Journal of Electrostatics最新文献

{"title":"Electrostatic potential of a uniformly charged annulus: A study of dimensional crossover","authors":"J. Ricardo de Sousa ,&nbsp;Marcio Gomes ,&nbsp;Orion Ciftja","doi":"10.1016/j.elstat.2025.104152","DOIUrl":"10.1016/j.elstat.2025.104152","url":null,"abstract":"<div><div>We present a comprehensive analysis of the nature of the electrostatic potential generated by a uniformly charged annulus. The annulus, namely, the annular disk is characterized by an outer radius, <span><math><mi>a</mi></math></span> and an inner radius, <span><math><mrow><mi>b</mi><mo>=</mo><mi>η</mi><mspace></mspace><mi>a</mi></mrow></math></span> where <span><math><mrow><mn>0</mn><mo>≤</mo><mi>η</mi><mo>≤</mo><mn>1</mn></mrow></math></span> is a dimensionless parameter which enables a continuous interpolation between a disk (<span><math><mrow><mi>η</mi><mo>=</mo><mn>0</mn></mrow></math></span>) and a ring (<span><math><mrow><mi>η</mi><mo>→</mo><mn>1</mn></mrow></math></span>). The goal is to investigate the geometric transition between two-dimensional (disk-like) and one-dimensional (ring-like) electrostatic behavior. The electrostatic potential created by the uniformly charged annulus is expressed in terms of <em>complete elliptic integrals of the first kind</em> and we explicitly analyze its behavior on its plane. We show that for all nonzero values of parameter <span><math><mi>η</mi></math></span> the resulting electrostatic potential develops a pronounced maximum at a given radial position located within the annular region. As <span><math><mi>η</mi></math></span> increases, this peak becomes sharper and shifts outward towards the outer radius. To quantify this geometric transition, we analyze the potential at the edge as a function of the annular thickness parameter, <span><math><mrow><mi>δ</mi><mo>=</mo><mi>a</mi><mo>−</mo><mi>b</mi><mo>=</mo><mrow><mo>(</mo><mn>1</mn><mo>−</mo><mi>η</mi><mo>)</mo></mrow><mspace></mspace><mi>a</mi></mrow></math></span>. Our analysis reveals a <em>dimensional crossover</em> at a critical thickness <span><math><mrow><msub><mrow><mi>δ</mi></mrow><mrow><mi>c</mi></mrow></msub><mo>=</mo><mn>0</mn><mo>.</mo><mn>59</mn><mspace></mspace><mi>a</mi></mrow></math></span> identified by looking at the features of the second derivative of such potential with respect to <span><math><mi>δ</mi></math></span>. The potential exhibits positive curvature for <span><math><mrow><mi>δ</mi><mo>&lt;</mo><msub><mrow><mi>δ</mi></mrow><mrow><mi>c</mi></mrow></msub></mrow></math></span> reflecting a concentration of charge near the edge, typical for a uniformly charged ring. Conversely, the potential displays zero curvature for <span><math><mrow><mi>δ</mi><mo>&gt;</mo><msub><mrow><mi>δ</mi></mrow><mrow><mi>c</mi></mrow></msub></mrow></math></span>, with features that are more akin to a uniformly charged disk. This curvature-based approach offers a physically transparent and computationally accessible criterion for distinguishing between ring-like and disk-like electrostatic behavior.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"138 ","pages":"Article 104152"},"PeriodicalIF":2.1,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144851905","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":"Enhanced electric discharge in a dual AC powered packed-bed DBD reactor for benzene degradation","authors":"Kefeng Shang,&nbsp;Lei Guo,&nbsp;Zitong Yang,&nbsp;Xiaoran Fan","doi":"10.1016/j.elstat.2025.104155","DOIUrl":"10.1016/j.elstat.2025.104155","url":null,"abstract":"<div><div>A novel volume-surface packed-bed DBD (V-S PDBD) reactor powered by two separate power generators was designed for degradation of benzene. Porous ceramic pellets modified by BaTiO₃ coating (BaTiO₃/PC) generated more current pulses compared to glass, nonporous and porous ceramic pellets, etc., and the equivalent dielectric capacitance and the transferred charges in the reactor packed with BaTiO₃/PC were 1.3 times and 1.2 times higher than empty V-S DBD reactor, implying the production of micro-discharges in pores of packed pellets and the polarization of BaTiO₃ coating enhanced the electric discharge intensity. The highest degradation efficiency of benzene in V-SDBD reactor packed with BaTiO₃/PC pellets (75 μm pore size) reached 69.5 % with an energy efficiency 1.54 g/kWh.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"138 ","pages":"Article 104155"},"PeriodicalIF":2.1,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144809457","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":"Triboelectrostatic beneficiation of solid-solid particles: Charge measurement and particle trajectory","authors":"Aditya Kumar ,&nbsp;Vikky Anand","doi":"10.1016/j.elstat.2025.104150","DOIUrl":"10.1016/j.elstat.2025.104150","url":null,"abstract":"<div><div>The triboelectrostatic separation process is suitable for various industries, including minerals, mining, and cement. In this study, a vertical gravitational electrostatic chamber is designed, and an initial attempt has been made to separate silica particles from five different compositions of raw materials. It was observed in the charge measurement experiment that the magnitude and order of charge increased as the DC voltage increased from 0 to 1000 V. At 0 V, a negative charge was observed for CE-1 sample without tribocharging, at around -5E-8 C, but as the electric field increased, all the measurements observed were positively charged, in the range of 1E-8 to 4E-8 C. In the particle trajectory experiment, the sample CE-2 demonstrated the highest deflection among all the materials.