Geoinformatics in Mapping of Fog-Affected Areas over Northern India and Development of Ion Based Fog Dispersion Technique

Saraf, A. K.; Choudhury, Pallabee; Das, Josodhir; Singh, Gaurav; Borgohain, Susanta; Baral, S.S.; Sharma, Kanika

doi:10.1007/978-981-10-3966-9_58

Cited by 1 publication

(1 citation statement)

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“…In addition, Phan-Cong and Jordan analyzed the impact of charge on transparency experimentally and found that unipolar space charges slightly delayed fog dissipation but bipolar space charges accelerated fog dissipation [10]. Pushpawela et al [11] and Saraf et al [12] discovered that air ionizers could promote fog dissipation. However, none of these results considered the effect of electric field on fog dissipation, which is always concomitant with the corona discharge.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the effects of parallel electric field on fog dissipation

Zhang

Jiawei

et al. 2023

J. Phys. D: Appl. Phys.

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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.

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Section: Introductionmentioning

confidence: 99%