Relevant bibliographies by topics / Electrostatics and electrodynamics

Academic literature on the topic 'Electrostatics and electrodynamics'

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Published: 4 June 2021
Last updated: 31 January 2023

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Journal articles on the topic "Electrostatics and electrodynamics"

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Moayedi, S. K., M. Shafabakhsh, and F. Fathi. "Analytical Calculation of Stored Electrostatic Energy per Unit Length for an Infinite Charged Line and an Infinitely Long Cylinder in the Framework of Born-Infeld Electrostatics." Advances in High Energy Physics 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/180185.

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More than 80 years ago, Born-Infeld electrodynamics was proposed in order to remove the point charge singularity in Maxwell electrodynamics. In this work, after a brief introduction to Lagrangian formulation of Abelian Born-Infeld model in the presence of an external source, we obtain the explicit forms of Gauss’s law and the energy density of an electrostatic field for Born-Infeld electrostatics. The electric field and the stored electrostatic energy per unit length for an infinite charged line and an infinitely long cylinder in Born-Infeld electrostatics are calculated. Numerical estimations in this paper show that the nonlinear corrections to Maxwell electrodynamics are considerable only for strong electric fields. We present an action functional for Abelian Born-Infeld model with an auxiliary scalar field in the presence of an external source. This action functional is a generalization of the action functional which was presented by Tseytlin in his studies on low energy dynamics ofD-branes (Nucl. Phys. B469, 51 (1996); Int. J. Mod. Phys. A 19, 3427 (2004)). Finally, we derive the symmetric energy-momentum tensor for Abelian Born-Infeld model with an auxiliary scalar field.
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Land, Martin. "Electrostatics in Stueckelberg-Horwitz electrodynamics." Journal of Physics: Conference Series 437 (April 22, 2013): 012012. http://dx.doi.org/10.1088/1742-6596/437/1/012012.

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Porschke, D. "Electrostatics and electrodynamics of bacteriorhodopsin." Biophysical Journal 71, no. 6 (December 1996): 3381–91. http://dx.doi.org/10.1016/s0006-3495(96)79531-0.

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Sales, Jorge Henrique de Oliveira. "Podolsky's Electrodynamics Via First Principles." Journal of Engineering and Exact Sciences 8, no. 2 (February 25, 2022): 13818–01. http://dx.doi.org/10.18540/jcecvl8iss2pp13818-01e.

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A theory of electromagnetism with higher order derivatives, which attained by generalizing the laws of electrostatics, laws that follow from the generalized Coulomb's law and the superposition principle, so that they are consistent with special relativity.
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Scharf, Günter, and Richard A. Matzner. "From Electrostatics to Optics: A Concise Electrodynamics Course." American Journal of Physics 63, no. 10 (October 1995): 959–60. http://dx.doi.org/10.1119/1.18043.

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Bhattacharyya, Ie Mei, Izhar Ron, Ankit Chauhan, Evgeny Pikhay, Doron Greental, Niv Mizrahi, Yakov Roizin, and Gil Shalev. "A new approach towards the Debye length challenge for specific and label-free biological sensing based on field-effect transistors." Nanoscale 14, no. 7 (2022): 2837–47. http://dx.doi.org/10.1039/d1nr08468b.

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A Meta-Nano Channel BioFET is demonstrated to decouple the electrostatics of the solution from the electrodynamics of the FET such that the Debye screening length can be electrostatically tuned to enhance the sensor output signal.
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Eylon, Bat‐Sheva, and Uri Ganiel‡. "Macro‐micro relationships: the missing link between electrostatics and electrodynamics in students’ reasoning." International Journal of Science Education 12, no. 1 (January 1990): 79–94. http://dx.doi.org/10.1080/0950069900120107.

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AN, Jeonggon, and Gyoungho LEE*. "Analysis of Students' Difficulties in Learning Electrodynamics via a Model-based View: A Focus on Electrostatics." New Physics: Sae Mulli 66, no. 5 (May 31, 2016): 590–99. http://dx.doi.org/10.3938/npsm.66.590.

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Onohara, A. N., I. S. Batista, and H. Takahashi. "The ultra-fast Kelvin waves in the equatorial ionosphere: observations and modeling." Annales Geophysicae 31, no. 2 (February 7, 2013): 209–15. http://dx.doi.org/10.5194/angeo-31-209-2013.

