Journal of Electrostatics最新文献_第4页

The discharge mode differences of positive DC corona between silicon and tungsten needles for electrostatic elimination application

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2025-01-12 DOI: 10.1016/j.elstat.2025.104031

Yanyi Wang , Yining Ge , Yong Chen , Li Wang , Xuandong Liu

{"title":"The discharge mode differences of positive DC corona between silicon and tungsten needles for electrostatic elimination application","authors":"Yanyi Wang , Yining Ge , Yong Chen , Li Wang , Xuandong Liu","doi":"10.1016/j.elstat.2025.104031","DOIUrl":"10.1016/j.elstat.2025.104031","url":null,"abstract":"<div><div>This paper investigates the discharge mode differences between non-metallic and metallic needles in the field of electrostatic elimination. An experimental measurement system for needle-plate gap discharge under positive DC voltage is established, and it particularly focuses on discharge characteristics of silicon and tungsten needles with distinct curvature radii. Attributes including pulse repetition frequency, waveform parameters and pulse uniformity in different regimes were investigated quantitatively. Experimental results reveal that, three successive regimes of silicon needle discharge can be observed, including streamer corona, glow discharge, and spark breakdown. Tungsten needle exhibits a sequential transition of streamer corona, filamentary discharge, brush, and spark breakdown. And the streamer corona regime can be further delineated into spontaneous streamer, periodic streamer, and cluster streamer. Additionally, the effect of needle curvature radius on discharge parameters is also obtained. Needles with smaller curvature radius is easier to acquire pulses with high repetition frequency, while the needle with larger curvature radius is more likely to obtain pulses with high amplitude. The disparities in the discharge regimes between silicon needles and tungsten needles can be attributed to the variations in their conductivity properties and the different ways of charge migration and dissipation induced by the spatial electric field. And the discharge needle for electrostatic elimination is recommended to work in the periodic discharge stage with good uniformity and stability.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"134 ","pages":"Article 104031"},"PeriodicalIF":1.9,"publicationDate":"2025-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136278","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

Highly stretchable and mulfunctional sensor based on PVDF-TrFE/Fe3O4 composites nanofibres to discriminate texture characteristics

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2025-01-08 DOI: 10.1016/j.elstat.2025.104029

Peiyuan Wang , Jun Xue , Hong Kong , Jun Zheng , Hongying Tian

{"title":"Highly stretchable and mulfunctional sensor based on PVDF-TrFE/Fe3O4 composites nanofibres to discriminate texture characteristics","authors":"Peiyuan Wang , Jun Xue , Hong Kong , Jun Zheng , Hongying Tian","doi":"10.1016/j.elstat.2025.104029","DOIUrl":"10.1016/j.elstat.2025.104029","url":null,"abstract":"<div><div>Recently, stretchable and flexible sensors that can mimic human skin have received widespread attention. Piezoelectric nanofibres are widely used in biomedical, health detection, human-computer collaboration and motion monitoring due to their flexibility, corrosion resistance and biocompatibility. Herein, a stretchable piezoelectric multifunctional sensor based on PVDF-TrFE/Fe<sub>3</sub>O<sub>4</sub> composite nanofibres and inspired by a serpentine structure is proposed. Moreover, the fabrication method of the flexible stretchable sensor and its working principle are presented in detail. This obtained sensor reveals strong mechanical properties of a superior bending sensing characteristic at diverse bending angles, an ultimate linear sensing pressure of 80 kPa and an excellent frequency sensing range of 1–100Hz. Thus, the serpentine structure allows the sensor to detect not only planar excitation but also to respond multifunctionally to directional bending, pressure and vibration. Additionally, repeatability experiments of the sensor under different sensing characteristics verified the excellent stability and reliability of the sensor. Meanwhile, identification in different texture characteristics can be realized by this sensor. This work offers essential research value and practical significance for the sensor materials, novel structures and wearable applications of stretchable flexible sensors.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"134 ","pages":"Article 104029"},"PeriodicalIF":1.9,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136283","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

