Journal of Electrostatics最新文献

{"title":"Improving the efficiency of tribo-electrostatic separation of textile fibers from shredded end-of-life hoses","authors":"Imed-Eddine Achouri ,&nbsp;Thami Zeghloul ,&nbsp;Karim Medles ,&nbsp;Thomas Simonelli ,&nbsp;Lucian Dascalescu","doi":"10.1016/j.elstat.2025.104081","DOIUrl":"10.1016/j.elstat.2025.104081","url":null,"abstract":"<div><div>Typical recycling steps of end-of-life hoses (ELH) include several shredding operations to reduce their size and break down their constituents. Subsequently, various processes such as electrostatic separation or other sorting methods may be employed to recover the constituent materials, which can be reused in new products, thus helping to reduce waste and conserve natural resources. The objective of this study was to validate the possibility of using a newly-patented tribo-electrostatic separator to sort the Polyethylene Terephthalate (PET) fibers and Polyurethane (PU) grains that compose the product obtained after the size-reduction operation of an important class of ELH. The tribo-electrostatic separator consists of a modified rotating-cylinder type triboelectric charger and two pairs of horizontal cylindrical rotating electrodes (length: 460 mm; diameter: 260 mm) connected to two high-voltage sources of opposite polarities (±30 kV), a configuration that is radically different from the standard vertical electrode systems. The initial mixture of shredded ELH, which contained approximately 40 % PET fibers and 60 % PU grains, was introduced into the triboelectric charger, which consists of a cylindrical sieve (length: 460 mm; diameter: 200 mm), rotating at speeds ranging from 5 rpm to 50 rpm. The tribocharger being located in the space between the electrodes, at mid-distance between them, the PET fibers or PU grains are attracted towards the electrodes as soon as they are sufficiently charged or polarized. The tests were carried out using several configurations of the tribocharger, obtained by adding chicanes inside the cylindrical sieve and varying its angle of inclination from 0.2° to 2.5°. Two mixtures of two different sizes, obtained by using two distinct types of shredders were subjected to the tribo-electrostatic separation process. The evaluation of the results was carried out by measuring the mass of the fibers collected at the electrodes and comparing it with the mass of the treated ELH. The tribo-electrostatic separator achieved a PET fiber recovery rate of approximately 25 %, with a purity of around 95 %, performances that make it an efficient solution for the recycling of the polymers contained in this class of waste.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"135 ","pages":"Article 104081"},"PeriodicalIF":1.9,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877536","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":"Simulation-based analysis of electric field characteristics under high-voltage double-circuit and quadrupole overhead transmission lines","authors":"Matiullah Ahsan ,&nbsp;Md Nor Ramdon Baharom ,&nbsp;Ihsan Ullah Khalil ,&nbsp;Zainab Zanial","doi":"10.1016/j.elstat.2025.104080","DOIUrl":"10.1016/j.elstat.2025.104080","url":null,"abstract":"<div><div>This study evaluates the electric field (EF) distribution beneath 132 kV and 275 kV overhead transmission lines (OTLs) and investigates the effects of transmission voltage, line configuration, and conductor transposition. Two-dimensional simulations using ANSYS Electronics at 50 Hz show that the 275 kV OTL produced peak EF values over 800 V/m, compared to 300–400 V/m for the 132 kV OTL. EF intensity was highest directly beneath the conductors, decreasing with distance. Conductor transposition improved voltage balance, resulting in a more uniform EF distribution. Multi-circuit configurations, such as double-circuit 132 kV and quadruple-circuit (275 kV + 132 kV), reduced EF intensity to 400–700 V/m. These findings highlight the role of transmission voltage and line configuration in reducing ground-level EF exposure and optimizing OTL designs for safety and environmental compatibility.