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Abstract. The main purpose of this study is to investigate the vertical coupling between the mesosphere and lower thermosphere (MLT) region and the ionosphere through ultra-fast Kelvin (UFK) waves in the equatorial atmosphere. The effect of UFK waves on the ionospheric parameters was estimated using an ionospheric model which calculates electrostatic potential in the E-region and solves coupled electrodynamics of the equatorial ionosphere in the E- and F-regions. The UFK wave was observed in the South American equatorial region during February–March 2005. The MLT wind data obtained by meteor radar at São João do Cariri (7.5° S, 37.5° W) and ionospheric F-layer bottom height (h'F) observed by ionosonde at Fortaleza (3.9° S; 38.4° W) were used in order to calculate the wave characteristics and amplitude of oscillation. The simulation results showed that the combined electrodynamical effect of tides and UFK waves in the MLT region could explain the oscillations observed in the ionospheric parameters.
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Kruglov, S. I. "Remarks on Heisenberg–Euler-type electrodynamics." Modern Physics Letters A 32, no. 16 (May 11, 2017): 1750092. http://dx.doi.org/10.1142/s0217732317500924.

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We consider Heisenberg–Euler-type model of nonlinear electrodynamics with two parameters. Heisenberg–Euler electrodynamics is a particular case of this model. Corrections to Coulomb’s law at [Formula: see text] are obtained and energy conditions are studied. The total electrostatic energy of charged particles is finite. The charged black hole solution in the framework of nonlinear electrodynamics is investigated. We find the asymptotic of the metric and mass functions at [Formula: see text]. Corrections to the Reissner–Nordström solution are obtained.
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Dissertations / Theses on the topic "Electrostatics and electrodynamics"

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Dai, Jianhua. "Simulation of Multiobject Nanoscale Systems." University of Akron / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=akron1239154185.

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Merlin, Jenny. "Propriétés électrostatiques, mécaniques et chémodynamiques de (bio)interphases molles : analyses en régime d'équilibre et transitoire." Thesis, Université de Lorraine, 2012. http://www.theses.fr/2012LORR0295/document.

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Dans les milieux naturels, la matière solide est essentiellement présente sous la forme de (bio)particules molles perméables aux ions et aux flux hydriques. Ces particules sont sans cesse soumises à des perturbations électriques/mécaniques, de telle sorte que les propriétés physico-chimiques des (bio)interphases qu'elles forment avec le milieu évoluent continûment dans le temps. Les (bio)interphases ne sont donc pas nécessairement à l'équilibre durant les processus interfaciaux (interactions électrostatiques, complexation de métaux). Dans ce contexte, nous avons évalué théoriquement l'énergie d'interaction électrostatique à l'équilibre entre (bio)particules molles multicouches de tailles et de densités de charge arbitraires. Puis nous avons déterminé l'impact de la dynamique hors-équilibre des propriétés électriques de (bio)films mous ligands sur leur capacité à former des complexes avec des métaux. Le dernier modèle théorique élaboré a pour objectif l'analyse de la dynamique de (bio)interphases multicouches hétérogènes en régimes d'équilibre et hors-équilibre. Enfin nous avons analysé à l'équilibre, en alliant l'AFM et l'électrophorèse, les propriétés mécaniques et électriques de bactéries E. coli exprimant spécifiquement (ou non) des structures de surface différentes. Toutes ces études ont montré la nécessité de prendre en compte pour l'analyse de la réactivité de (bio)particules dans leur milieu environnant (i) une représentation fidèle des (bio)particules (mollesse mécanique et hydrodynamique, hétérogénéité spatiale de la structure molle) et (ii) l'impact de la dynamique spatio-temporelle des (bio)interphases sur les processus gouvernant leur réactivité
In natural media, the solid matter is mainly present as soft (bio)particles (bacteria, viruses, humic acids) which are permeable toward ions and hydric fluxes. These (bio)particles are unceasingly exposed to electrical/mechanical perturbations, so that the physicochemical properties of (bio)interphases, developed by (bio)particles with the medium, evolve continuously. (Bio)interphases are thus not necessarily at equilibrium during interfacial processes e.g. electrostatic interactions, complexation with metallic contaminants. Under such a context, we evaluated theoretically at equilibrium the electrostatic interaction energy between soft multilayered (bio)particles with arbitrary sizes and charge densities. We then determined the impact of non- equilibrium electric properties of soft ligand polymeric (bio)films on their ability to form complexes with metals. The aim of the last theoretical model developed here is to analyze the dynamics of multilayered heterogeneous (bio)interphases in both equilibrium and non-equilibrium regimes. Finally we analyzed at equilibrium, by coupling AFM and microelectrophoresis measurements, mechanical and electrical properties of bacterial strains Escherichia coli that specifically express (or not) different surface structures (pili, fimbriae, adhesin Ag43). All these studies highlighted the necessity to integrate for the analysis of (bio)particles reactivity with their surrounding medium (i) a close representation of soft (bio)particles (mechanical and hydrodynamic softness, spatial heterogeneity of the soft material) and (ii) the impact of spatiotemporal dynamics of (bio)interphases on the processes governing their reactivity
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Preto, Jordane. "Long-range interactions in biological systems." Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4053.

