Journal of Electrostatics最新文献

{"title":"Operando space charge distribution measurements coupled with cyclic voltammetry","authors":"Mathilde Arnaud ,&nbsp;Yann Walter ,&nbsp;Amina Cheutin ,&nbsp;Zehui Zhou ,&nbsp;Rémi Federicci ,&nbsp;Stéphane Holé ,&nbsp;Brigitte Leridon","doi":"10.1016/j.elstat.2025.104049","DOIUrl":"10.1016/j.elstat.2025.104049","url":null,"abstract":"<div><div>Understanding the electrode–electrolyte interface in energy storage devices remains an important challenge for the improvement of these systems. This paper introduces an operando technique that couples cyclic voltammetry with a system implementing the Pressure-Wave-Propagation method. This technique has been applied to RbOH ceramics containing either silver or gold electrodes, revealing different space charge distributions during their oxidation processes. In addition, this experimental method was employed to monitor aluminum corrosion in the presence of a NaCl solution. This method provides insights on the dynamics of electrostatic charges during charging–discharging cycles and enables to gather critical information from solid–liquid and solid–solid interfaces.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"135 ","pages":"Article 104049"},"PeriodicalIF":1.9,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Abrasive induced discharge in solar array drive assembly: Experiment and Monte Carlo simulation","authors":"Zhiang Ding ,&nbsp;Qi Chen ,&nbsp;Chengshan Liu ,&nbsp;Zhiyuan Qian","doi":"10.1016/j.elstat.2025.104048","DOIUrl":"10.1016/j.elstat.2025.104048","url":null,"abstract":"<div><div>Abrasive-induced arc discharge is considered a significant threat to the failure of Solar Array Drive Assembly (SADA). This study attempts to identify the causes of discharge faults in SADA and propose protective strategies. Experiments on the mechanism of abrasive-induced discharge using the equivalent structural components of the SADA electrical transmission and corresponding simulations using Particle-in-Cell Monte-Carlo-Collision (PIC-MCC) calculations are performed. The characteristic voltage-current curves, time evolution of arc and glow discharges of the failed structure were experimentally obtained. The results showed that the discharge characteristic curves with abrasives were higher and steeper than those without abrasives under the same voltages. Through simulations, the plasma distribution, electric field intensity, and potential distribution resulting from a break were obtained, revealing that the flow forms slightly away from the electrode tips, and the electric field distortion induced by abrasives has a significant impact on the discharge. Plasma discharge treatment was further conducted on the insulating material, and an increase in the flashover voltage of the treated insulating material was observed. The relationship between the discharge voltage of the structural component and the number of discharges was also investigated. The results indicated that there was not a significant correlation between the discharge voltage and the number of discharges. However, the presence of abrasives did have an impact on the discharge voltage. It is evident from the above that the failures induced by abrasion-triggered discharges inside the SADA cannot be overlooked. Treating the insulating material with plasma is recommended to increase its flashover voltage in surface flashover situations. This article represents original research, and its findings are of significant value in exploring the mechanism of abrasion-induced discharges leading to the failure of the internal conductive ring in SADA.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"135 ","pages":"Article 104048"},"PeriodicalIF":1.9,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of pre-charger length, symmetry and insertion depth on PM2.5 removal efficiency for electrostatic precipitator (ESP)-type wearable personal air cleaner","authors":"Muhammad Hanzla Munir ,&nbsp;Sohee An ,&nbsp;Gwangtaek Lee ,&nbsp;Hak-Joon Kim","doi":"10.1016/j.elstat.2025.104047","DOIUrl":"10.1016/j.elstat.2025.104047","url":null,"abstract":"<div><div>Electrical properties such as the electric field, charge transport, the coupling between them; and particles' trajectories and particles’ charging in the turbulent air flow field, are simulated for four pre-chargers of a two-stage electrostatic precipitator (ESP) fitted inside a prototype wearable personal air cleaner. Three of the pre-chargers are cylindrical with various lengths; the fourth pre-charger is the combination of a cylinder and a cuboid. The purposes of these simulations are to investigate the variations in the pre-chargers' electrical properties when the pre-chargers differ in length and symmetry, and to support the PM_2.5 removal efficiency values which are experimentally measured on all insertion depths of the optimal pre-charger and for all pre-chargers.