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Division of Environmental Physics - User: student
Faculty of Mathematics, Physics and Informatics, Comenius University Bratislava


Effects of corona space charge polarity and liquid phase ion mobility on the shape and velocities of water jets in the spindle j

Pongrác B., Krčma F., Dostál L., Kim H.H., Homola T., Machala Z.
J. Aerosol. Sci. 101, 196-206 (2016)

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Abstract:

The paper presents the experimental study of the effect of ions of different mobilities (H+, Cl-, Li+ and OH-) in electrosprayed water solutions under atmospheric pressure conditions in air and in SF6 background gas. Generally, at the atmospheric air conditions, the main difference between water electrospray (ES) in positive and in negative polarities is the shape and elongation direction of the water jets propagating from the charged nozzle. These phenomena can be associated with the movement of ions in water (i.e. the mobility of ions) or with the influence of the corona discharge and its ionic space charge. A comparison of HCl and LiOH water solutions with inversed mobility ratios of cations and anions showed that the mobility of ions inside the liquid is not an important parameter determining this difference between two ES polarities. The combined measurements in atmospheric air and SF6 gas clearly showed that the only important factor determining the different shapes and propagations of the water jets for both polarities is the corona discharge and its ionic space charge.


Citations:

1.)Guo YT; Li SP; Wu ZW; Zhu KW; Han YN; Wang NF: Interaction between electrospray using ionic liquid and simultaneous corona discharge under positive and negative polarity, PHYS. PLAS. 26 (7) 073511 (2019), WoS
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2.)Borra, J.-P., Review on water electro-sprays and applications of charged drops with focus on the corona-assisted cone-jet mode for High Efficiency Air Filtration by wet electro-scrubbing of aerosols, Journal of Aerosol Science 125, pp. 208-236 (2018) SCI
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3.)Jaworek, A., Sobczyk, A.T., Krupa, A., Electrospray application to powder production and surface coating, Journal of Aerosol Science 125, pp. 57-92 (2018) SCI
(2018)
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4.)Ganan-Calvo, A.M.; Lopez-Herrera, J.M.; Herrada, M.A.; et al. Review on the physics of electrospray: From electrokinetics to the operating conditions of single and coaxial Taylor cone-jets, and AC electrospray, J. Aerosol Sci. 125, 32-56 (2018) SCI
(2018)
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