Journal of Electrostatics最新文献

{"title":"Investigation of the photovoltaic effect and tribovoltaic effect at the GaAs semiconductor-liquid interface","authors":"Mesut Yalcin ,&nbsp;Deniz Kadir Takci ,&nbsp;Abuzer Fikret Demirel","doi":"10.1016/j.elstat.2024.103896","DOIUrl":"https://doi.org/10.1016/j.elstat.2024.103896","url":null,"abstract":"<div><p><span><span>Contact electrification (CE) is a physical phenomenon that occurs between two materials. When two materials with different electron affinity are contacted, electrons move along the contacting surfaces due to </span>triboelectrification. The result of this effect is direct current. In this study, the triboelectric current is generated by the bindington energy generated by sliding a water drop on n-type, p-type and GaAs p-n junction. In addition, since the water drop is transparent, it is illuminated with 100 mW/cm</span>²<span> while sliding and tribovoltaic and photovoltaic effects<span> are evaluated together. The fact that the current value obtained was in the order of microampere (μA) showed that GaAs can be used in triboelectric nanogenerators (TENGs).</span></span></p></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139406004","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":"Rolling droplets and partial discharges in AC electric field","authors":"K.D. Poluektova,&nbsp;S.A. Vasilkov,&nbsp;A.V. Slesarenko,&nbsp;A.V. Samusenko","doi":"10.1016/j.elstat.2023.103882","DOIUrl":"https://doi.org/10.1016/j.elstat.2023.103882","url":null,"abstract":"<div><p><span>High-voltage silicone<span> insulators can be used in </span></span>climatic conditions<span> such as rain or fog since they are hydrophobic. However, water droplets lead to discharges, which reduces hydrophobicity of the silicone rubber which is, in turn, is a first step to failure of an insulator. To increase the resistance of the rubber to the discharges, it is necessary to study the discharges between droplets in detail.</span></p><p>The present work is devoted to the study of the loss of hydrophobicity of silicone rubber due to rolling droplets and discharges between them on the inclined silicone rubber sample under AC voltage of 35 kV. An experimental setup used in the work has been developed based on Dynamic Drop Test (DDT) and makes it possible to study discharges only between droplets, and avoid contact of droplets with the electrodes.</p><p>Simultaneous observation of droplets and discharges made it possible to distinguish characteristic events and to divide the loss of hydrophobicity into stages. Experiments showed that the behavior of the droplets changed gradually, while the discharges were observed only at the last stage. Presumably, the resistance of rubber to discharges is not the only factor that determines the time of loss of hydrophobicity. The very beginning of the process of loss of hydrophobicity should be investigated further.</p></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139107865","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 numerical study on applying ion concentration polarization in micropump design","authors":"Khai H. Nguyen,&nbsp;Dung T. Nguyen,&nbsp;Van-Sang Pham","doi":"10.1016/j.elstat.2023.103885","DOIUrl":"10.1016/j.elstat.2023.103885","url":null,"abstract":"<div><p><span>This work focuses on applying the phenomenon of ion concentration polarization to design and investigate a </span>micropump model that is a kind of electroosmotic micropump. Numerical study is conducted for ion concentration polarization in the manner that generates electro-osmosis flow and pumping effect. The formation of the extended space charge layer and the actions of the electric field upon this layer is applied to generate electro-osmosis flow to drive flow in the system. It is clarified that pumping effect can be enhanced by improving the geometry configurations. Multiple simulations are conducted to obtain an optimal micropump design.</p></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139092522","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 heat exchanger for construction of electrostatic precipitator in a small heat source","authors":"Michal Holubčík ,&nbsp;Juraj Trnka ,&nbsp;Nikola Čajová Kantová","doi":"10.1016/j.elstat.2023.103884","DOIUrl":"10.1016/j.elstat.2023.103884","url":null,"abstract":"<div><p>The article deals with the solution to the increased level of environmental pollution by emissions of solid particles from small sources. The research aimed to build an efficient electrostatic precipitator directly in the combustion device, ensuring simple maintenance and low space requirements. During the measurements on the experimental equipment, the average production of particulate matter was measured with and without the use of an electrostatic precipitator. Three combustion modes were used during the measurements: minimum, optimal and maximum performance. The results of the measurements showed up to 52.3 % efficiency in removing particles from flue gases.