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"135 ","pages":"Article 104047"},"PeriodicalIF":1.9,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143478589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geometric profile design effect on composite insulator performance in rainy climate using electrostatic field analysis","authors":"Amro Al-Chalabi,&nbsp;Aws Al-Taie","doi":"10.1016/j.elstat.2025.104051","DOIUrl":"10.1016/j.elstat.2025.104051","url":null,"abstract":"<div><div>Composite insulators have spread in the power grid replacing the old generation ceramic insulators. Their geometry can be modified to yield better electric field distribution. This reflects positively on the insulator water pollution performance preventing pollution flashover. In this work, the performance of twelve different designs of 33 kV composite insulator under rain pollution conditions is judged depending on analyzing the electric field distribution. The alternating fields, with frequencies above 1 Hz, are represented by electrostatic fields for most insulating materials. The approach utilizes the finite element method (FEM) based electrostatic field solver of COMSOL Multiphysics software. The performance of the different profile designs is compared systematically based on the reduction percentage of the field efficiency factor, and the selection went through three stages. Firstly, the performance of uniform profiles for the flat shed and inclined sheds were compared showing that the latter has a better electrostatic field distribution when polluted for both eight and ten shed profiles. Secondly, the performance of the uniform and alternating, with one and two small sheds, inclined profiles have been compared for both the eight and ten shed profiles. The results showed that the alternating profile with two small sheds has the better performance at rainy climate. Finally, for the performance of the alternating inclined two small sheds profile, the ten sheds profile design surpassed the other eight sheds design profile with 55.56 % of reduction percentage for the field efficiency factor in heavy rain (HR) and 33.33 % for light rain (LR) conditions.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"135 ","pages":"Article 104051"},"PeriodicalIF":1.9,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143463362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tribo-electrostatic separation of plastic flakes originating from packaging waste","authors":"Khaled Daioui ,&nbsp;Thami Zeghloul ,&nbsp;Nils Perbet ,&nbsp;Lucian Dascalescu","doi":"10.1016/j.elstat.2025.104046","DOIUrl":"10.1016/j.elstat.2025.104046","url":null,"abstract":"<div><div>Free-fall tribo-electrostatic separators are commonly used in the recycling industry for sorting granular waste plastics but are much less effective in the case of flake-like materials of irregular shapes. This work was aimed at demonstrating that by modifying the design of a commercial rotating-cylinder-type tribocharger it is possible to expand the usage of such a separator to processing flakes originating from the shredding of packaging waste. The study was conducted on a mixture of flakes consisting of roughly 60 % PEHD (Polyethylene) and 40 % PP (Polypropylene), with an average size ranging from 8 mm to 10 mm. The plastic flakes were first introduced into the modified tribocharger, then transferred to a vibratory-plate conveyor that fed them as a mono-layer curtain at the upper end of an industrial free-fall electrostatic separator, equipped with two vertical plate electrodes (width: 150 cm; length: 200 cm), energized from two high-potential generators of opposing polarities (+60 kV, −100 kV). Under the action of the electric field, the respectively negatively- and positively-charged PEHD et PP flakes were sorted into distinct compartments. The modified design of the commercial tribocharger enabled the increase of the number and the frequency of the flake/wall and flake/flake collisions that ensure the electric charging. To investigate the impact of residence time, the experiment involved repeated passages of the material through the tribocharger. The effect of the high potential applied to the electrodes on the separation efficiency was also studied, and the results demonstrate the possibility to attain purity levels exceeding 98 %. Finally, the experiments conducted at three different humidity levels of the ambient air demonstrate that this factor has a detrimental effect on the outcome of the tribo-electrostatic separation.