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"135 ","pages":"Article 104080"},"PeriodicalIF":1.9,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143847362","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":"Wire-cylinder dielectric barrier discharge for styrene reduction and polymerization into aerosols","authors":"Fada Feng ,&nbsp;Nan Zhong ,&nbsp;Jinping Zhong ,&nbsp;Fushan Wang ,&nbsp;Yikui Zeng ,&nbsp;Zhen Liu ,&nbsp;Keping Yan","doi":"10.1016/j.elstat.2025.104079","DOIUrl":"10.1016/j.elstat.2025.104079","url":null,"abstract":"<div><div>Styrene is a malodorous and toxic gas that poses significant harm to the environment. This paper proposed a dielectric barrier discharge reactor for styrene treatment. The styrene reduction and polymerization were studied. The results showed that the removal efficiency of styrene was 97.9 % at the specific input energy of 25 J/L. The G-value of styrene decomposition was 3.03 molecules per 100 eV. The energy efficiency of plasma-induced styrene removal was 118 g/kWh. The CO₂ selectivity was low, and many aerosols were generated. The oxygen-containing groups imply that the electron-induced radical reactions were key to the degradation and transformation of styrene.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"135 ","pages":"Article 104079"},"PeriodicalIF":1.9,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844480","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":"Coupled space sterilization study of multiple SDBD devices under atmospheric pressure","authors":"Shengmu Huang,&nbsp;Jiachun Li,&nbsp;Junjie He,&nbsp;Cheng Xia,&nbsp;Wenzhang Xu","doi":"10.1016/j.elstat.2025.104069","DOIUrl":"10.1016/j.elstat.2025.104069","url":null,"abstract":"<div><div>In this study, multiple surface dielectric barrier discharge (SDBD) coupled sterilization devices were designed to meet the sterilization requirements of microbial aerosols in dental practices. A multi-electrode structure model was established to simulate the air ionization process, elucidating the spatial distribution of active species and the external electric field during ionization. The predominant positive and negative ions formed were O₄⁺ and O₂⁻, respectively, with number densities reaching up to 10¹⁸ m⁻³. Electrostatic simulation results indicated a uniform distribution of potential and electric fields within the device, offering critical insights for optimizing the arrangement of multiple generators. An experimental platform integrating multiple SDBD devices was also established to conduct sterilization experiments on Staphylococcus aureus and Escherichia coli, while comparing the sterilization performance of single-layer and double-layer configurations. The single-layer sterilization device could achieve 99.9 % sterilization rate in 30 min, and the double-layer generator sterilization device could achieve more than 99.99 % in 20 min.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"135 ","pages":"Article 104069"},"PeriodicalIF":1.9,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844479","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":"Performance analysis of lateral sliding mode triboelectric nanogenerators for self-powered healthcare applications","authors":"Nitinkumar Anekar ,&nbsp;Preetam Selmokar ,&nbsp;Nitin Satpute","doi":"10.1016/j.elstat.2025.104074","DOIUrl":"10.1016/j.elstat.2025.104074","url":null,"abstract":"<div><div>In the sphere of healthcare, self-powered sensing and energy collection have been revolutionized by triboelectric nanogenerators. The integration of small-scale energy devices has resulted in significant enhancements to health and quality of life in implanted biomedical electronics. This article specifically addresses planar lateral sliding mode triboelectric nanogenerators. The output performance of an lateral sliding mode can be affected by factors such as the dielectric layer thickness, electrode thickness, dielectric constant, surface area, surface charge density, weight of the structure and other environmental factors. This study analyzes the intrinsic electrical output of the lateral sliding mode, such as the open-circuit voltage, capacitance, short-circuit charge, energy, efficiency and stability with biocompatibility. The results showed that triboelectric nanogenerators with thin dielectric films exhibit higher voltage, charge, and energy than those with thicker dielectric materials. Additionally, the performance of the triboelectric nanogenerators was influenced by maintaining a constant positive layer thickness and varying the negative layer thickness. Moreover, different electronegative films in triboelectric nanogenerators based on dielectric constants produced the best electrical output during relative dielectric constant testing. The lateral sliding mode modeling and simulations were performed using MATLAB software, which was used for the design, material selection, and stationary study of healthcare devices. This work provides a practical framework for utilizing the triboelectric effect in various healthcare equipment to generate energy from low-vibration human movement. The biocompatibility, light weight, and small size of triboelectric nanogenerators make it a promising technology for enhancing life and health in the future.