Journal of Electrostatics最新文献_第2页

Numerical study of improving spatial sensitivity uniformity using elliptical electrodes in electrostatic inductive sensor 椭圆电极改善静电感应传感器空间灵敏度均匀性的数值研究

IF 2.1 4区工程技术

Journal of Electrostatics Pub Date : 2026-03-01 Epub Date: 2026-02-24 DOI: 10.1016/j.elstat.2026.104270

T. Hussain , T. Deng , J.R. Pillai , M.S.A. Bradley , W. Kaialy

{"title":"Numerical study of improving spatial sensitivity uniformity using elliptical electrodes in electrostatic inductive sensor","authors":"T. Hussain , T. Deng , J.R. Pillai , M.S.A. Bradley , W. Kaialy","doi":"10.1016/j.elstat.2026.104270","DOIUrl":"10.1016/j.elstat.2026.104270","url":null,"abstract":"<div><div>Electrostatic charging of solid particles has significant impacts on the material bulk properties in powder handling processes. Reliable quantification of how the particles are charged in the powder in terms of charge levels and charge polarity in process requires both high sensitivity and spatial homogeneity of the sensor in the measurements. Classic ring inductive sensor faces a well-known trade-off: a wide electrode improves homogeneity but reduces temporal/axial resolution, while a narrow electrode preserves resolution but suffers from non-uniform sensitivity. This study introduces an elliptical inductive sensor as a geometry-based alternative to the ring. Using a cross-sectional sensitivity simulation model, an elliptical electrode sensor (major axis a = 10 mm, minor axis b = 6 mm) was compared with conventional ring electrodes using quantitative uniformity metrics. Results demonstrate that the elliptical electrode sensor geometry achieves near-homogeneous response (Uniformity Index, UI ≥ 0.9) for electrode axial width, <em>W</em> ≈ a, whereas the ring sensor requires the axial width on the order of the pipe diameter to reach comparable homogeneity. Under identical modelling conditions, the elliptical electrode sensor achieves greater uniformity and reduces centre–edge disparity compared to ring electrodes enabling balanced charge measurements with improved homogeneity and good resolution.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"140 ","pages":"Article 104270"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147398200","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}

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Capacitance and charge density of an open conducting cylinder: Elliptic-kernel integral equation and asymptotics 开导圆柱体的电容和电荷密度：椭圆核积分方程及其渐近性

IF 2.1 4区工程技术

Journal of Electrostatics Pub Date : 2026-03-01 Epub Date: 2026-02-23 DOI: 10.1016/j.elstat.2026.104266

J. Ricardo de Sousa

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Advanced micromachining of SS304 using electrochemical jet machining: Experimental analysis, depth characterization, and process optimization 利用电化学喷射加工先进的微加工SS304：实验分析，深度表征和工艺优化

IF 2.1 4区工程技术

Journal of Electrostatics Pub Date : 2026-03-01 Epub Date: 2026-03-04 DOI: 10.1016/j.elstat.2026.104277

L. Selvarajan , Shailesh Shirguppikar , V.S. Ganachari , Y. Justin Raj , P. Mathan kumar

{"title":"Advanced micromachining of SS304 using electrochemical jet machining: Experimental analysis, depth characterization, and process optimization","authors":"L. Selvarajan , Shailesh Shirguppikar , V.S. Ganachari , Y. Justin Raj , P. Mathan kumar","doi":"10.1016/j.elstat.2026.104277","DOIUrl":"10.1016/j.elstat.2026.104277","url":null,"abstract":"<div><div>A non-conventional micromachining process for creating precise features on difficult-to-machine materials without causing any mechanical and thermal damage to the material is electrochemical jet machining (ECJM). In this research work, the effect of stand-off distance (SOD) and voltage on machining depth and opening formation during the ECJM of SS304 stainless steel material is studied. A 2 M NaCl electrolyte, a nozzle inner diameter of 300 μm, and voltages of 40 V, 50 V, and 60 V with three SODs of 300 μm, 500 μm, and 700 μm were used in the experiment. The optical microscopy was used to measure the machining depth and opening size, and three experimental trials were conducted for each set of parameters to check the repeatability of the results. The result of the experiment revealed that voltage and SOD have a significant effect on machining depth. The depth increased from approximately 380-410 μm at 40 V to 690-710 μm at 60 V at a fixed SOD of 700 μm. The material removal rate was significantly enhanced by reducing the SOD; at 300 μm SOD, the machining depth increased from 685 to 710 μm at 40 V to 840-890 μm at 60 V. The opening size also increased from around 0.536 mm at 40 V and 700 μm SOD to 0.843 mm at 60 V and 300 μm SOD. A comparative study showed that lowering the SOD from 700 μm to 300 μm increased the machining depth by more than 70% for a given voltage. This was because the electric field and current density were higher. The experimental results were found to be reliable and consistent, as there were no variations in the trends. This research measures the influence of SOD and voltage on the depth of drilling with a constant flow rate of electrolyte. The experimental result showed that to achieve machining depth, dimensional accuracy, and efficiency in ECJM of SS304, the optimal selection of voltage and stand-off distance is required.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"140 ","pages":"Article 104277"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147398152","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}

