Journal of Electrostatics最新文献

{"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}

{"title":"Generation of microdischarge plasma in a pore: Effect of the pulse voltage parameters","authors":"Zitong Yang,&nbsp;Kefeng Shang,&nbsp;Mengji Fu,&nbsp;Na Lu,&nbsp;Nan Jiang,&nbsp;Jie Li","doi":"10.1016/j.elstat.2025.104061","DOIUrl":"10.1016/j.elstat.2025.104061","url":null,"abstract":"<div><div>Porous catalysts have important applications in plasma catalysis processes for nitrogen fixation, chemical synthesis, environmental pollutant treatment, and others. Understanding the generation mechanism of microdischarge in the pores is crucial for designing the catalysts suitable for plasma catalysis processes. In this paper, a two-dimensional fluid model was established to simulate the microdischarge characteristics in a pore at atmospheric pressure, mainly focusing on the effect of pulse voltage parameters, including voltage amplitude, pulse rise time, pulse width and pulse polarity. The results show that the pulse polarity significantly affects the production of microdischarge. Compared with negative pulse voltage, applying positive pulse voltage on the dielectric results in higher gas ionization rate and total ion density, and electron density as well as electron temperature are higher, which can promote the formation of microdischarge in the pore. In addition, high pulse voltage amplitude is more likely to produce microdischarge in a pore, while the pulse rising edge time and pulse width mainly affect electron density and electron energy. With the rise time increasing, the electron density increases significantly, and the electron temperature rises slightly. Moreover, the shorter the pulse width, the higher the electron temperature and electron energy. Higher pulse voltage, shorter pulse rise time and narrower pulse width can result in stronger electric field in and near the pore, benefiting the generation of microdischarge in a pore.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"135 ","pages":"Article 104061"},"PeriodicalIF":1.9,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143687001","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 performance study on the drum-type energy harvesting device based on triboelectric nanogenerator","authors":"Mingfan Li ,&nbsp;Sunyangyang Jin ,&nbsp;Aihua Meng ,&nbsp;Jun Song ,&nbsp;Zhenlong Xu ,&nbsp;Yu Chen ,&nbsp;Yang Zeng","doi":"10.1016/j.elstat.2025.104066","DOIUrl":"10.1016/j.elstat.2025.104066","url":null,"abstract":"<div><div>A drum-type energy harvesting system utilizing a triboelectric nanogenerator (TENG) has been developed to provide power for wireless health monitoring devices. The electrical performance and structural reliability are assessed through simulation. Experiments examine the effect of contact area and vibration acceleration on the electrical output of the electrode pair. Experimental results suggest that the peak-to-peak value of the conversion circuit voltage could reach 39.9 V, and the output power of a single electrode pair for one cycle can reach 17.74 μW. The total output power of the drum-type TENG device, which consists of eight electrode pairs, is 141.92 μW. This paper elucidates a method for powering low-power sensors or arrays of LEDs.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"135 ","pages":"Article 104066"},"PeriodicalIF":1.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143687555","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":"Modeling of the electric field in buccal epithelial cells to determine the electric field strength at the cytoplasm–Nucleus interface","authors":"Anastasiya Rumyantseva ,&nbsp;Anna Borde ,&nbsp;Mikhail Ordzhonikidze ,&nbsp;Artem Izmaylov ,&nbsp;Ludmila Pokidysheva ,&nbsp;Andrey Samorodov ,&nbsp;Sergey Shchukin ,&nbsp;Alexander Volkov","doi":"10.1016/j.elstat.2025.104063","DOIUrl":"10.1016/j.elstat.2025.104063","url":null,"abstract":"<div><div>Buccal epithelial cells are an informative material for assessing the functional state of the human body. The electrokinetic properties of these cells reflect the initial level of inflammation and stress in the body. The article presents a simulation of constant, sinusoidal and bipolar electric field signals.</div><div>As a result, a relationship was obtained between the voltage of the external electric field and the voltage acting on the nucleus of the buccal epithelium cell. The shape of the bipolar signal meets the requirements for conducting a study, since such a signal allows you to fully study the electrokinetic properties.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"135 ","pages":"Article 104063"},"PeriodicalIF":1.9,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143687554","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":"Optimization design of electrostatic adhesion films: Based on theoretical modeling and experimental verification","authors":"Biao Xu ,&nbsp;Xuanqingjiang Wang","doi":"10.1016/j.elstat.2025.104067","DOIUrl":"10.1016/j.elstat.2025.104067","url":null,"abstract":"<div><div>Electrostatic adhesion technology, with its adaptability and low power consumption, shows great potential in spacecraft repair and wall-climbing robots. This study develops a theoretical model of electrostatic adhesion force based on Laplace's equation, analyzing the effects of key parameters such as electrode voltage, insulation layer thickness, electrode width, and spacing. Using LINGO software for optimization design, optimal configurations are determined. An experimental platform was set up to test adhesion force under various parameter configurations. Theoretical and experimental results are highly consistent, verifying the model's accuracy and providing valuable insights for the design and optimization of electrostatic adhesion films.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"135 ","pages":"Article 104067"},"PeriodicalIF":1.9,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143687553","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 Faraday cup for charge measurements in biophysical and environmental fieldwork","authors":"R. Giles Harrison ,&nbsp;Daniel Robert","doi":"10.1016/j.elstat.2025.104062","DOIUrl":"10.1016/j.elstat.2025.104062","url":null,"abstract":"<div><div>A novel miniature (28 mm × 38 mm) shielded Faraday cup is described for quantifying picocoulomb charges on millimetre environmental objects, such as small insects or plants, droplets, dust particles or powders. The electrometer electronics is contained within the device, avoiding any transfer of low level signals to an external electrometer. It is calibrated using a voltage ramp – capacitor method, generating defined charge pulses without a reference electrometer. The device can fit within an acoustic levitator to provide non-contact, zero leakage suspension of small objects, measuring charge on their release. Convenience and simplicity of use open new environmental charge measurement opportunities.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"135 ","pages":"Article 104062"},"PeriodicalIF":1.9,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593164","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}