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"135 ","pages":"Article 104074"},"PeriodicalIF":1.9,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835096","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 and experimental study of the negative corona charging process on a wire-to-wire electrode in a steam jet","authors":"Wei Zhan,&nbsp;Lanjun Yang","doi":"10.1016/j.elstat.2025.104076","DOIUrl":"10.1016/j.elstat.2025.104076","url":null,"abstract":"<div><div>This study investigated the influence of wire-to-wire electrode structures and steam conditions on corona discharge behavior and the charging characteristics of steam jets. The corona discharge current, charge-to-mass ratio of the steam jet, and droplet size distribution near the electrode were measured. The temperature and velocity distributions along the central axis of the steam jet were determined using empirical formulas. A joint model of corona unipolar particles and field-induced charging along the jet axis was developed and the numerical results closely matched experimental data. The findings revealed that variations in water vapor content around the corona electrode significantly affected corona currents. Specifically, higher water vapor mass fractions resulted in reduced corona discharge currents. Particle size measurements indicated that steam jets with higher Reynolds numbers generated smaller droplets in greater quantities. Larger droplets moving in the steam jet accumulated higher charges, but the charge-to-mass ratio decreases with increasing droplet size. Notably, the distribution of droplet sizes was a critical factor influencing the charging characteristics of steam jets. A steam jet with a higher Reynolds number achieved a charge-to-mass ratio of up to 2.17 mC/kg, demonstrating its enhanced charging capacity.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"135 ","pages":"Article 104076"},"PeriodicalIF":1.9,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829382","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":"Using DBD plasma actuator to enhance the performance of a reversible axial fan-A numerical approach","authors":"Hajar Eftekhari Dafchahi,&nbsp;Nima Amanifard,&nbsp;Hamed Mohaddes Deylami","doi":"10.1016/j.elstat.2025.104077","DOIUrl":"10.1016/j.elstat.2025.104077","url":null,"abstract":"<div><div>This study regards the performance improvement of a reversible axial fan using dielectric barrier discharge (DBD) plasma actuator. A three-dimensional numerical approach is employed to analyze the flow structure and the fan performance map. The findings highlight that tip leakage and hub vortices contribute to instability at low flow rates. Applying DBD plasma actuators has caused the stall flow coefficient <span><math><mrow><mo>(</mo><mrow><mi>Φ</mi><mo>=</mo><mn>0.165</mn></mrow><mo>)</mo></mrow></math></span> to move toward lower flow coefficient <span><math><mrow><mo>(</mo><mrow><mi>Φ</mi><mo>=</mo><mn>0.155</mn></mrow><mo>)</mo></mrow></math></span> in the controlled state. So, the fan stall margin has been expanded up to 6.45 %. Also, the static pressure rise near the stall was increased, and the static efficiency improved by 11 %.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"135 ","pages":"Article 104077"},"PeriodicalIF":1.9,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823329","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":"Similarities and differences in electrocoalescence processes of conducting uncharged droplets at the DC and pulsed voltage","authors":"P.A. Kostin,&nbsp;B.A. Chernykh,&nbsp;A.V. Samusenko,&nbsp;V.A. Chirkov","doi":"10.1016/j.elstat.2025.104072","DOIUrl":"10.1016/j.elstat.2025.104072","url":null,"abstract":"<div><div>This article investigates the electrical coalescence processes under pulsed DC voltage. The study aims to provide a physical explanation for the effect of voltage frequency on electrocoalescence and to compare it with constant DC voltage to identify differences and assess the potential advantages of pulsed DC voltage in electrostatic dehydration. A numerical model based on the arbitrary Lagrangian–Eulerian method is employed to simulate the electrocoalescence process. The model accounts for the behavior of a two-phase system consisting of a dielectric dispersion medium (oil) and a conductive dispersed phase (water). The results indicate that, in both the high-frequency range above the characteristic frequency of droplet oscillations and the extremely low-frequency range, the electrocoalescence process behaves similarly to the case with constant DC voltage. However, in the frequency range near the characteristic frequency, a slight increase in the threshold for the transition from coalescence to non-coalescence is observed, due to the temporary absence of voltage following the formation of a bridge between droplets. Nevertheless, this threshold increase is limited to approximately 5 % and remains probabilistic, as it depends on the phase of the voltage signal at the moment of contact. Additionally, at the characteristic frequency, coalescence results in the formation of smaller droplets rather than larger ones, negatively impacting the overall efficiency of the cleaning process.