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L'auto-organisation des organismes vivants est d'une complexité et d'une efficacité étonnantes. Plus précisément, les systèmes biologiques abritent un nombre gigantesque de réactions très spécifiques qui nécessitent que la bonne biomolécule se retrouve à la bonne place, dans le bon ordre et en un temps suffisamment court pour permettre le fonctionnement cellulaire, et au-delà la vie cellulaire. D'un point de vue dynamique, cela pose la question fondamentale de savoir comment les biomolécules trouvent efficacement leur(s) cible(s) spécifique(s), ou encore, quels types de forces rassemblent tous ces partenaires de réaction spécifiques dans un environnement aussi dense et ionisé que les micro-environnements cellulaires. Dans cette thèse, nous explorons la possibilité que des biomolécules puissent interagir à travers des interactions électromagnétiques de longue-portée telles que ces dernières sont prédites à partir des premiers principes de la physique; ''longue-portée'' signifiant que les interactionsen question sont actives sur des distances bien plus larges que les dimensions typiques des molécules mises en jeu (i.e., plus grandes qu'environ 50 angströms dans les systèmes biologiques). Après avoir posé les fondements théoriques concernant les interactionsde longue-portée potentiellement actives sur de longue distances dans un contexte biologique, nous étudions la posssibilité de détecter leur éventuelle contribution à partir de dispositifs expérimentaux qui sont accessibles de nos jours. Sur ce dernier point, des résultats préliminaires encourageants tant sur le plan théorique qu'expérimental sont présentés
Self-organization of living organisms is of an astonishing complexity and efficiency. More specifically, biological systems are the site of a huge number of very specific reactions thatrequire the right biomolecule to be at the right place, in the right order and in a reasonably short time to sustain cellular function and ultimately cellular life. From the dynamic point of view, this raises the fundamental question of how biomolecules effectively find their target(s); in other words, what kinds of forces bring all these specific cognate partners together in an environment as dense and ionized as cellular micro-environments. In the present thesis, we explore the possibility that biomolecules interact through long-range electromagnetic interactions as they are predicted from the first principles of physics; "long-range" meaning that the mentioned interactions are effective over distances much larger than the typical dimensions of the molecules involved (i.e., larger than about 50 angströms in biological systems).After laying the theoretical foundations about interactions that are potentially active over long distances in a biological context, we investigate the possibility of detecting their contribution from experimental devices which are nowadays available. On the latter point, encouraging preliminary results both at the theoretical and experimental levels are exposed
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(9181778), Nancy D. Isner. "COMPUTATIONAL STUDY OF EFFECT OF NANOSECOND ELECTRIC PULSE PARAMETERS ON PLASMA SPECIES GENERATION." Thesis, 2020.

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Multiple industry applications, including combustion, flow control, and medicine, have leveraged nanosecond pulsed plasma (NPP) discharges to create plasma generated reactive species (PGRS). The PGRS are essential to induce plasma-assisted mechanisms, but the rate of generation and permanence of these species remains complex. Many of the mechanisms surrounding plasma discharge have been discovered through experiments, but a consistent challenge of time scales limits the plasma measurements. Thus, a well-constructed model with experimental research will help elucidate complex plasma physics. The motivation of this work is to construct a feasible physical model within the additional numerical times scale limitations and computational resources. This thesis summarizes the development of a one-moment fluid model for NPP discharges, which are applied due to their efficacy in generating ionized and excited species from vacuum to atmospheric pressure.

From a pulsed power perspective, the influence of pulse parameters, such as electric field intensity, pulse shape and repetition rate, are critical; however, the effects of these parameters on PGRS remain incompletely characterized. Here, we assess the influence of pulse conditions on the electric field and PGRS computationally by coupling a quasi-one-dimensional model for a parallel plate geometry, with a Boltzmann solver (BOLSIG+) used to improve plasma species characterization. We first consider a low-pressure gas discharge (3 Torr) using a five-species model for argon. We then extend to a 23 species model with a reduced set of reactions for air chemistry remaining at low pressure. The foundations of a single NPP is first discussed to build upon the analysis of repeating pulses. Because many applications use multiple electric pulses (EPs) the need to examine EP parameters is necessary to optimize ionization and PGRS formation.

