Journal of Electrostatics最新文献

Optimisation of CuO/AC, Fe2O3/AC synergistic multi-electrode DBD reactor for degradation of ATZ in water 优化用于降解水中 ATZ 的 CuO/AC、Fe2O3/AC 协同多电极 DBD 反应器

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2024-11-28 DOI: 10.1016/j.elstat.2024.104003

Xinjun Shen , Fan He , Jing Zhang , Cong Wang

{"title":"Optimisation of CuO/AC, Fe2O3/AC synergistic multi-electrode DBD reactor for degradation of ATZ in water","authors":"Xinjun Shen , Fan He , Jing Zhang , Cong Wang","doi":"10.1016/j.elstat.2024.104003","DOIUrl":"10.1016/j.elstat.2024.104003","url":null,"abstract":"<div><div>Atrazine (ATZ) is a synthetic triazine herbicide and has become a new pollutant in environment water. In this study, a multi-high-voltage, double-grounded- pole dielectric barrier discharge (DBD) reactor was designed to degrade ATZ in water. The effects of different factors, such as input voltage, air flow rate, and pH, on the degradation of ATZ in the DBD reactor were compared using response surface methodology. The optimal reaction conditions for the degradation of ATZ by DBD were determined by fitting the model to the experiment: air flow rate of 100 L/h, input voltage of 32 kV and pH of 10. The degradation efficiency obtained was 97.89 %, which closely matched the simulation, indicating that the model had good correlation and consistency with the measured data. In this experiment, catalysts such as activated carbon loaded with CuO and Fe<sub>2</sub>O<sub>3</sub> were added to DBD reactor to improve the utilization of active substances and enhance the degradation of ATZ. The catalysts were characterized by FT-IR, XRD, XPS and SEM, proving that they promoted the degradation of ATZ.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"133 ","pages":"Article 104003"},"PeriodicalIF":1.9,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142722611","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

Triboelectric charging of polydisperse particles in a developed pipe flow 发达管流中多分散颗粒的三电充电

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2024-11-26 DOI: 10.1016/j.elstat.2024.103993

Chris Lawn

引用次数: 0

Effect of field emission on contact spark in the spark test apparatus 火花测试仪器中的场发射对接触火花的影响

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2024-11-26 DOI: 10.1016/j.elstat.2024.103995

Luwen Song , Shulin Liu , Dangshu Wang

引用次数: 0

A theoretical approach towards developing space charge formation in lossy dielectrics 开发有损电介质中空间电荷形成的理论方法

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2024-11-22 DOI: 10.1016/j.elstat.2024.103989

Navdeep Batish, Sounak Nandi, Harimurugan Devarajan

引用次数: 0

Numerical study on water and salt transport of electroosmosis in saline soil 盐碱土壤中电渗的水盐迁移数值研究

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2024-11-18 DOI: 10.1016/j.elstat.2024.103992

Wei Wen , Hao Wu , Ling Zeng , Yiyun Jiang , Haitao Yang , Xubin Huang

{"title":"Numerical study on water and salt transport of electroosmosis in saline soil","authors":"Wei Wen , Hao Wu , Ling Zeng , Yiyun Jiang , Haitao Yang , Xubin Huang","doi":"10.1016/j.elstat.2024.103992","DOIUrl":"10.1016/j.elstat.2024.103992","url":null,"abstract":"<div><div>The study investigate water-salt interactions in porous media under electroosmosis. A theoretical model was developed to analyze the effect of salt precipitation on electrical conductivity, permeability, and volumetric capacitance, and to introduce precipitated salt parameters. The model describes water and salt transport through two mass conservation equations and incorporates the charge conservation equation. The model was validated through experiments of other scholars. The experimental results show that salt precipitation and dissolution play an important role in electrical conductivity since salt precipitation decreases drainage efficiency because it reduces hydraulic conductivity. The increase in conductivity of the solution is more important than the decrease in hydraulic conductivity due to salt precipitation because the higher the concentration of the solution, the higher its conductivity. The model suggests that salt plays an important role in electrical conductivity, as evidenced by the prominent nonlinear change in conductivity due to the inhomogeneous transport of solutes. The numerical model helps to predict water and salt transport in the electroosmosis of soils containing saline water.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"132 ","pages":"Article 103992"},"PeriodicalIF":1.9,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142705148","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

Numerical investigation of electric charge measurement by PWP method at solid and liquid interfaces 利用 PWP 方法对固体和液体界面电荷测量的数值研究

