numerical analysis of deformation and breakup of a compound droplet in microchannels |
| title_short |
Numerical analysis of deformation and breakup of a compound droplet in microchannels |
| title_full |
Numerical analysis of deformation and breakup of a compound droplet in microchannels |
| title_fullStr |
Numerical analysis of deformation and breakup of a compound droplet in microchannels |
| title_full_unstemmed |
Numerical analysis of deformation and breakup of a compound droplet in microchannels |
| title_sort |
numerical analysis of deformation and breakup of a compound droplet in microchannels |
| publisher |
European Journal of Mechanics - B/Fluids |
| publishDate |
2021 |
| url |
https://www.sciencedirect.com/science/article/abs/pii/S0997754621000455?via%3Dihub#! https://dlib.phenikaa-uni.edu.vn/handle/PNK/1840 https://doi.org/10.1016/j.euromechflu.2021.03.005 |
| _version_ |
1751856296112422912 |
| score |
8.891787 |