Theoretical analysis on electrohydrodynamic instability of a low viscous electrified jet

Wang, Zhentao; Dai, Qian; Kong, Qian; Li, Bin; Tian, Jiameng; Yu, Kai; Huo, Yuanping; Wang, Junfeng

doi:10.1016/j.actaastro.2023.08.033

Cited by 2 publications

(2 citation statements)

References 56 publications

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“…Due to its fast and efficient operation, relatively low cost, and the ability to accurately control the droplet size, the EHDA technique is suitable for mass production of functional adsorbent particles. 26 In our recent publication, 27 the polyamidoxime (PAO)/SA composite microparticles (PAO/SA CMPs) were efficiently prepared using the EHDA technique. The PAO/SA CMPs showed superior uranium extraction performance, preeminent uranium selectivity, and antimicrobial properties, which can be readily recovered via sedimentation.…”

Section: Introductionmentioning

confidence: 99%

“…Owing to the unique physical process of EHDA, controllably generated uniform liquid droplets can be produced with diameters smaller than the nozzle in the microdripping mode. Due to its fast and efficient operation, relatively low cost, and the ability to accurately control the droplet size, the EHDA technique is suitable for mass production of functional adsorbent particles …”

Section: Introductionmentioning

confidence: 99%

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Porous Microparticle Preparation via Tuning Electrostatic Breakup Characteristics of a Non-Newtonian Fluid for High-Performance Uranium Extraction

Chen,

Wei,

et al. 2024

Ind. Eng. Chem. Res.

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Although polyamidoxime (PAO)-based materials have been acknowledged as one of the most promising adsorbents for commercial-scale uranium extraction, preparing materials with controllable size, high-performance uranium extraction, and effortless recovery is still challenging. The current study explores the potential of combining the electrohydrodynamic atomization (EHDA) technique with high-performance uranium extraction, where composite microparticles (CMPs) were facilely prepared via the EHDA technique, with the particle size being precisely controlled. The precursor is made of an environmentally friendly aqueous solution of PAO and sodium alginate (SA) at a certain ratio. Droplet breakup mechanism of the PAO/SA precursor under a nonuniform electric field was studied, which would result in PAO/SA CMPs with better controlled size. The produced CMPs were characterized to be a hollow structure, ranging from 100 to 2000 μm in size (long diameter), with interpenetrating nanopores being observed inside the particle shell. The equilibrium adsorption capacity increases gradually from ∼400 to ∼800 mg/g with decreasing particle size from 2200 to 120 μm. Hence, the uranium adsorption performance can be easily tuned to adapt to different application scenarios by altering the CMP size, which can be readily achieved via the EHDA technique. This work offers a novel route for generating high-performance uranium adsorbents with desired size and structure, in a highly efficient, facile, and lowcost way, showing great potential for industrial applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Porous Microparticle Preparation via Tuning Electrostatic Breakup Characteristics of a Non-Newtonian Fluid for High-Performance Uranium Extraction

Chen,

Wei,

et al. 2024

Ind. Eng. Chem. Res.

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Evidence of stretching/moving sheet-triggered nonlinear similarity flows: atomization and electrospinning with/without air resistance

Turkyilmazoglu

2024

HFF

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Purpose The purpose of this study is two-fold. First, it aims to differentiate the response of a stretching jet encountering a quadratic air resistance from the classical jet shape formed in a frictionless medium. Second, it investigates how the resulting jet forms with and without air resistance, seeking evidence that supports the similarity flows frequently studied for stretching/moving thin bodies under the boundary layer approximation. Design/methodology/approach This study extends the established electrohydrodynamic stretching jet theory, used to model electrospinning or jet printing in the absence of air resistance, to encompass the impact of the retarding force on the jet stretching in both the cone and final regimes before it impinges on a substrate. Findings A close examination of the nonlinear governing equations reveals that the jet rapidly thins near the nozzle because of the combined action of viscous and electrical forces. In this region, the exponentially decaying jet receives further support from the air resistance, resulting in a closer alignment with the observed experimental jet. This exponential decay, accelerated by the inversely quadratic speed of the liquid particles, serves as clear evidence for the existence of a similarity flow over an exponentially stretching sheet. Furthermore, in the final regime, the jet stretching exhibits an algebraic decay in the absence of air friction, while with air resistance, it decays exponentially to reach a limiting speed. In the former case, a square root dependence of the stretching jet speed leads to the emergence of a similarity flow over a thin stretching jet, while in the latter case, a Sakiadis’ similarity flow appears over a continuously moving flat surface. Practical implications The analysis goes beyond jet hydrodynamics, delving into the interplay of electrostatic forces (including Coulomb’s law) and quadratic air drag, drawing upon experimental data on glycerol liquid presented in earlier publications. Originality/value Finally, the asymptotic behavior of the stretching jet under the combined influence of electrostatic pull and its electric currents because of bulk conduction and surface convection is validated through a comprehensive numerical simulation of the nonlinear system.

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Theoretical analysis on electrohydrodynamic instability of a low viscous electrified jet

Cited by 2 publications

References 56 publications

Porous Microparticle Preparation via Tuning Electrostatic Breakup Characteristics of a Non-Newtonian Fluid for High-Performance Uranium Extraction

Porous Microparticle Preparation via Tuning Electrostatic Breakup Characteristics of a Non-Newtonian Fluid for High-Performance Uranium Extraction

Evidence of stretching/moving sheet-triggered nonlinear similarity flows: atomization and electrospinning with/without air resistance

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