{"title":"Evaluating the electric field distribution of an excimer laser chamber via three-dimensional simulations","authors":"Zhen Wang ,&nbsp;Jiayi Chen ,&nbsp;Jinbao Liu ,&nbsp;Zhihang Zhao ,&nbsp;Wenjin Zhang ,&nbsp;Yangyang Fu","doi":"10.1016/j.elstat.2025.104058","DOIUrl":"10.1016/j.elstat.2025.104058","url":null,"abstract":"<div><div>The generation of a high-pressure, large-volume, uniform and stable glow discharge is the key technology of the excimer laser, which could be largely affected by the electric field distribution between the electrodes in the discharge chamber. In this work, the spatial distributions of the electric field in an excimer laser discharge chamber with preionization pins (PIPs) are numerically evaluated via a three-dimensional (3D) simulation model. The effects of the number (<span><math><mi>N</mi></math></span>) of pairs of PIPs and their arrangements (symmetrical or staggered) on the inhomogeneity of electric field strength are determined. The results indicate that the presence of PIPs can cause electric field distortion between electrodes, resulting in a wavy distribution. As the number (<span><math><mi>N</mi></math></span>) of pairs of PIPs increases, the electric field strength homogeneity between electrodes can be improved considerably. When the number (<span><math><mi>N</mi></math></span>) of pairs of PIPs is 2 (i.e., <span><math><mrow><mi>N</mi><mo>=</mo><mn>2</mn></mrow></math></span>), the inhomogeneity of the electric field strength (<span><math><mrow><msub><mrow><mi>δ</mi></mrow><mrow><mi>N</mi><mo>=</mo><mn>2</mn><mo>,</mo><mtext>stag</mtext></mrow></msub><mo>=</mo><mn>0</mn><mo>.</mo><mn>183</mn><mtext>%</mtext></mrow></math></span>) with a staggered arrangement is obviously better than that (<span><math><mrow><msub><mrow><mi>δ</mi></mrow><mrow><mi>N</mi><mo>=</mo><mn>2</mn><mo>,</mo><mtext>symm</mtext></mrow></msub><mo>=</mo><mn>0</mn><mo>.</mo><mn>514</mn><mtext>%</mtext></mrow></math></span>) with a symmetrical arrangement. With the PIPs arranged symmetrically, the inhomogeneity of the electric field strength <span><math><mi>δ</mi></math></span> remains below 0.2% when <span><math><mi>N</mi></math></span> <span><math><mo>≥</mo></math></span> 8. These results indicate that the characteristics of the electric field distributions can be influenced by the PIPs in the discharge chamber, which may provide potential insights for the design and optimization of excimer laser devices.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"135 ","pages":"Article 104058"},"PeriodicalIF":1.9,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143579719","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":"Review of the enhanced effect of external electric field on condensation heat transfer","authors":"Dian Li,&nbsp;Yuhang Zhang,&nbsp;Zirui Xu,&nbsp;Jian Wu","doi":"10.1016/j.elstat.2025.104050","DOIUrl":"10.1016/j.elstat.2025.104050","url":null,"abstract":"<div><div>This study provides a comprehensive review of the unique advantages of electric fields in the domain of condensation heat transfer. It analyzes the force dynamics and heat transfer mechanisms of fluids under the influence of electric fields. The review highlights previous work concerning the impact of electric fields on steam condensation on both flat and tubular surfaces. Furthermore, it elaborates on recent advancements in electrowetting technology, which enhances condensation by manipulating droplet dynamics. Key findings are systematically presented in tabular form to clearly illustrate the contributions in this area.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"135 ","pages":"Article 104050"},"PeriodicalIF":1.9,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551930","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}