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"134 ","pages":"Article 104046"},"PeriodicalIF":1.9,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of swirl-flow generation by two-stage EHD pumps with three configurations using anchored electrodes","authors":"S.-C. Lin ,&nbsp;B.-L. Huang ,&nbsp;F.C. Lai","doi":"10.1016/j.elstat.2025.104043","DOIUrl":"10.1016/j.elstat.2025.104043","url":null,"abstract":"<div><div>— The present study examines the performance of a two-stage electrohydrodynamic (EHD) gas pump with its electrodes assembly anchored at one corner of the channel to enhance flow mixing inside a channel. The present study is intended to confirm that, given the same number of emitting electrodes, the performance of an EHD pump can be improved by rearranging the location and orientation of the electrodes to modify the flow characteristics and achieve the desired effect. To this end, three electrode configurations are considered; aligned, partially offset, and fully offset. For all pumps considered, the emitting electrodes are flush mounted on the channel walls so that the air flow produced is similar to that of a wall jet. Through the performance assessment, the results obtained from the present study can provide useful information for practical applications of EHD gas pumps.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"134 ","pages":"Article 104043"},"PeriodicalIF":1.9,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrodynamic dust removal technologies for solar panels: A comprehensive review","authors":"Hiroyuki Kawamoto","doi":"10.1016/j.elstat.2025.104045","DOIUrl":"10.1016/j.elstat.2025.104045","url":null,"abstract":"<div><div>This paper reviews electrodynamic dust shield (EDS) systems used to mitigate dust adhesion and accumulation on optical elements, such as photovoltaic (PV) panels. The EDS system uses an electrodynamic standing wave or travelling wave, generated by applying a two-phase or multi-phase high voltage to parallel line electrodes, to transport charged particles. After presenting a brief history of the research and development of EDS systems, theoretical and numerical investigations are introduced. They elucidate the mechanism of particle dynamics in the electrodynamic field and predict cleaning performance in low-gravity and low-pressure environments on the Moon and Mars. Subsequently, the paper presents the system configuration, including a cleaner plate and power supply, and fundamental characteristics, including the effects of electrode configuration, applied voltage and frequency, and environmental conditions. It also describes the current status of two primary applications of EDS systems: the cleaning of dust deposited on large-scale PV panels used in solar power generation plants and the cleaning of optical elements, such as PV panels, thermal radiators, lenses, and mirrors mounted on rovers for lunar and Martian exploration. In addition, future challenges are discussed, and other space applications are introduced, such as cleaning of spacesuits, transport and particle-size classification of lunar regolith for the in-situ resource utilization, and sampling of regolith and water ice particles on the Moon and asteroids.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"134 ","pages":"Article 104045"},"PeriodicalIF":1.9,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143463578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of the charging characteristics of MgO powder in the feeding tube of a mineral insulated cable filling device","authors":"Jialiang Chi,&nbsp;Jinjun Wang,&nbsp;Meixuan Su,&nbsp;Yao Zhao,&nbsp;Zhiqiang Wang","doi":"10.1016/j.elstat.2025.104039","DOIUrl":"10.1016/j.elstat.2025.104039","url":null,"abstract":"<div><div>During the filling process of mineral insulated cables, MgO powder particles undergo tribocharging within the feeding tube, leading to charge accumulation on the surface and inside the powder. This results in a reduction in compactness of the powder, which subsequently affects the insulating properties of mineral insulated cables. The research on the phenomenon of tribocharging within the feeding tube is still insufficient. In order to address the aforementioned issues, the discrete element method (DEM) is used to construct a theoretical model and the EDEM simulation software is employed to examine the tribocharging process of MgO powder within the feeding tube. Then experiments are utilized to ascertain the influence of the tube's tilting angle and particle size on the charge-to-mass ratio of MgO powder particles. The results show that both the tilt angle of the feeding tube and the MgO particle size are proportional to the charge-to-mass ratio of the MgO powder.