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A steady-state corona discharge simulation method for static discharger based on amplitude increase control of boundary charge density distribution iteration 一种基于边界电荷密度分布迭代增幅控制的稳态电晕放电模拟方法

IF 2.1 4区工程技术

Journal of Electrostatics Pub Date : 2026-03-01 Epub Date: 2026-02-16 DOI: 10.1016/j.elstat.2026.104268

Shanliang Qiu , Zemin Duan , Xiaoliang Si , Zhibao Li , Yanqiong Zhao

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Influence of UV ray from corona discharge on discharge characteristics of ZnO surge arrester with a spark gap 电晕放电紫外线对带火花间隙氧化锌避雷器放电特性的影响

IF 2.1 4区工程技术

Journal of Electrostatics Pub Date : 2026-03-01 Epub Date: 2026-02-16 DOI: 10.1016/j.elstat.2026.104267

May Thin Khaing , Nonoka Hirose , Tatsuya Sakoda , Katsutaka Kubo , Tomikazu Anjiki , Tomoki Chiba

引用次数: 0

Analytical description of the electrostatic field of multiple system based on a conducting circular cylinder 基于导电圆柱体的多系统静电场分析描述

IF 2.1 4区工程技术

Journal of Electrostatics Pub Date : 2026-03-01 Epub Date: 2026-01-22 DOI: 10.1016/j.elstat.2026.104249

I.F. Spivak-Lavrov, T. Zh Shugayeva, A.B. Seiten, A. Sh Amantaeva

{"title":"Analytical description of the electrostatic field of multiple system based on a conducting circular cylinder","authors":"I.F. Spivak-Lavrov, T. Zh Shugayeva, A.B. Seiten, A. Sh Amantaeva","doi":"10.1016/j.elstat.2026.104249","DOIUrl":"10.1016/j.elstat.2026.104249","url":null,"abstract":"<div><div>This study presents the analytical derivation of potential functions characterizing the electrostatic fields of multipole systems based on a conducting circular cylinder, utilizing methods from the theory of complex variable functions.</div><div>Explicit analytical expressions for the field potentials and their derivatives have been obtained, enabling the computational modeling of equipotential lines for various multipolar configurations, including quadrupole, sextupole and octupole systems. The presented results were obtained under the assumption of infinitely narrow insulating gaps between electrodes. Furthermore, an algorithm and a suite of application software were developed to compute the potentials and electric field intensities of multipole systems constructed on the basis of a conducting circular cylinder.</div><div>The results obtained in study can be applied to the design and calculation of charged particle beam transport systems, anti-resonance mass analyzers, and various electrostatic multipole traps, as well as multipole aberration correction in electron microscopy.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"140 ","pages":"Article 104249"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146039241","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}

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Schlieren imagery and velocimetry of electrohydrodynamic heat transfer enhancement in an organic phase change material 有机相变材料中电流体动力传热增强的纹影成像和速度测量

IF 2.1 4区工程技术

Journal of Electrostatics Pub Date : 2026-03-01 Epub Date: 2026-02-24 DOI: 10.1016/j.elstat.2026.104269

Ethan Chariandy , Siwei Liu , Takehiko Sato , Tomoki Nakajima , James S. Cotton

{"title":"Schlieren imagery and velocimetry of electrohydrodynamic heat transfer enhancement in an organic phase change material","authors":"Ethan Chariandy , Siwei Liu , Takehiko Sato , Tomoki Nakajima , James S. Cotton","doi":"10.1016/j.elstat.2026.104269","DOIUrl":"10.1016/j.elstat.2026.104269","url":null,"abstract":"<div><div>The study proposes and demonstrates a methodology for velocity measurement of electrohydrodynamic (EHD) flows that is totally non-intrusive. By using Schlieren imagery in conjunction with optical flow measurement velocity fields are measured in the liquid phase of a phase change material (PCM) under the application of EHD. The test section applied 8, 10, and 12 kV across a differentially heated cavity containing octadecane, at approximately 50% melt fraction. Velocity fields were measured using the schlieren methodology and showed there was a clear jet/recirculation zone pattern with peak velocities approaching 18 mm/s across a 10 mm gap. The error in the velocity field was considered using a 99.7% confidence interval in the averaged velocity. Within the jet region the corresponding relative error was consistently under 10%. The study demonstrates that schlieren imagery is an effective means to visualize non-isothermal EHD fluid phenomena without the intrusion of any measurement devices (seeding particles, anemometers) in the cavity.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"140 ","pages":"Article 104269"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147398203","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}

