Particle Motion Induced by Electrostatic Force of a Charged Droplet

Zuo, Ziwen; WangJunfeng,; HuoYuanping,; LiuHailong,; XuRongbin,

doi:10.1089/ees.2015.0470

Cited by 18 publications

(8 citation statements)

References 29 publications

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“…It is difficult to collect ultra-fine dust particles from a large space volume to make the air clean. The study was reported to absorb fine particles by an electriferous single drop33. The present work provides a new way to absorb fine dust particles by drop array to protect environment for large scale utilization.…”

Section: Conclusion and Perspectivementioning

confidence: 84%

Large scale generation of micro-droplet array by vapor condensation on mesh screen piece

Xie

et al. 2017

Sci Rep

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We developed a novel micro-droplet array system, which is based on the distinct three dimensional mesh screen structure and sintering and oxidation induced thermal-fluid performance. Mesh screen was sintered on a copper substrate by bonding the two components. Non-uniform residue stress is generated along weft wires, with larger stress on weft wire top location than elsewhere. Oxidation of the sintered package forms micro pits with few nanograsses on weft wire top location, due to the stress corrosion mechanism. Nanograsses grow elsewhere to show hydrophobic behavior. Thus, surface-energy-gradient weft wires are formed. Cooling the structure in a wet air environment nucleates water droplets on weft wire top location, which is more “hydrophilic” than elsewhere. Droplet size is well controlled by substrate temperature, air humidity and cooling time. Because warp wires do not contact copper substrate and there is a larger conductive thermal resistance between warp wire and weft wire, warp wires contribute less to condensation but function as supporting structure. The surface energy analysis of drops along weft wires explains why droplet array can be generated on the mesh screen piece. Because the commercial material is used, the droplet system is cost effective and can be used for large scale utilization.

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Section: Conclusion and Perspectivementioning

confidence: 84%

Large scale generation of micro-droplet array by vapor condensation on mesh screen piece

Xie

et al. 2017

Sci Rep

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“…However, an easy and compact technique to create aerosol directly in the observation chamber utilizing the same electrical setup of the experiment is exercised. Electric field is often used in powder technologies to momentarily liftoff particulate matter larger than airborne size, to achieve uniform spreading of powder on a conveyor 27 and to study the interaction of particles placed on a plate electrode with spherical liquid electrodes 28 . It has been concluded that particles lift off due to Coulombic force 27,29 in such settings.…”

Section: Amentioning

confidence: 99%

“…Zuo et.al. 28 estimated experimentally and numerically, specific charge equivalent to thousands of electrons is attained on each particle of above micron size.…”

Section: Amentioning

confidence: 99%

Demonstration of a droplet electrohydrodynamic blower in aerosols

Srinivasula¹,

Biswal²

2022

Preprint

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Despite a rigorous analysis of nonlinear electrohydrodynamics of a liquid droplet deformation in air, its influence on the surrounding gas phase has received less attention.We observed, air circulations created due to large deformation oscillations of a pendant water droplet subject to a resonating electric field act like a micro or mini blower in the air around the droplet. This is demonstrated through the deterioration of a strong electrostatic airborne particulate capture onto the droplet, when it is placed in an aerosol. Such strong local aerodynamic influence on the surrounding aerosol particulate, heat and mass transfer in the two phase system provoke further interest in fundamental and technological research.

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“…Kanaoka et al [37] simulated the agglomerative deposition process of fine aerosol particles (390 nm) under a dust-laden condition and concluded that the Coulomb force essentially determined the trajectory of charged particles. Zuo et al [38] studied the removal of particulate matter in polluted air, quantitatively analyzed the forces exerted on the moving particles (10 μm), and concluded that the image force could be neglected, compared with the Coulomb force. Therefore, we focused on the Coulomb force to study the effect of electrostatic force on the filtration efficiency for low-concentrated ultrafine particles.…”

Section: Electric Field Modelmentioning

confidence: 99%

CFD Simulation of the Filtration Performance of Fibrous Filter Considering Fiber Electric Potential Field

Hou

Zhou

Xiao

et al. 2019

Trans. Tianjin Univ.

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Aiming at disclosing the quantitative effects of Coulomb forces on the filtration efficiency of aerosol particles, a threedimensional random fiber model was established to describe the microstructure of fibrous filters. Then, computational models including the flow model, particle model, and electric field model were constructed to estimate the filtration efficiency using the Fluent custom user-defined function program, neglecting the non-uniformity of the fiber potential and the particle charge distribution. The simulation results using the established models agreed with the data in the literature. In particular, the electric field force was found to be one of the important factors required to improve the filtration efficiency estimation accuracy for the ultrafine particles. Moreover, the variation tendencies of the filtration efficiency and the pressure drop of fibrous filters were studied based on the influence factors of the fiber potential, particle charge-to-mass ratio, solid volume fraction, fiber diameter, and face velocity. The established models and estimated results will provide important guidance on the design of high-efficiency particulate air filters for aerosol particles.

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Particle Motion Induced by Electrostatic Force of a Charged Droplet

Cited by 18 publications

References 29 publications

Large scale generation of micro-droplet array by vapor condensation on mesh screen piece

Large scale generation of micro-droplet array by vapor condensation on mesh screen piece

Demonstration of a droplet electrohydrodynamic blower in aerosols

CFD Simulation of the Filtration Performance of Fibrous Filter Considering Fiber Electric Potential Field

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