The major goal of this study is to understand how the delivered EP parameters scale with the generated species in the plasma. Beginning with a similar scaling study done by Paschen we examine the effects of scaling pressure and gap length when the product remains constant for the two models. This then leads to our study on the relationship of pulsed power for different voltages and pulse widths of EPs. By fixing the energy delivered to the gap for a single pulse we determine that the electron and ion number densities both increased with decreasing pulse duration; however, the rate of this increase of number densities appeared to reach a limit for 3 ns. These results suggest the feasibly of achieving comparable outputs using less expensive pulse generators with higher pulse duration and lower peak voltage. Lastly, we study these outcomes when increasing the number of pulses and discuss the effects of pulse repetition and the electron temperature.

Future work will extend this parametric study to different geometries (i.e. pin-to-plate, and pin-to pin) and ultimately incorporate this model into a high-fidelity computational fluid dynamics (CFD) model that may be compared to spectroscopic results under quiescent and flowing conditions will be discussed.

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Li, Jun. "Influence of alkali metal ion on gibbsite crystallization from synthetic bayer liquors." 2000. http://arrow.unisa.edu.au:8081/1959.8/46669.

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The Bayer process for the production of alumina (A1203) from bauxite involves a perennial gibbsite (y-Al(OH)3) precipitation step, relating to an inherently slow crystal growth from supersaturated sodium aluminate solutions (pregnant Bayer liquors). The kinetics and mechanisms involved in the transformation of the tetrahydroxo, Al(III)-containing species in solution into octahedrally-coordinated Al(OH)3 crystals in the presence of NA+ and excess of ions, are as yet not fully known. To gain further knowledge and better understanding of the nature of solution species, their specific interaction and participation in the gibbsite crystallization mechanisms, the role alkali ions play in the kinetic behaviour and mechanisms of nucleation, growth and aggregation/agglomeration from caustic aluminate solutions of industrial strength has been investigated.
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Morales, Cristian. "Modeling the particle transport of electrodynamic screens to optimize dust removal from solar energy collectors." Thesis, 2021. https://hdl.handle.net/2144/41940.

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Solar energy installations located in dry, arid regions chosen for their availability of sunlight often face the problem of dust accumulation, or "soiling", on their solar collector surfaces, requiring this dust to be cleaned regularly in order to maintain optimal power production. The electrodynamic screen (EDS) is a technology that can clean this dust off the surfaces of photovoltaic panels and concentrating solar power mirrors using no water and a minimum of power. The EDS is a series of conductive electrodes embedded between two thin dielectric layers, where voltages applied across the electrodes create a patterned electric field which directs the motion of charged dust particles off the EDS surface. As the dust in different desert regions across the world have different physical characteristics, a different set of design parameters is required for the optimal EDS for each region. This optimization work could be easily conducted using a computer model of the physics of an EDS and the dust it clears off its surface. In this thesis, a computer model of the EDS system is created using COMSOL Multiphysics. This model simulates the voltages applied across the electrodes and the resulting electric fields, and then use these to simulate the trajectories of the charged dust particles as they move across the EDS surface. This particle tracing work is validated using experimental data from high-speed camera trials and performance data for different EDS designs. This validation work shows both agreements and disagreements between the predicted and observed dust particle motion, and the beginnings of the investigation into this difference is presented. Finally, the ability to further develop this model for EDS design optimization is discussed.
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Kolluru, Sethu Hareesh. "Preliminary Investigations of a Stochastic Method to solve Electrostatic and Electrodynamic Problems." 2008. https://scholarworks.umass.edu/theses/191.

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A stochastic method is developed, implemented and investigated here for solving Laplace, Poisson's, and standard parabolic wave equations. This method is based on the properties of random walk, diffusion process, Ito formula, Dynkin formula and Monte Carlo simulations. The developed method is a local method i:e: it gives the value of the solution directly at an arbitrary point rather than extracting its value from complete field solution and thus is inherently parallel. Field computation by this method is demonstrated for electrostatic and electrodynamic propagation problems by considering simple examples and numerical results are presented to validate this method. Numerical investigations are carried out to understand efficacy and limitations of this method and to provide qualitative understanding of various parameters involved in this method.
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Sayyah, Arash. "Mitigation of soiling losses in solar collectors: removal of surface-adhered dust particles using an electrodynamic screen." Thesis, 2015. https://hdl.handle.net/2144/13643.

