Investigation on the effect of parallel electric field on fog dissipation
| Autor: | Ming Zhang, Li Jiawei, Chuan Li, Fuyou He, Dingchen Li, Kexun Yu, Yuan Pan |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Journal of Physics D: Applied Physics. |
| ISSN: | 1361-6463 0022-3727 |
| DOI: | 10.1088/1361-6463/acd85c |
| Popis: | Fog dissipation by charge and electric field has been a research hotspot owing to its economy and high efficiency compared with traditional technologies. However, the mechanism of the effect of electric field on temporal variation of droplet concentration is inadequate. Therefore, a cylinder fog chamber with 0.15 m in radius and 1 m in height is established to study the influence of electric field on concentration change of partially charged fog (50% of fog droplets are charged). The distribution of electric field in fog chamber is simulated by an electrostatic model in COMSOL and the electric field in fog chamber is regarded as a parallel electric field. A percentage concentration α, the ratio of the real droplet concentration n and the initial droplet concentration n0, is introduced to describe the effect of fog dissipation. The results show that visibility can increase from 10 m to 150 m after applying electric field. The shortest time is 12 s, which is much smaller than the natural settling time (102 s). What’s more, α firstly increases then decreases and finally gets close to zero with electric field E regardless of the charged state (neutral or partially charged) at the beginning of applying electric field (t = 60 s). Besides, the α without charging is smaller than that with partially charging. Finally, α decreases with electric field E regardless of charged state at the end of applying electric field (t = 240 s). These results can be explained by the relative strength of electrostatic force effect induced by electric field on neutral and charged droplets and gravitational effect, which are quantified by the calculation analysis of various forces. The results can be used to guide and optimize the structure of experimental setup in outdoor fog dissipation in the future. |
| Databáze: | OpenAIRE |
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