Готові списки джерел за темами / MAXWELL 3D SIMULATION

Добірка наукової літератури з теми "MAXWELL 3D SIMULATION"

Автор: Grafiati

Опубліковано: 11 вересня 2023

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Статті в журналах з теми "MAXWELL 3D SIMULATION"

Rong-yan, Guo, and Shi Shui-e. "AC Contactor Electromagnetic Mechanism Dynamic Simulation Study." Open Electrical & Electronic Engineering Journal 8, no. 1 (December 31, 2014): 419–27. http://dx.doi.org/10.2174/1874129001408010419.

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In this paper, we study the application of Maxwell 3D and ADAMS software for simulation and analysis of electromagnetic system, with UG software for AC contactor and main contact system of electromagnetic system. We then study the influence of harmonic on type CJX2-40 AC contactor main contact system and operation characteristics. To establish a three-dimensional finite element model of electromagnetic mechanism of AC contactor, we take Maxwell 3D software, on the model of finite element mesh, the calculation of different closing sine excitation and containing under harmonic excitation angle electromagnetic system. For the static and dynamic characteristics of AC contactor, static magnetic field distribution and the suction characteristic curve drawing, we do a comparative study of the results of the simulation, analysis of the influence of harmonics on the AC contactor motion characteristics.

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Ganse, Urs, Tuomas Koskela, Markus Battarbee, Yann Pfau-Kempf, Konstantinos Papadakis, Markku Alho, Maarja Bussov, et al. "Enabling technology for global 3D + 3V hybrid-Vlasov simulations of near-Earth space." Physics of Plasmas 30, no. 4 (April 2023): 042902. http://dx.doi.org/10.1063/5.0134387.

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We present methods and algorithms that allow the Vlasiator code to run global, three-dimensional hybrid-Vlasov simulations of Earth's entire magnetosphere. The key ingredients that make Vlasov simulations at magnetospheric scales possible are the sparse velocity space implementation and spatial adaptive mesh refinement. We outline the algorithmic improvement of the semi-Lagrangian solver for six-dimensional phase space quantities, discuss the coupling of Vlasov and Maxwell equations' solvers in a refined mesh, and provide performance figures from simulation test runs that demonstrate the scalability of this simulation system to full magnetospheric runs.

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Zhang, Guang Cai, Hong Fu Ai, Ya Jie Xu, Qiao Yan Chen, and Xiao Dong Yang. "The Design of Small H-Style Permanent Magnet Used for NMR." Applied Mechanics and Materials 703 (December 2014): 114–18. http://dx.doi.org/10.4028/www.scientific.net/amm.703.114.

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This paper introduces the design of permanent magnet that can been used to small nuclear magnetic resonance (NMR) system, and its static magnetic field simulation analysis uses Ansoft's Maxwell software. According to the theory of magnetic circuit design and the performance requirements of magnetic field, An H-style permanent magnetic actuator has been designed, and it can generate uniform magnetic field larger than 0.4 T in the interested region of this actuator. The static magnetic field simulation analysis of this permanent magnetic actuator has done by Ansoft's Maxwell 3D software, and the experimental results show that the design of permanent magnet can meet the requirements.

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Chen, Keyu, Marcus Hartwig, and Shahram Amoozegar. "Electric machine noise and vibration prediction and validation through test." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 264, no. 1 (June 24, 2022): 309–16. http://dx.doi.org/10.3397/nc-2022-735.

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In this paper, a finite element (FE) simulation process for the NVH prediction of electric motors is proposed. The proposed process first simulates the motor excitation forces using a 2D electromagnetic force model which is derived from Maxwell and then it applies these forces to a simplified 3D electric machine model. This simplified 3D model is validated by comparing the structural transfer functions calculated from impact hammer test and FE simulation. Finally, the proposed simulation process is validated by comparing predicted sound pressure levels at different selected locations to an electric motor NVH test results from a semi-anechoic chamber.

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Peng, Wen Zhen, Shu Min Wan, Bin Lin, Li Peng Sun, and Mei Ning Yang. "Finite Element Simulation of Electromagnetic Properties of Ferrite Material." Materials Science Forum 770 (October 2013): 29–33. http://dx.doi.org/10.4028/www.scientific.net/msf.770.29.

