Dynamics of electrified jets in electrohydrodynamic atomization
An electrified jet ejected from a meniscus (or Taylor cone) can further disintegrate into fine drops with different modes in electrohydrodynamic atomization (EHDA). This process has been applied into many fields because of controllable production of highly charged and monodispersed drops. However, b...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-01-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X21008881 |
| _version_ | 1819002009266683904 |
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| author | Qian Kong Shiqi Yang Qisi Wang Zhentao Wang Qingming Dong Junfeng Wang |
| author_facet | Qian Kong Shiqi Yang Qisi Wang Zhentao Wang Qingming Dong Junfeng Wang |
| author_sort | Qian Kong |
| collection | DOAJ |
| description | An electrified jet ejected from a meniscus (or Taylor cone) can further disintegrate into fine drops with different modes in electrohydrodynamic atomization (EHDA). This process has been applied into many fields because of controllable production of highly charged and monodispersed drops. However, both stable and unstable electrified jets are encountered in EHDA, usually depending on liquid physical properties and operating parameters. A series of electrified jets are visualized and the transient breakup dynamics are analyzed within an electric field. According to the geometry forms of drops or/and jets emitted from the end of a needle, periodic dripping, pulsating-jet, stable-jet, and unstable jet are clearly classified. The operating parameters versus spraying modes are also discussed, especially for propylene glycol and n-octanol. The initial velocity from the Taylor cone, jet breakup length, jet position, and the size separation effect are deeply studied. The jet velocity is significantly accelerated by electric stresses and good agreement with predicted value. The jet breakup length increases sharply as liquid flow rate increasing and slowly increases as electric potential increasing, except for small liquid flow rate where bullet cone occurs. The jet ejection point varies and gradually deflects off needle axis with an increase in electric potential. The ‘size separation effect’ can help improve the quality of printing by removed highly charged satellite drops. |
| first_indexed | 2024-12-20T22:58:17Z |
| format | Article |
| id | doaj.art-f0c169cf7289472aba15de16ff53990a |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-12-20T22:58:17Z |
| publishDate | 2022-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-f0c169cf7289472aba15de16ff53990a2022-12-21T19:24:04ZengElsevierCase Studies in Thermal Engineering2214-157X2022-01-0129101725Dynamics of electrified jets in electrohydrodynamic atomizationQian Kong0Shiqi Yang1Qisi Wang2Zhentao Wang3Qingming Dong4Junfeng Wang5School of Energy and Power Engineering, Jiangsu University, PO Box 28, Zhenjiang, Jiangsu, 212013, ChinaSchool of Energy and Power Engineering, Jiangsu University, PO Box 28, Zhenjiang, Jiangsu, 212013, ChinaSchool of Energy and Power Engineering, Jiangsu University, PO Box 28, Zhenjiang, Jiangsu, 212013, ChinaCorresponding author. School of Energy and Power Engineering, Jiangsu University, PO Box 28, Zhenjiang, Jiangsu, 212013, China.; School of Energy and Power Engineering, Jiangsu University, PO Box 28, Zhenjiang, Jiangsu, 212013, ChinaSchool of Energy and Power Engineering, Jiangsu University, PO Box 28, Zhenjiang, Jiangsu, 212013, ChinaSchool of Energy and Power Engineering, Jiangsu University, PO Box 28, Zhenjiang, Jiangsu, 212013, ChinaAn electrified jet ejected from a meniscus (or Taylor cone) can further disintegrate into fine drops with different modes in electrohydrodynamic atomization (EHDA). This process has been applied into many fields because of controllable production of highly charged and monodispersed drops. However, both stable and unstable electrified jets are encountered in EHDA, usually depending on liquid physical properties and operating parameters. A series of electrified jets are visualized and the transient breakup dynamics are analyzed within an electric field. According to the geometry forms of drops or/and jets emitted from the end of a needle, periodic dripping, pulsating-jet, stable-jet, and unstable jet are clearly classified. The operating parameters versus spraying modes are also discussed, especially for propylene glycol and n-octanol. The initial velocity from the Taylor cone, jet breakup length, jet position, and the size separation effect are deeply studied. The jet velocity is significantly accelerated by electric stresses and good agreement with predicted value. The jet breakup length increases sharply as liquid flow rate increasing and slowly increases as electric potential increasing, except for small liquid flow rate where bullet cone occurs. The jet ejection point varies and gradually deflects off needle axis with an increase in electric potential. The ‘size separation effect’ can help improve the quality of printing by removed highly charged satellite drops.http://www.sciencedirect.com/science/article/pii/S2214157X21008881Electrohydrodynamic atomizationElectrified jetDynamicsSize separation effect |
| spellingShingle | Qian Kong Shiqi Yang Qisi Wang Zhentao Wang Qingming Dong Junfeng Wang Dynamics of electrified jets in electrohydrodynamic atomization Case Studies in Thermal Engineering Electrohydrodynamic atomization Electrified jet Dynamics Size separation effect |
| title | Dynamics of electrified jets in electrohydrodynamic atomization |
| title_full | Dynamics of electrified jets in electrohydrodynamic atomization |
| title_fullStr | Dynamics of electrified jets in electrohydrodynamic atomization |
| title_full_unstemmed | Dynamics of electrified jets in electrohydrodynamic atomization |
| title_short | Dynamics of electrified jets in electrohydrodynamic atomization |
| title_sort | dynamics of electrified jets in electrohydrodynamic atomization |
| topic | Electrohydrodynamic atomization Electrified jet Dynamics Size separation effect |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X21008881 |
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