Effect of the compensation probe position on the value of the measured potential of a conducting object with constant charge

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2025-01-04 DOI: 10.1016/j.elstat.2024.104028

Adam Pelesz

引用次数: 0

Influence of polarity reversal on interfacial charge formation in multilayer dielectric insulation

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2025-01-03 DOI: 10.1016/j.elstat.2024.104015

Fatiha Rogti

{"title":"Influence of polarity reversal on interfacial charge formation in multilayer dielectric insulation","authors":"Fatiha Rogti","doi":"10.1016/j.elstat.2024.104015","DOIUrl":"10.1016/j.elstat.2024.104015","url":null,"abstract":"<div><div>In this paper, the effect of the polarity on the formation of the interfacial charge between two dielectrics has been investigated. A sandwich structure constituted by two dielectric films Polyethylene (LDPE) and Fluorinated Ethylene Propylene (FEP) was subjected to high DC electric field, and the measurement were performed in case of polarization and depolarization. For reversed polarity effect, the experimental results show that the space charge profiles measured at different voltage polarities are not symmetrical, in particular, has observed the following behavior in dielectric interface configuration Cathode (Al)/LDPE/FEP/Anode (SC) under a positive polarity: negative charge accumulates at the dielectric interface LDPE/FEP.</div><div>The anode configuration (Al)/LDPE/FEP/Cathode (SC) under a negative polaritys: a positive charge accumulates at the dielectric interface LDPE/FEP.</div><div>For the same dielectric inversion of polarization does not give the same amount of interfacial charge, because the quantities of positive interfacial charges (holes) and negative (electrons) depend on the injection electrode (Al). The existence of the interfacial charge is positive or negative.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"134 ","pages":"Article 104015"},"PeriodicalIF":1.9,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136279","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

Mitigating particle-electrode collision in electrostatic separators: A segmented electrode approach

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2025-01-03 DOI: 10.1016/j.elstat.2024.104027

Kimi Imad Eddine , Seddik Touhami , Benhammou Aissa , Lahcen Azzedine , Tilmatine Amar

{"title":"Mitigating particle-electrode collision in electrostatic separators: A segmented electrode approach","authors":"Kimi Imad Eddine , Seddik Touhami , Benhammou Aissa , Lahcen Azzedine , Tilmatine Amar","doi":"10.1016/j.elstat.2024.104027","DOIUrl":"10.1016/j.elstat.2024.104027","url":null,"abstract":"<div><div>Driven by recent progress in electrostatic separation techniques, there is growing interest in their industrial applications, particularly for waste recycling processes. This study investigates the effectiveness of two electrostatic separator configurations, with a particular focus on mitigating particle-electrode collisions, a significant challenge in conventional designs. To address this limitation, a novel segmented electrode configuration is proposed to improve particle sorting efficiency while minimizing collision events. The separation performance has been assessed through a numerical model, with the inclination angles of the electrodes held constant. A final verification of the model has been carried out using a high-speed camera. The Matlab-based numerical model accurately predicts experimental results, validating its suitability for further optimization studies. The results demonstrate the elimination of the charge/mass ratio limitations reported in previous studies, and highlight that electrodes segmentation significantly improves the particles’ deflection with more than <span><math><mrow><mn>38</mn></mrow></math></span> % for the final position with same initial conditions.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"134 ","pages":"Article 104027"},"PeriodicalIF":1.9,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136281","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

Investigation on the transient solution for electrohydrodynamic deformation of droplets in a combined DC electric field and shear flow field

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2025-01-01 DOI: 10.1016/j.elstat.2024.104010

Tahereh Asadollahi, Nadereh Golshan Ebrahimi

引用次数: 0

Electrostatic surface potential stability of corona charged PTFE electret films by some parametric optimization for radiation protection dosimetry

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2025-01-01 DOI: 10.1016/j.elstat.2024.104013