</p></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0304388623000931/pdfft?md5=6bc7f6ef806326c2ded6b98ded366818&pid=1-s2.0-S0304388623000931-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139066935","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":"Determining the streamer velocity in an atmospheric pressure plasma jet from the target substrate current","authors":"Michael J. Johnson,&nbsp;Carl Enloe,&nbsp;David R. Boris,&nbsp;Tzvetelina B. Petrova,&nbsp;Scott G. Walton","doi":"10.1016/j.elstat.2023.103883","DOIUrl":"https://doi.org/10.1016/j.elstat.2023.103883","url":null,"abstract":"<div><p>Plasma jets are an atmospheric pressure plasma source that projects streamers outside the bounds of the plasma device. The electric field produced by these streamers can generate a current in the substrate before the streamer contacts the substrate. This displacement current is a strong function of the proximity of the streamer to the surface. We develop a basic model of the streamer traveling towards the substrate that can determine the streamer location and velocity from the measured displacement current. This simple approach shows good agreement with optical imaging equipment and can provide a means to rapidly quantify the streamer velocity.</p></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S030438862300092X/pdfft?md5=f19cf9733c68031697df17155837976b&pid=1-s2.0-S030438862300092X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139050191","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":"Designing a new microchannel to collect microparticles using dielectrophoretic forces: Numerical and experimental investigation","authors":"M. Aghdasi ,&nbsp;M. Nazari ,&nbsp;S. Yonesi Holari ,&nbsp;Nicole N. Hashemi","doi":"10.1016/j.elstat.2023.103879","DOIUrl":"https://doi.org/10.1016/j.elstat.2023.103879","url":null,"abstract":"<div><p>Dielectrophoresis (DEP) is an effective technique for manipulating particles in microfluidic devices. The DEP force depends on the frequency and square gradient of the electric field, as well as the fluid and particle dielectric properties. An efficient system for manipulating particles can be designed by adjusting these factors. This study aims to develop an efficient microsystem for particle trapping using dual-frequency DEP force. The microfluidic system is divided into two parts of focusing and attracting. The negative DEP (nDEP) force in the focusing part concentrates particles near the microchannel axis. The positive DEP (pDEP) force in the attractive area then absorbs particles into the internal chamber via electrodes. In general, the main advantage of the present design is the maximum trapping of incoming particles (with a trapping rate of over 95%) regardless of their initial location. In this study, numerical modeling was first done in three dimensions to sort and trap the microparticles. Then, a microchip was designed, built, and tested in a laboratory to validate the results and confirm the microfluidic system behavior. Finally, a parametric study was conducted to figure out the best voltage range of the electric fields in the microfluidic system.</p></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0304388623000888/pdfft?md5=f14e744623bc3d351832956e4f180f34&pid=1-s2.0-S0304388623000888-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138739016","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":"Growth analysis of the particle layer in a small-scale ESP with biomass combustion","authors":"Natalia Cid,&nbsp;Sergio Chapela,&nbsp;Miguel Ángel Gómez,&nbsp;David Patiño","doi":"10.1016/j.elstat.2023.103881","DOIUrl":"https://doi.org/10.1016/j.elstat.2023.103881","url":null,"abstract":"<div><p>This study presents experimental results of the particle layer growth with the operation of a small-scale ESP as a flue gas cleaning method from domestic biomass combustion. The retention efficiency of the ESP is maintained above 90% for 40 h of operation, which is in agreement with its natural regeneration by partial collapses of the dust layer. The measurements of profile and thickness of the dust layer endorse the aforementioned collapses as discontinuous re-entrainment events that are also identified as abrupt peaks on the particle concentration at the outlet of the ESP and drops on the current values.</p></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0304388623000906/pdfft?md5=1c07d93272a2f464ac22a8f9eb38fd7b&pid=1-s2.0-S0304388623000906-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138633672","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":"Revisiting the effects of electrostatic forces on the lifting of sand particles in dust storms","authors":"Huan Zhang","doi":"10.1016/j.elstat.2023.103880","DOIUrl":"https://doi.org/10.1016/j.elstat.2023.103880","url":null,"abstract":"<div><p>We derived theoretical formulations for the fluid threshold of conducting and insulating sand particles under an imposed electric field. Our analysis reveals a non-monotonic dependency of the fluid threshold on particle diameter, imposed electric field, and surface charge density. For conducting particles, electrostatic forces lead to a reduction of the fluid threshold by up to 31%. In contrast, for negatively charged insulating particles, electrostatic forces enhance the fluid threshold by up to 76%. Unexpectedly, electrostatic forces either enhance or inhibit the fluid threshold by up to 30%, depending on the imposed electric field and surface charge density.