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"134 ","pages":"Article 104039"},"PeriodicalIF":1.9,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143350737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recent advances in the electrostatic separation of particulate matter","authors":"Lucian Dascalescu ,&nbsp;Thami Zeghloul ,&nbsp;Karim Medles ,&nbsp;Alexandru Iuga","doi":"10.1016/j.elstat.2025.104036","DOIUrl":"10.1016/j.elstat.2025.104036","url":null,"abstract":"<div><div>Since the middle of the last century, the electrostatic separation imposed itself as a standard technology in mineral beneficiation. During the last 40 years, it has been more and more widely applied for the recycling of valuable materials (metals, plastics) from industrial wastes. The present paper was aimed to review several recent solutions developed by the authors to surpass several major technical challenges: (i) push the limits of the existing electrostatic separation applications in the recycling industry, in terms of hourly throughput, recovery and purity of the products; (ii) process more complex granular or powdery mixtures, including brominated plastics, and flake-like materials; (iii) recover textile fibers from shredded waste. Described in this short review are: (i) a newly patented modular multi-functional electrostatic separator; (ii) an original procedure for the tribo-electrostatic separation of ternary mixtures of plastics containing brominated flame retardants; (iii) a modified industrial installation for the tribo-electrostatic separation of polyethylene and polystyrene flakes from packaging waste; (iv) a patent-pending equipment for the recovery of PET fibers from end-of-life tires. Research should continue to expand the application of the electrostatic separation in at least the following areas: (i) recycling of composite materials; (ii) recovery of fine powders in food and pharmaceutical industry; (iii) extracting high-value metals from micronized waste electric and electronic equipment.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"134 ","pages":"Article 104036"},"PeriodicalIF":1.9,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143463577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The influence of barrier discharge by microplasma drug delivery system probe on cell viability and intracellular drug absorption","authors":"Abubakar Hamza Sadiq ,&nbsp;Jaroslav Kristof ,&nbsp;Md Jahangir Alam ,&nbsp;Sadia Afrin Rimi ,&nbsp;Yoshinori Mizuno ,&nbsp;Takumi Okada ,&nbsp;Kazuo Shimizu","doi":"10.1016/j.elstat.2025.104040","DOIUrl":"10.1016/j.elstat.2025.104040","url":null,"abstract":"<div><div>One of plasma medicines greatest accomplishments is the non-invasive drug delivery to cells, tissue, and small animals. Little to no reports has been recorded for intranasal drug delivery with air microplasma at atmospheric condition. This study presents a new design of dielectric barrier discharge microplasma referred to microplasma drug delivery system (DDS) probe for delivery of high molecular weight into DBC1.2 cell line. It is designed by winding a thin wire electrode (ground) around another thin wire electrode (high voltage) coated with a dielectric material. At room condition, the discharge characteristics of this reactor is investigated by activating the peak-to-peak voltage sine waveform. The frequent discharge current affects the dominance of the plasma discharge. The discharge power when the probe is activated at 2 kV, 3 kV, 4 kV, is evaluated, along with its impact on pH of the culture medium, ozone concentration and hydroxyl radicals generated in the medium. Furthermore, the impact of the discharge on cellular processes like growth and viability is accessed alone and during the delivery of FD-70 and FD-150 (MW:70 kDa and 150 kDa) through the intracellular membrane of the cell line. A high delivery of drug was observed in 3 kV and 4 kV discharge voltage. The highest delivery was recorded in 4 kV while 2 kV had similar drug uptake as control. The result of cell growth and viability suggests that the discharge does not show negative impact but rather within the concentration that regulate cellular processes leading to drug permeation and cell growth.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"134 ","pages":"Article 104040"},"PeriodicalIF":1.9,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143348209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}