引用次数: 0

Number of emitting electrodes effect on a two stage electrohydrodynamic gas pump performance 发射电极数对两级电液动力气泵性能的影响

IF 2.1 4区工程技术

Journal of Electrostatics Pub Date : 2026-03-01 Epub Date: 2026-02-28 DOI: 10.1016/j.elstat.2026.104274

A K M Monayem H. Mazumder, Grace S. Trombley, Brendon G. Cousino

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Atmospheric DBD plasma treatment and its impact on the triboelectric charging of model granular polymers 常压DBD等离子体处理及其对模型颗粒聚合物摩擦电荷的影响

IF 2.1 4区工程技术

Journal of Electrostatics Pub Date : 2026-03-01 Epub Date: 2026-03-02 DOI: 10.1016/j.elstat.2026.104273

Badreddine Settaf , Zehira Ziari , Thami Zeghloul , Lucien Dascalescu

{"title":"Atmospheric DBD plasma treatment and its impact on the triboelectric charging of model granular polymers","authors":"Badreddine Settaf , Zehira Ziari , Thami Zeghloul , Lucien Dascalescu","doi":"10.1016/j.elstat.2026.104273","DOIUrl":"10.1016/j.elstat.2026.104273","url":null,"abstract":"<div><div>In this work, the triboelectric charging behavior of non-brominated model polymer particles representative of plastics commonly found in waste electrical and electronic equipment (WEEE): ABS (acrylonitrile butadiene styrene), PC (polycarbonate) and PS (polystyrene) was investigated using a fluidized bed tribocharger. These polymers are widely used in both fundamental research and industrial applications due to their well-characterized properties, thermal stability and availability in granular form. The effects of charging time, tribocharger wall material (PVC and PMMA) and surface modification by dielectric barrier discharge (DBD) plasma treatment were systematically examined. The results show that triboelectric charging is strongly influenced by particle–wall interactions and treatment conditions. With a PVC wall, ABS, PC and PS acquired positive charges that increased to a maximum before decreasing with charging time, while PS exhibited a polarity reversal with a PMMA wall. DBD plasma treatment not only enhanced the magnitude of the triboelectric charge but also induced polarity reversal. FTIR-ATR analysis revealed the introduction of oxygen containing polar functional groups (C=O, <span><math><mo>−</mo></math></span>OH and C<span><math><mo>−</mo></math></span>O) on all treated particles, confirming plasma induced surface oxidation as the mechanism responsible for the observed changes in triboelectric charging dynamics.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"140 ","pages":"Article 104273"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147398206","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}

引用次数: 0

Dielectrophoresis crossover frequencies of yeast mitochondria determined by microscopic observation for evaluating their dielectric properties 用显微观察法测定酵母线粒体的介电特性

IF 2.1 4区工程技术

Journal of Electrostatics Pub Date : 2026-03-01 Epub Date: 2026-02-05 DOI: 10.1016/j.elstat.2026.104248

Michihiko Nakano , Yu Fukuda , Masafumi Inaba , Junya Suehiro

{"title":"Dielectrophoresis crossover frequencies of yeast mitochondria determined by microscopic observation for evaluating their dielectric properties","authors":"Michihiko Nakano , Yu Fukuda , Masafumi Inaba , Junya Suehiro","doi":"10.1016/j.elstat.2026.104248","DOIUrl":"10.1016/j.elstat.2026.104248","url":null,"abstract":"<div><div>Dielectrophoresis (DEP) is an electrokinetic phenomenon caused by the polarization of dielectric particles in a non-uniform electric field. Since DEP behavior is closely linked to the dielectric properties of the target, it can be used to infer these properties. This study investigated the DEP characteristics of yeast mitochondria by observing their DEP crossover frequencies, where DEP-induced motion ceases. Fluorescently stained mitochondria were suspended in media with varying conductivities, and the frequency of an applied voltage was swept to identify the crossover points. Two distinct crossover frequencies were observed, indicating a core-shell structure consistent with mitochondrial morphology. By analyzing these crossover frequencies across different conductivity conditions, we estimated the dielectric properties of individual mitochondrial components. These results demonstrate that DEP-based analysis can be used not only for whole cells but also for organelles, providing new insights into subcellular biophysics and laying the foundation for future studies on organelle-level dynamics.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"140 ","pages":"Article 104248"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146189401","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}

引用次数: 0