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Particulate contamination of the optical surfaces of solar collectors, often called "soiling", can have a significant deteriorating impact on energy yield due to the absorption and scattering of incident light. Soiling has more destructive effect on concentrated solar systems than on flat-plate photovoltaic panels, as the former are incapable of converting scattered sunlight. The first part of this thesis deals with the soiling losses of flat-plate photovoltaic (PV), concentrated solar power (CSP), and concentrated photovoltaic (CPV) systems in operation in several regions of the world. Influential parameters in dust accumulation losses, as well as different cleaning mechanisms in pursuit of restoring the efficiency of soiled systems, have been thoroughly investigated. In lieu of the most commonly-practiced manual cleaning method of using high-pressure water jets, the concept of automatic dust removal using the electrostatic forces of electrodynamic screen (EDS) technology is in a developmental stage and on its way toward commercialization. This thesis provides comprehensive analytical solutions for the electric potential and electric field distribution in EDS devices having different configurations. Numerical simulations developed using finite element analysis (FEA) software have corroborated the analytical solutions which can easily be embedded into software programs for particle trajectory simulations while also providing flexibility and generality in the study on the effect of different parameters of the EDS on the electric field and ensuing dust-removal performance. Evaluation and comparison of different repelling and attracting forces exerted on dust particles is of utmost importance to a detailed analysis of EDS performance in dust removal. Hence, the balance of electrostatic and adhesion forces, including van der Waals and capillary forces, have received significant attention in this dissertation. Furthermore, different numerical analyses have been conducted to investigate the potential causes of observed failures of EDS prototypes that functioned well in a laboratory environment but failed after outdoor exposure. Experimental studies form the last two chapters of this dissertation. Different tests have been conducted on an EDS sample integrated with a PV cell to restore the efficiency of the cell after dust deposition. In order to evaluate the performance of the EDS in dust-particle removal, we have studied the particle size distribution on the EDS surface after each dust deposition and EDS cleaning cycle using a custom-built dust-deposition analyzer. Furthermore, we have pursued several experiments to examine how the geometric and operational EDS parameters affect particle charge via charge-to-mass-ratio measurements.
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Alhasan, Ammar. "Comparison Of Casimir , Elastic, Electrostatic Forces For A Micro-Cantilever." Master's thesis, 2014. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/6049.

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Casimir force is a cause of stiction (adhesion) between metal surfaces in Micro-Electro Mechanical Systems (MEMS). Casimir Force depends strongly on the separation of the two surfaces and the contact area. This thesis reviews the theory and prior experimental demonstrations of the Casimir force. Then the Casimir attractive force is calculated for a particular MEMS cantilever device, in which the metal cantilever tip is required to repeatedly touch and release from a metal tip pad on the substrate surface in response to a periodic driving electrostatic force. The elastic force due to the bending of the cantilever support arms is also a consideration in the device operation. The three forces are calculated analytically and compared as a function of cantilever tip height. Calculation of the electrostatic force uses coefficients of capacitance and electrostatic induction determined numerically by the finite element method, including the effect of permittivity for the structural oxide. A condition on the tip area to allow electrostatic release of the tip from the surface against Casimir sticking and elastic restoring forces is established.
M.S.
Masters
Physics
Sciences
Physics
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Books on the topic "Electrostatics and electrodynamics"

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Scharf, G. From electrostatics to optics: A concise electrodynamics course. Berlin: Springer-Verlag, 1994.

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Dvizhenie tverdogo tela v ėlektricheskikh i magnitnykh poli͡akh. Moskva: "Nauka," Glav. red. fiziko-matematicheskoĭ lit-ry, 1988.

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Smythe, William B. Static and Dynamic Electricity. 3rd ed. Hemisphere Pub, 1989.

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Smythe, William. Static And Dynamic Electricity (Summa Book). Taylor & Francis, 1989.

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Scharf, G. From Electrostatics to Optics: A Concise Electrodynamics Course. Springer London, Limited, 2012.

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Prytz, Kjell. Electrodynamics : The Field-Free Approach: Electrostatics, Magnetism, Induction, Relativity and Field Theory. Springer, 2015.