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As the inductance of magnetic cores is the most important parameter for their service performance. Four coupling models of EE-type ferrite cores are established to analyze the relationship between surface quality and the inductance of ferrite cores. Besides, 3D FEM simulation of different models is made by ANSOFT MAXWELL software. The results show that the surface quality has a direct influence on the service performance of ferrite devices.

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Song, Shou Xiang, Liang Zou, Tong Zhao, Li Zhang, Qing Quan Li, and Meng Qi Liu. "FEM Simulations of Permanent-Magnet-Biased Saturation Based Fault Current Limiter." Advanced Materials Research 960-961 (June 2014): 867–70. http://dx.doi.org/10.4028/www.scientific.net/amr.960-961.867.

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The fault current limit technology based on the principle of permanent-magnet-biased saturation has several outstanding advantages in both economy and technology. A modeling method of PMFCL based on the finite element analysis platform – Maxwell is presented in this paper. The current limiting mechanism of line-type PMFCL is analyzed, on the basis of which the 2D and 3D models are established in Maxwell, and the corresponding experiments are designed as well. Comparisons between the simulation and experimental results indicate that the modeling method is reasonable. Research achievements of this paper provides theoretical basis for further studies of PMFCL.

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Du, Lin, Geng Chen Shi, and Jing Jing Zhao. "Static Characteristics of Micro Disc Magneto Electric Generator – Simulation and Experiment." Applied Mechanics and Materials 365-366 (August 2013): 356–59. http://dx.doi.org/10.4028/www.scientific.net/amm.365-366.356.

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Maxwell 3D software of finite-element analysis in electromagnetic fields is used to model and simulate the micro disc magneto electric generator. Distribution characteristics of magnetic induction are required and theoretical analysis and calculation is presented. Error between the simulation result and experimental result is about 6% which verify the rationality and accuracy of finite-element simulation. It can be used to guide the structural design and optimization of this type of generator.

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Blome, Mark, Kevin McPeak, Sven Burger, Frank Schmidt, and David Norris. "Back-reflector design in thin-film silicon solar cells by rigorous 3D light propagation modeling." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 33, no. 4 (July 1, 2014): 1282–95. http://dx.doi.org/10.1108/compel-12-2012-0367.

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Purpose – The purpose of this paper is to find an optimized thin-film amorphous silicon solar cell design by numerically optimizing the light trapping efficiency of a pyramid-structured back-reflector using a frequency-domain finite element Maxwell solver. For this purpose short circuit current densities and absorption spectra within the investigated solar cell model are systematically analyzed. Furthermore, the authors employ a topology simulation method to accurately predict the material layer interfaces within the investigated solar cell model. The method simulates the chemical vapor deposition (CVD) process that is typically used to fabricate thin-film solar cells by combining a ballistic transport and reaction model (BTRM) with a level-set method in an iterative approach. Predicted solar cell models are far more realistic compared to solar cell models created assuming conformal material growth. The purpose of the topology simulation method is to increase the accuracy of thin-film solar cell models in order to facilitate highly accurate simulation results in solar cell design optimizations. Design/methodology/approach – The authors perform numeric optimizations using a frequency domain finite element Maxwell solver. Topology simulations are carried out using a BTRM combined with a level-set method in an iterative fashion. Findings – The simulation results reveal that the employed pyramid structured back-reflectors effectively increase the light path in the absorber mainly by exciting photonic waveguide modes. In using the optimization approach, the authors have identified solar cell models with cell periodicities around 480 nm and pyramid base widths around 450 nm to yield the highest short circuit current densities. Compared to equivalent solar cell models with flat back-reflectors, computed short circuit current densities are significantly increased. Furthermore, the paper finds that the solar cell models computed using the topology simulation approach represent a far more realistic approximation to a real solar cell stack compared to solar cell models computed by a conformal material growth assumption. Research limitations/implications – So far in the topology simulation approach the authors assume CVD as the material deposition process for all material layers. However, during the fabrication process sputtering (i.e. physical vapor deposition) will be employed for the Al:ZnO and ITO layers. In the framework of this ongoing research project the authors will extend the topology simulation approach to take the different material deposition processes into account. The differences in predicted material interfaces will presumably be only minor compared to the results shown here and certainly be insignificant relative to the differences the authors observe for solar cell models computed assuming conformal material growth. Originality/value – The authors systematically investigate and optimize the light trapping efficiency of a pyramid nano-structured back-reflector using rigorous electromagnetic field computations with a 3D finite element Maxwell solver. To the authors’ knowledge such an investigation has not been carried out yet in the solar cell research literature. The topology simulation approach (to the best of the authors’ knowledge) has previously not been applied to the modelling of solar cells. Typically a conformal layer growth assumption is used instead.