Sahel Rabiee, Mehdi Sohrabi, Hossein Afarideh

引用次数: 0

Effect of high voltage and electrode configuration on the trajectories of metallic particles in roll-type electrostatic separators for granular mixtures

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2025-01-01 DOI: 10.1016/j.elstat.2024.104014

Hakim Moulai , Thami Zeghloul , Noureddine Menad , Lucian Dascalescu

{"title":"Effect of high voltage and electrode configuration on the trajectories of metallic particles in roll-type electrostatic separators for granular mixtures","authors":"Hakim Moulai , Thami Zeghloul , Noureddine Menad , Lucian Dascalescu","doi":"10.1016/j.elstat.2024.104014","DOIUrl":"10.1016/j.elstat.2024.104014","url":null,"abstract":"<div><div>Electrostatic separation is a technique that uses electric field forces exerted on charged or polarized bodies for sorting the constituents of granular mixtures in various domains: minerals beneficiation, food processing, waste recycling, etc. In the case of the specific electrostatic separator that is the subject of this study, the electric field is generated between a rotating-roll electrode, connected to the ground, and a static electrode with inverted S profile connected to a high voltage (HV) supply. This paper is aimed at evaluating the effect of two factors: the high voltage applied between the two electrodes and the distance between them. A high-speed video camera was used to record the trajectories of mm-sized aluminum and copper particles. The visualization of these trajectories provided a better understanding of the dynamics of particles movement in the electric field of the separator. It enabled to adjust the applied high voltage and the inter-electrode distance to avoid the impacts between the fine aluminum particles and the static electrode, while driving the two types of metallic particles into different collecting compartments. The conclusions of the study will be implemented on a pilot-plant roll-type electrostatic separator integrated to the production line of an industrial recycler.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"133 ","pages":"Article 104014"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Not only dielectrophoresis: The crucial role of electrokinetic phenomena in a dielectric particle’s response to an oscillating electric field

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2025-01-01 DOI: 10.1016/j.elstat.2024.104009

Bing-Yang Shih , Senne Fransen , Edmondo Valvo , Kherim Willems , Willem Van Roy , Pol Van Dorpe , Maarten Rosmeulen

{"title":"Not only dielectrophoresis: The crucial role of electrokinetic phenomena in a dielectric particle’s response to an oscillating electric field","authors":"Bing-Yang Shih , Senne Fransen , Edmondo Valvo , Kherim Willems , Willem Van Roy , Pol Van Dorpe , Maarten Rosmeulen","doi":"10.1016/j.elstat.2024.104009","DOIUrl":"10.1016/j.elstat.2024.104009","url":null,"abstract":"<div><div>Dielectrophoresis (DEP) is frequently analyzed in terms of a particle’s effective dipole moment (EDM). However, in a non-uniform oscillating electric field there are other electrokinetic (EK) phenomena, such as induced-charge electrophoresis (ICEP) and higher order corrections to electrophoresis (EP) that contribute to the particle’s time-averaged motion. We analyze the situation for a highly charged dielectric particle with a thick electric double layer for a general non-uniform external field. By applying perturbation theory consistently to the second-order in terms of the external electric field’s strength, we show that the Maxwell stress tensor (MST) evaluated on the particle’s surface naturally includes both DEP and EK effects, whereas the EDM approach only yields the DEP contribution. Notably, when the MST is calculated in the neutral and uniform far field, as opposed to the particle’s surface, this yields only the DEP contribution as given by the EDM. Importantly, electrokinetic phenomena are significant for highly charged dielectric particles and may even dominate the dielectrophoretic response at low frequencies. Under these conditions, the Clausius–Mossotti factor can be a misleading parameter to predict whether a particle is attracted to, or repelled from, regions with a high electric field strength.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"133 ","pages":"Article 104009"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135071","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

Inductive charging – An invisible Menace

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2025-01-01 DOI: 10.1016/j.elstat.2024.104012

David E. Swenson

引用次数: 0