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Prytz, Kjell. Electrodynamics : the Field-Free Approach: Electrostatics, Magnetism, Induction, Relativity and Field Theory. Springer London, Limited, 2015.

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Prytz, Kjell. Electrodynamics : The Field-Free Approach: Electrostatics, Magnetism, Induction, Relativity and Field Theory. Springer, 2016.

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Book chapters on the topic "Electrostatics and electrodynamics"

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Lacava, Francesco. "Conformal Mapping in Electrostatics." In Classical Electrodynamics, 117–36. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-05099-2_7.

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Scharf, Günter. "Electrodynamics in Vacuum." In From Electrostatics to Optics, 82–149. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-85087-5_4.

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Scharf, Günter. "Epilogue: Quantum Electrodynamics." In From Electrostatics to Optics, 240–46. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-85087-5_7.

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Lacava, Francesco. "Functions of Complex Variables and Electrostatics." In Classical Electrodynamics, 73–86. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-39474-9_5.

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Lacava, Francesco. "Functions of Complex Variables and Electrostatics." In Classical Electrodynamics, 101–15. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-05099-2_6.

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Scharf, Günter. "Phenomenological Electrodynamics in Simple Matter." In From Electrostatics to Optics, 150–87. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-85087-5_5.

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Land, Martin, and Lawrence P. Horwitz. "Problems in Electrostatics and Electrodynamics." In Relativistic Classical Mechanics and Electrodynamics, 47–96. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-031-02079-7_4.

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Bhattacharya, Kaushik, and Soumik Mukhopadhyay. "Boundary Value Problems in Electrostatics." In Introduction to Advanced Electrodynamics, 35–70. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-7802-8_2.

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van Leeuwen, H. P., and J. Lyklema. "Interfacial Electrostatics and Electrodynamics in Disperse Systems." In Modern Aspects of Electrochemistry, 411–83. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4613-2133-0_6.

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Fridman, Alexander, and Lawrence A. Kennedy. "Electrostatics, Electrodynamics and Fluid Mechanics of Plasma." In Plasma Physics and Engineering, 267–354. 3rd ed. Third edition. | Boca Raton : CRC Press, 2021.: CRC Press, 2021. http://dx.doi.org/10.1201/9781315120812-7.

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Conference papers on the topic "Electrostatics and electrodynamics"

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Ganiel, Uri. "Electrostatics and electrodynamics-A case of micro Versus Macro." In AIP Conference Proceedings Volume 173. AIP, 1988. http://dx.doi.org/10.1063/1.37566.

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Tripathi, Smriti, Majura Selekwa, and Andrew Naversen. "Optimal Positioning Control of IPMC Actuators." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-38663.

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There has been a growing interest in electroactive polymers (EAP) because of their ability to serve as artificial muscles for both macro and micro positioning tasks. Ionic Polymer Metal Composites (IPMC) are among the EAP materials that have been extensively studied in the last few years. Along with development of better manufacturing methods and increasing understanding of their mechanical properties, extensive studies have been geared towards controlling the actuation of these actuators. Despite many efforts, the one problem that has not been fully addressed is on electromechanical modeling and control of these actuators. This paper presents additional details on the model that was earlier proposed by the authors for positioning such actuators. Experimental data on Nafion IPMC specimens of various sizes indicated that the specimen has both resistive and capacitive properties that vary with time. By using this experimental data, electrodynamics and electrostatics principles were used in developing an electromechanical model that was experimentally validated on Nafion IPMC specimens of various sizes again. The resulting model was found to be nonlinear time varying that can be linearized and controlled by standard linear optimal control algorithms.
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Ranasinghe, Damith C., and Peter H. Cole. "A relation between electrostatic and electrodynamic theory." In 2007 IEEE Antennas and Propagation International Symposium. IEEE, 2007. http://dx.doi.org/10.1109/aps.2007.4396422.

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Doi, Kentaro, and Satoyuki Kawano. "Theoretical Development of Predicted Iteration Method for Considering Electron Dynamics in Quantum Molecular Dynamics." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-36033.

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In the present study, a theoretical principle of molecular dynamics methods is developed, in which electron transfers are taken into account effectively based on quantum mechanics. In chemical reaction systems, electrodynamics should be considered in the molecular dynamics simulation because electron transfers play an important role. In this study, an effective procedure is proposed to treat time evolutions of electronic wavefunctions. In the procedure, electronic wavefunctions can be transformed to other spaces such as Mulliken atomic charges or electrostatic potentials, and then their time evolutions are coupled with the motions of ionic cores. The present method is applied to some chemical reaction systems, and charge transfer effects can be treated successfully in molecular dynamics simulations. The importance of a coupling method of molecular dynamics and electrodynamics is described.
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Ruzziconi, Laura, Mohammad I. Younis, and Stefano Lenci. "Nonlinear Dynamics of a NEMS Carbon Nanotube Resonator." In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-70507.