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"138 ","pages":"Article 104150"},"PeriodicalIF":2.1,"publicationDate":"2025-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144757198","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":"Triboelectrification of dielectric material in the lunar environment","authors":"Mengyao Li ,&nbsp;Qing Xia ,&nbsp;Minghui Cai ,&nbsp;Liangliang Xu ,&nbsp;Tao Yang ,&nbsp;Xinyu Jia","doi":"10.1016/j.elstat.2025.104112","DOIUrl":"10.1016/j.elstat.2025.104112","url":null,"abstract":"<div><div>China's lunar exploration, including Chang'e−6, aims for future manned missions and a research station. The lunar environment and human activity, such as friction between rovers, spacesuits, and lunar dust, pose serious charging hazards, potentially generating voltages in the kilovolt range. This paper investigates the frictional charging effects between materials and simulated lunar dust under vacuum, UV light, and varying temperatures. Experimental results show that Teflon can be charged to −375 V in vacuum, −200 V under UV light, and −39 V in the atmosphere. Triboelectrification at different temperatures reveals the most severe charging occurs at −50 °C, reaching −1975 V. These findings provide insights into potential charge and discharge risks for future lunar missions.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"138 ","pages":"Article 104112"},"PeriodicalIF":2.1,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144750650","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":"Estimation of the charge density of a liquid from the surface potential of an insulating container","authors":"Atsushi Ohsawa ,&nbsp;Laurence G. Britton ,&nbsp;Mikio Ohuchi ,&nbsp;Jeremy Smallwood ,&nbsp;Wolfgang Schubert ,&nbsp;Paul Holdstock ,&nbsp;Tomofumi Mogami ,&nbsp;Kazuki Minemura","doi":"10.1016/j.elstat.2025.104134","DOIUrl":"10.1016/j.elstat.2025.104134","url":null,"abstract":"<div><div>This paper proposes a method for estimating the charge density of liquid entering insulating containers. The validity of this method is investigated using a computational model which calculates the potential distributions within domains involving insulating containers containing conductive or insulating liquids. The model demonstrates that, for conductive liquids, the charge density can be estimated from the potential outside the containers. As the model can also estimate the liquid potential, it can be used to evaluate the possibility of a spark discharge and its energy. However, the model shows that, for insulating liquids, the method is not suitable for estimating the charge density in the early stages of the filling. Nevertheless, in the steady state, the potential outside the containers approaches that of the liquid surface at the centre of the containers.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"138 ","pages":"Article 104134"},"PeriodicalIF":2.1,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144750651","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":"Indoor air purification using electrostatic fields without traditional air circulation","authors":"Toni Viheriäkoski ,&nbsp;Pasi Tamminen ,&nbsp;Jarmo Pöllänen ,&nbsp;Paul Holdstock ,&nbsp;Jeremy Smallwood","doi":"10.1016/j.elstat.2025.104127","DOIUrl":"10.1016/j.elstat.2025.104127","url":null,"abstract":"<div><div>Electrostatic air purification is typically based on air circulation through an electrostatic filtering system. In contrast, this study explores the direct removal of airborne particles from an emission source using electrically charged attraction panels. The charge relaxation of particles appears to be sufficiently long in low-humidity conditions, where dust and other charged particles are more easily released into the air. The results indicate that the method can be useful in environments where airborne particles are naturally charged and released, for example, by moving objects or people. Unlike conventional systems, electrostatic purification without air circulation requires minimal energy, making it a cost-efficient and suitable for environments with limited air exchange. This research includes airborne concentration tests and contamination experiments examining the effects of electrostatic fields on electrically charged panels, demonstrating the potential of this simple yet effective technology for various indoor applications.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"138 ","pages":"Article 104127"},"PeriodicalIF":2.1,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144739550","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":"Experimental study on the optimization of electrostatic precipitator performance of crenelated dust collection plate","authors":"Ding Houcheng,&nbsp;Zhang Wenjing,&nbsp;Chen Zhenyang,&nbsp;Deng Quanlong,&nbsp;Zhang Xiaoyu,&nbsp;Liu Peizheng,&nbsp;Yang Yu","doi":"10.1016/j.elstat.2025.104149","DOIUrl":"10.1016/j.elstat.2025.104149","url":null,"abstract":"<div><div>To investigate the influence of dust-collecting plate structures on electrostatic precipitators (ESPs), an experimental approach was employed to compare the dust removal performance of four plate types—flat plate, triangular plate, corrugated plate, and crenelated plates (CrPs)—under varying wind speeds and voltages for optimal selection. The wavelength(λ) and amplitude(A) parameters of the optimal crenelated plate were further optimized, and its dust removal efficiency for different particle sizes was explored. Results show that the crenelated plate effectively improves electric field distribution and enhances corona discharge, demonstrating the best dust removal performance. Compared with flat plates, crenelated plates with different wavelengths and amplitudes significantly improve efficiency under various voltage and wind speed conditions, with amplitude exerting a more pronounced effect than wavelength. The optimal performance is achieved by a crenelated plate with 150 mm wavelength and 60 mm amplitude. Dust removal efficiency increases with particle size, reaching 82.49 % for 3 μm and 99.34 % for 20 μm particles at 50 kV and 0.5 m/s. The findings provide a reference for the design of electrode plate structures in practical applications.