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2024-11-13 DOI: 10.1016/j.elstat.2024.103991

V. Berry , L. Zheng , P. Leblanc , S. Holé , T. Paillat

引用次数: 0

Uniform electric-field optimal design method using machine learning 利用机器学习的均匀电场优化设计方法

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2024-11-06 DOI: 10.1016/j.elstat.2024.103990

Zipeng Cheng, Qizheng Ye, Xiaofei Nie, Chengye Li, Wenhua Wu

{"title":"Uniform electric-field optimal design method using machine learning","authors":"Zipeng Cheng, Qizheng Ye, Xiaofei Nie, Chengye Li, Wenhua Wu","doi":"10.1016/j.elstat.2024.103990","DOIUrl":"10.1016/j.elstat.2024.103990","url":null,"abstract":"<div><div>The demand for uniform electric fields (UEFs) in engineering is very high, particularly in high-voltage devices. The existing methods encounter limitations in terms of optimization region and universality. Herein, we propose a method for designing UEFs based on finite element calculations of electromagnetic fields and machine learning. First, the electric-field distribution of the plate-to-plate electrode structure determined using three electrode-shape parameters (ESPs) is calculated using finite element software and is drawn. Thereafter, a dataset of 2000 images is created with different electric-field strength distributions using various ESPs. Net, we employ image-processing techniques to extract nine statistical features from the gray-level information in the images. Models are trained through machine learning to predict ESPs based on the gray-level features (GLFs). Finally, the electric-field strength distribution image of the expected ideal uniform field is artificially selected. In addition, the ESPs from which the uniform electric-field is produced are predicted by the models. The proposed method provides an accurate solution for optimizing the design of a uniform electric-field and a new approach for solving inverse problems of electric-field. This involves drawing the required electric-field strength distribution image for high-voltage engineering and obtaining the required ESPs.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"132 ","pages":"Article 103990"},"PeriodicalIF":1.9,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142594138","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

Numerical simulation of spiked electrode electrostatic precipitator 尖电极静电除尘器的数值模拟

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2024-10-28 DOI: 10.1016/j.elstat.2024.103987

Xiaohua Wang, Hong Su, Biyu Wang, Junyu Tao

引用次数: 0

Ionic wind produced by volume corona discharges and surface dielectric barrier discharges: What role do streamers play? 体积电晕放电和表面介质屏障放电产生的离子风：流线体起什么作用？

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2024-10-24 DOI: 10.1016/j.elstat.2024.103988

Eric Moreau, Nicolas Benard

{"title":"Ionic wind produced by volume corona discharges and surface dielectric barrier discharges: What role do streamers play?","authors":"Eric Moreau, Nicolas Benard","doi":"10.1016/j.elstat.2024.103988","DOIUrl":"10.1016/j.elstat.2024.103988","url":null,"abstract":"<div><div>The present study compares the ionic wind produced by volume DC and AC corona discharges, and by surface dielectric barrier discharges (DBD). On the one hand, in the case of a volume corona discharge ignited between a high-voltage needle and a grounded plate, our measurements highlight that the ionic wind velocity increases in the presence of positive breakdown streamers. On the other hand, in the case of a surface AC DBD, the ionic wind velocity decreases when streamers occur. Why such a difference? The answer is not easy and the debate remains open. However, one answer would be that the streamers occurring in a volume needle-to-plate discharge leave an abundance of positive ions in the inter-electrode space and that these ions drift because of the electric field, just after the streamer propagation. On the other hand, in the case of a surface DBD, the streamers can leave positive ions in their wake but their heads especially deposit positive ions at the location where they stop propagating, <em>i.e.</em> a few millimetres from the electrode (up to about 10–15 mm). Then this positive space charge deposited at a few millimetres from the active electrode edge on the dielectric surface acts as a screen against the electric field due to the applied high voltage, thus preventing the drift of the ions remaining on the surface of the dielectric, close to the electrode edge. Having said that, the reality is that this explanation is certainly very simplistic compared with the very complex phenomena taking place in these two discharges, particularly at the times when the streamers form and propagate.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"132 ","pages":"Article 103988"},"PeriodicalIF":1.9,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142530763","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

Stress due to electric charge density distribution in a dielectric slab 电介质板中电荷密度分布引起的应力

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2024-10-19 DOI: 10.1016/j.elstat.2024.103982

John H.J. Niederhaus , Joel B. Coley , Antonio L. Levy

引用次数: 0