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In this study we consider a slacked CNT and analyze the nonlinear response under electrostatic and electrodynamic actuation. We introduce a reduced-order model, which takes into account the single-mode dynamics and is derived via the Ritz method and the Padé approximation. The overall scenario of the device behavior is investigated when both the frequency and the electrodynamic voltage are varying. Extensive numerical simulations are performed by the combined use of frequency response diagrams, attractor-basins phase portraits, and frequency-dynamic voltage behavior chart. Our aim is that of illustrating the richness of the nonlinear events that may undergo in the device due to the coupling of mechanical and electrical nonlinearities. We observe that the CNT exhibits coexisting competing attractors, which lead to a versatile behavior. We examine the multistability in detail. The response is explored not only at low electrodynamic voltages, where the safe jump between attractors is ensured, but also at large electrodynamic excitation, where the inevitable escape (dynamic pull-in) becomes impending. We detect the theoretical boundaries of appearance and disappearance of the main attractors, which provide a complete description of the response.
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Stindl, Torsten, Markus Fertig, and Monika Auweter-Kurtz. "Investigation of Coupled Electrodynamic Tether / Electrostatic Propulsion Systems Using a Particle Approach." In 42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2006. http://dx.doi.org/10.2514/6.2006-4651.

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Ruzziconi, Laura, Ahmad M. Bataineh, Mohammad I. Younis, Weili Cui, and Stefano Lenci. "Nonlinear Dynamic Response of an Electrically Actuated Imperfect Microbeam Resonator." In ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/detc2013-12240.

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We present a study of the dynamic behavior of a MEMS device constituted of an imperfect clamped-clamped microbeam subjected to electrostatic and electrodynamic actuation. Our objective is to develop a theoretical analysis, which is able to describe and predict all the main relevant aspects of the experimental response. Extensive experimental investigation is conducted, where the main imperfections coming from microfabrication are detected and the nonlinear dynamics are explored at increasing values of electrodynamic excitation, in a neighborhood of the first symmetric resonance. The nonlinear behavior is highlighted, which includes ranges of multistability, where the non-resonant and the resonant branch coexist, and intervals where superharmonic resonances are clearly visible. Numerical simulations are performed. Initially, two single mode reduced-order models are considered. One is generated via the Galerkin technique, and the other one via the combined use of the Ritz method and the Padé approximation. Both of them are able to provide a satisfactory agreement with the experimental data. This occurs not only at low values of electrodynamic excitation, but also at higher ones. Their computational efficiency is discussed in detail, since this is an essential aspect for systematic local and global simulations. Finally, the theoretical analysis is further improved and a two-degree-of-freedom reduced-order model is developed, which is capable also to capture the measured second symmetric superharmonic resonance. Despite the apparent simplicity, it is shown that all the proposed reduced-order models are able to describe the experimental complex nonlinear dynamics of the device accurately and properly, which validates the proposed theoretical approach.
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Al Teneiji, Shamma Saleh, and Sherooq Saleh Al Teneiji. "Electrostatic Dust Removal for Solar Panels." In ADIPEC. SPE, 2022. http://dx.doi.org/10.2118/210820-ms.

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Abstract The world is evolving and developing in various sectors to enhance life which in return is increasing the energy requirements. The development of sustainable energy sources has increased over the years in order to preserve the fossil fuel energy resources such as coal, oil, natural gas, wood etc. which will reduce greenhouse gas emissions and accordingly protect the environment. As the world moves toward sustainable solutions of clean energy resources for a more environmentally friendly life, the utilization of solar energy has increased. Subsequently, Photovoltaics (PV) panels usage increased tremendously in the recent years. the high efficiency of the PVs is highly impacted by the dust build up causing a big decrease of output power in power output which could reach up to 50% power loss with dust accumulation of 5 mg/cm2 as it be discussed later in paper. The objective of this paper is to present one of the proposed solutions for cleaning the solar panels and as a result enhance the absorption of solar power and the efficiency of the PV panels. The solution is a waterless approach for dust removal from solar panels using electrostatic induction. This is a new technology which is experimentally tested. The new technology is a development to Electrodynamic Screens (EDS) technology where particles are electrically conducted actively charged like conductive iron particles where particle lift-off happens when the applied voltage reaches a threshold value that enables particles to overcome the force that adhere them on the surface. Implementing this technology shall provide a sustainable solution that can be implemented anywhere specially areas where it is difficult to transport water or visit regularly for cleaning. The technology is still in experimental stages not established or implemented in any existing system. Results are based on theoretical calculation, experimental lab prototype, and conclusions.
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Barz, Dominik P. J., and Peter Ehrhard. "Fully-Coupled Modelling of Electrokinetic Flow and Migration of Electrolytes in Microfluidic Devices." In ASME 2007 5th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2007. http://dx.doi.org/10.1115/icnmm2007-30117.