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"135 ","pages":"Article 104072"},"PeriodicalIF":1.9,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800384","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":"Optimized electromechanical compensation for electric and magnetic field mitigation near overhead transmission lines using genetic algorithm","authors":"Eslam Mohamed Ahmed ,&nbsp;Khaled Hosny Ibrahim","doi":"10.1016/j.elstat.2025.104070","DOIUrl":"10.1016/j.elstat.2025.104070","url":null,"abstract":"<div><div>This paper describes a new Electromechanical Compensation (EMC) approach for reducing electric and magnetic fields near overhead transmission lines. The suggested method combines mechanical rearrangement of power conductors with passive-reactive compensation, utilizing a Genetic Algorithm (GA) to optimize conductor placements and reactor settings, therefore reducing electromagnetic field (EMF) intensity. In the proposed research, OTL mechanical rearrangement is improved using electrical compensation. The electrical compensation is implemented by inserting a combination of reactive series and shunt elements in each phase, creating an imbalance in voltage and current. The concept of the proposed technique depends on the fact that the electric and magnetic fields resulting from balanced three-phase voltages and currents, respectively, are negligible as the separation among phases is too tiny since, at this time, the electric and magnetic field vectors are almost in the same direction and have zero-sum as the sum of their corresponding three-phase voltages and currents is zero. The electric and magnetic fields were computed using simulation techniques such as charge simulation and the Biot-Savart law. Simulation results show considerable reductions in both fields, with electric and magnetic field mitigations of over 52 % and 47 %, respectively, compared to a mechanical rearrangement-only strategy. The results demonstrate the effectiveness of the EMC approach in improving environmental safety while retaining system performance.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"135 ","pages":"Article 104070"},"PeriodicalIF":1.9,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769149","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":"A novel algebraic topological method-based approach for evaluating stored electrostatic energy and 3D Maxwellian capacitance","authors":"Arun A. D ,&nbsp;Sharat Chandra ,&nbsp;S. Thirunavukkarasu ,&nbsp;M.P. Rajiniganth ,&nbsp;N. Malathi ,&nbsp;M. Sivaramakrishna","doi":"10.1016/j.elstat.2025.104065","DOIUrl":"10.1016/j.elstat.2025.104065","url":null,"abstract":"<div><div>This paper presents a new and first of its kind approach for numerical evaluation of stored electrostatic energy and capacitance using Algebraic Topological Method (ATM). The ATM is an alternative computing technique with certain advantages over conventional methods such as Finite Difference Method, Finite Element Method, and Method of Moments because it can formulate Multiphysics problems using direct discrete forms instead of partial differential equations. As a proof of concept, the approach has been validated in ideal 1D, 2D and 3D capacitors and the relative error was found to be &lt;1 % when compared with corresponding analytical solutions. Further the problems of capacitors with simple 3D geometries were solved and the relative error found to be &lt;3 % using refined mesh. The numerical stability of the proposed approach for different mesh sizes is investigated and the effect of modeling space is also studied in detail. Finally, the applicability of ATM is benchmarked with the Finite Element Method and experimental results in the case of real capacitors used in engineering applications. The results show that the proposed approach holds great potential for advancing the field of capacitor devices design and optimization by means of modeling and virtual prototyping.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"135 ","pages":"Article 104065"},"PeriodicalIF":1.9,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746752","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}