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"138 ","pages":"Article 104149"},"PeriodicalIF":2.1,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723667","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":"Automated waveform optimization for electroaerodynamic actuators using Genetic Programming Algorithms","authors":"Cristhian Zárate Evers ,&nbsp;Thomas Duriez ,&nbsp;Guillermo Artana","doi":"10.1016/j.elstat.2025.104135","DOIUrl":"10.1016/j.elstat.2025.104135","url":null,"abstract":"<div><div>This study utilizes Genetic Programming to optimize voltage waveforms for electroaerodynamic actuators, maximizing electromechanical power conversion efficiency. We evaluate mechanical power via net kinetic energy fluxes and dissipation within a control volume, and address accurate electrical power estimation for non-sinusoidal waveforms. We developed an automated experimental chain to generate the more than 1000 waveforms needed for convergence. Asymmetric waveforms, with different positive and negative cycle durations and high form factors, outperform sinusoidal waveforms by 80%. The optimized waveforms reduce power consumption, minimize power transfer to fluctuating fields, and reduce the amount of internal dissipation relative to net kinetic power.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"138 ","pages":"Article 104135"},"PeriodicalIF":1.9,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144713848","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":"Assessing the significance of surface electric potential values displayed by a non-contact electrostatic voltmeter in five situations of practical interest","authors":"Nesrine Amiour,&nbsp;Thami Zeghloul,&nbsp;Mohamed Sofiane Bendilmi,&nbsp;Lucien Dascalescu","doi":"10.1016/j.elstat.2025.104130","DOIUrl":"10.1016/j.elstat.2025.104130","url":null,"abstract":"<div><div>Accumulation of electric charges, which is advantageously used in various industrial applications, can also be a major source of damage for the electronic devices and systems. Electric field or potential measurements can directly assess the electrostatic hazard, i.e. to evaluate the risks associated with electric charge generation, accumulation, and discharge in various circumstances. The aim of this work was to assess the significance of the results of electric potential measurements carried out with the non-contact probe of an electrostatic voltmeter at the surface of insulating bodies, in configurations that mimic various situations of practical interest, more particularly those related to monitoring of charge build-up in operating pneumatic transportation pipes for particulate matter or in the various elements of vacuum cleaners (floor brush/roller, telescopic tube, hose, dust collector, …). The experiments were conducted with corona-charged 25 cm² square-shaped polypropylene (PP) slabs and mm-sized granules. The PP slabs were placed in various positions with respect to the ground and to the non-contact probe. In two situations, the charged PP granules were in or moved through the airgap between the slab and the grounded electrode. The results show that the non-contact probe can detect each change of situation, as the potential measured by the electrostatic probe is the superposition of the effects produced by two charge distributions, on the slab and on the granules.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"138 ","pages":"Article 104130"},"PeriodicalIF":1.9,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144695052","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":"Numerical simulation of metal aerosol electrostatic collection based on CFD","authors":"Yizhe Luo ,&nbsp;Hongliang Li ,&nbsp;Chang Liu ,&nbsp;Zebang Tan ,&nbsp;Xuwei Zeng ,&nbsp;Hui Yang ,&nbsp;Jian Shan","doi":"10.1016/j.elstat.2025.104137","DOIUrl":"10.1016/j.elstat.2025.104137","url":null,"abstract":"<div><div>In order to solve the problem of low collection efficiency of aerosol particles, a model and corresponding optimization strategy were constructed by using COMSOL Multiphysics simulation and analysis. In this study, the finite element method in COMSOL Multiphysics was used to simulate the impact of various radon progeny metal aerosol particle sizes on the flow and electric fields. The metal aerosol was generated using a method that combines fluid flow and electric fields for collection. The model optimizes collection by selecting the right flow velocity (10.0–400.0 mm/s) and voltage (5.0 kV) for the electric field in the collection chamber, which enhances particle aggregation. After the particles are further charged using an electroneedle, they accumulate on the cathode plate, as the flow velocity increases, the collection efficiency is enhanced in the middle and diminishes at the edges, and it is more effective for smaller particle sizes. The simulation results depict the flow and electric field distributions of aerosol particles with varying sizes. By integrating this approach with aerosol simulations, a new strategy to enhance the electrostatic collection efficiency of metal powder is developed.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"138 ","pages":"Article 104137"},"PeriodicalIF":1.9,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679760","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}