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We investigate the electrokinetic flow and mass transport in a microchannel junction, serving as an injector of a microelectrophoresis device. In order to consider all essential features of this complex system, the electrical situation, the fluid dynamics, and the (physical) chemistry is taken into account. The electrical situation is modeled by a combination of an electrostatic and an electrodynamic approach. The fluid dynamics can be described by the Navier-Stokes equations, extended by an additional force term. The chemistry of the system is represented by source terms in the mass transport equations. Moreover, the interaction between the buffer concentration and the physicochemical properties of the channel wall is taken into consideration by an empirical approach. All equations are encoded in a dimensionless form so that dimensionless groups control the problem. Approximative analytical solutions for the phenomena within the electrical double layer can be found and, thus, we can reduce the numerical costs due to an asymptotic matching procedure. The models are implemented in a Finite Element Method (FEM) code and time-dependent, two-dimensional simulations are performed. The results of the simulations show the strong coupling between the involved physicochemical processes.
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Reports on the topic "Electrostatics and electrodynamics"

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Law, Edward, Samuel Gan-Mor, Hazel Wetzstein, and Dan Eisikowitch. Electrostatic Processes Underlying Natural and Mechanized Transfer of Pollen. United States Department of Agriculture, May 1998. http://dx.doi.org/10.32747/1998.7613035.bard.

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The project objective was to more fully understand how the motion of pollen grains may be controlled by electrostatic forces, and to develop a reliable mechanized pollination system based upon sound electrostatic and aerodynamic principles. Theoretical and experimental analyses and computer simulation methods which investigated electrostatic aspects of natural pollen transfer by insects found that: a) actively flying honeybees accumulate ~ 23 pC average charge (93 pC max.) which elevates their bodies to ~ 47 V likely by triboelectrification, inducing ~ 10 fC of opposite charge onto nearby pollen grains, and overcoming their typically 0.3-3.9 nN detachment force resulting in non-contact electrostatic pollen transfer across a 5 mm or greater air gap from anther-to-bee, thus providing a theoretical basis for earlier experimental observations and "buzz pollination" events; b) charge-relaxation characteristics measured for flower structural components (viz., 3 ns and 25 ns time constants, respectively, for the stigma-style vs. waxy petal surfaces) ensure them to be electrically appropriate targets for electrodeposition of charged pollen grains but not differing sufficiently to facilitate electrodynamic focusing onto the stigma; c) conventional electrostatic focusing beneficially concentrates pollen-deposition electric fields onto the pistill tip by 3-fold as compared to that onto underlying flower structures; and d) pollen viability is adequately maintained following exposure to particulate charging/management fields exceeding 2 MV/m. Laboratory- and field-scale processes/prototype machines for electrostatic application of pollen were successfully developed to dispense pollen in both a dry-powder phase and in a liquid-carried phase utilizing corona, triboelectric, and induction particulate-charging methods; pollen-charge levels attained (~ 1-10 mC/kg) provide pollen-deposition forces 10-, 77-, and 100-fold greater than gravity, respectively, for such charged pollen grains subjected to a 1 kV/cm electric field. Lab and field evaluations have documented charged vs. ukncharged pollen deposition to be significantly (a = 0.01-0.05) increased by 3.9-5.6 times. Orchard trials showed initial fruit set on branches individually treated with electrostatically applied pollen to typically increase up to ~ 2-fold vs. uncharged pollen applications; however, whole-tree applications have not significantly shown similar levels of benefit and corrective measures continue. Project results thus contribute important basic knowledge and applied electrostatics technology which will provide agriculture with alternative/supplemental mechanized pollination systems as tranditional pollen-transfer vectors are further endangered by natural and man-fade factors.
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Journal articles
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