</p></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S030438862300089X/pdfft?md5=9fda0d264e1d3419785bfcbd64977ce2&pid=1-s2.0-S030438862300089X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138549197","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":"Energy-saving discharge needle shape for electrohydrodynamic airflow generation","authors":"Donato Rubinetti ,&nbsp;Kamran Iranshahi ,&nbsp;Daniel I. Onwude ,&nbsp;Bart M. Nicolaï ,&nbsp;Lei Xie ,&nbsp;Thijs Defraeye","doi":"10.1016/j.elstat.2023.103876","DOIUrl":"https://doi.org/10.1016/j.elstat.2023.103876","url":null,"abstract":"<div><p>Electrohydrodynamics (EHD) is a way to produce low energy-consuming airflow without moving components. The basis of airflow by EHD is corona discharge. A way to generate corona discharge is done, among others, via needle-type emitter electrodes whose shape and arrangement play a crucial role in the effectiveness of the discharge. Until now, the needle shape was chosen somewhat arbitrarily, although it impacts the energy consumption of the EHD process. We lack systematic studies on the impact of needle shape on the EHD discharge process and associated airflow to help engineers and scientists choose the best shape. This in-silico study screens the impact of the needle shape parameters on EHD performance in terms of electrical power consumption and airflow generation. The study aims to find the ideal EHD needle shape for unrestricted and confined flow. For this purpose, we test three different geometrical configurations. The first configuration is a free-flow single-needle configuration. The second configuration adds a dielectric nearby, which represents a needle enclosure. Lastly, a configuration including a dielectric and a converging nozzle is examined. All studies use a 2D-axisymmetric, fully automatized EHD physics-based model. The first set of parametric studies explores the inherent geometrical properties of the needle shape, like tip radii (10–250 <span><math><mrow><mi>μ</mi><mi>m</mi></mrow></math></span>), needle cone angle (10–70°), and needle diameters (0.5–2 mm). The second set of parametric studies investigates the operation conditions, such as the emitter-collector distance (10–40 mm), the nozzle contraction ratio (0.04–1), and the operating voltage (6–32 kV). The results of the free-flow configuration show qualitative agreement with experiments on existing needle products. The ideal energy-saving needle shape for free flow configuration features a short conical tip length (i.e., a large angle <span><math><mrow><mo>≥</mo><mrow><mn>30</mn><mo>°</mo></mrow></mrow></math></span>), a diameter of 2 mm, and a needle rip radius of 100 <span><math><mrow><mi>μ</mi><mi>m</mi></mrow></math></span>. The situation changes when a dielectric is present, and a sharp angle of 10° is favorable to reduce energy consumption. Since a dielectric inverts the optimal needle shape, it makes sense to customize it for a particular application in EHD airflow generation. We provide performance maps that can be used as design charts. This study is a guideline to optimize EHD devices further to reduce energy consumption and increase airflow speed.</p></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0304388623000852/pdfft?md5=0cbe80408ebea3e0b9143ceb5af0716c&pid=1-s2.0-S0304388623000852-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138501235","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":"Study on atomization of grounding electrodes under the influence of magnetic field for dedusting and desulfurization of negative corona discharge","authors":"Yuhua Guan ,&nbsp;Wei Chen ,&nbsp;Junfeng Mi ,&nbsp;Shengnan Du","doi":"10.1016/j.elstat.2023.103868","DOIUrl":"https://doi.org/10.1016/j.elstat.2023.103868","url":null,"abstract":"<div><p>Corona discharge low-temperature plasma technology has good performance in treating dust and removing gaseous pollutants. In this paper, the dust and SO₂ in the flue gas are removed by using the ground electrode atomization negative corona discharge device under the action of a magnetic field, and the discharge characteristics of the device, the removal efficiency of dust and sulfur dioxide, and its influencing factors are studied. The results show that the discharge characteristics and dust removal and desulfurization efficiency of the ground electrode atomization negative corona discharge under the action of a magnetic field are superior to the traditional l corona discharge and are almost affected by the extension of the operating time. Finally, the ground electrode atomization negative corona discharge under the action of a magnetic field is analyzed. The dust removal and desulfurization mechanism of corona discharge provide a reference for the development of dust removal and integrated desulfurization equipment.</p></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0304388623000773/pdfft?md5=241c28b77ea4bf9b49672ea0c9a7fb51&pid=1-s2.0-S0304388623000773-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138484487","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}