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Tang, Hao, Dongpo Wang, and Zhao Duan. "New Maxwell Creep Model Based on Fractional and Elastic-Plastic Elements." Advances in Civil Engineering 2020 (February 10, 2020): 1–11. http://dx.doi.org/10.1155/2020/9170706.

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Creep models are mainly used to describe the rheological behaviour of geotechnical materials. An important research focus for studying creep in geotechnical materials is the development of a model with few parameters and good simulation performance. Hence, in this study, by replacing the Newtonian dashpot and spring in the classical Maxwell model with fractional and elastic-plastic elements, a new Maxwell creep model based on fractional derivatives and continuum damage mechanics was developed. One- and three-dimensional (1D/3D) creep equations of the new Maxwell creep model were derived. The 1D creep equation of the new model was used to fit existing creep data of rock salt, and the 3D creep equation was used to fit the creep data of remolded loess. The model curves matched the creep data very well, showing considerably higher accuracy than other models. Furthermore, a sensitivity study was carried out, showing the effects of the fractional derivative order β and exponent α on the creep strain of rock salt. This new model is simple with few parameters and can effectively simulate the complete creep behaviour of geotechnical materials.

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Su, Yu, Le Gong, Hui Cao, and Dan Dan Chen. "Optimization of Electrostatic Atomization Cutting Using 3D FE Simulation of Electrostatic Field." Key Engineering Materials 693 (May 2016): 1255–62. http://dx.doi.org/10.4028/www.scientific.net/kem.693.1255.

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Compared with minimal quantity lubrication (MQL), electrostatic atomization can control the movement of mist droplets by changing the electrostatic field, thus reducing the drift of mist droplets in air. This paper first proposes the concept of electrostatic atomization cutting, and then develops a 3D FE model of electrostatic field for electrostatic atomization cutting using a commercial software Ansoft Maxwell. By simulation, the influence of nozzle angle, structure, and electrode gap and voltage on electric field intensity is investigated. Based on simulation results, the optimal nozzle angle and structure are obtained for electrostatic atomization cutting. The findings contribute to further development of this technique.

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Більше джерел

Дисертації з теми "MAXWELL 3D SIMULATION"

Talaalout, Lahcen. "Simulation de la décharge électrostatique d'un satellite en orbite géostationnaire par un modèle 3D d'approximation des équations de Maxwell-Vlasov." Bordeaux 1, 1996. http://www.theses.fr/1996BOR10611.

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L'environnement spatial est constitue d'electrons et de protons qui chargent les differentes parties du satellite en orbite. Il y a creation de courants et de champs electromagnetiques entrainant un mauvais fonctionnement des circuits electriques. L'objet est ici de simuler ces phenomenes par resolution des equations de maxwell-vlasov en etudiant le comportement des champs magnetiques, electriques et des electrons emis

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Le, Bourdiec Solène. "Méthodes déterministes de résolution des équations de Vlasov-Maxwell relativistes en vue du calcul de la dynamique des ceintures de Van Allen." Phd thesis, Ecole Centrale Paris, 2007. http://tel.archives-ouvertes.fr/tel-00146258.

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Les satellites artificiels baignent dans un environnement radiatif hostile qui conditionne en partie leur fiabilité et leur durée de vie en opération : les ceintures de Van Allen. Afin de les protéger, il est nécessaire de caractériser la dynamique des électrons énergétiques piégés dans les ceintures radiatives. Elle est déterminée essentiellement par les interactions entre les électrons énergétiques et les ondes électromagnétiques existantes.

Le travail de cette thèse a consisté à concevoir un schéma numérique original pour la résolution du système d'équations modélisant ces interactions : les équations de Vlasov-Maxwell relativistes. Notre choix s'est orienté vers des méthodes d'intégration directe. Nous proposons trois nouvelles méthodes spectrales pour discrétiser en impulsion les équations : une méthode de Galerkin et deux méthodes de type collocation. Ces approches sont basées sur des fonctions de Hermite qui ont la particularité de dépendre d'un facteur d'échelle permettant d'obtenir une bonne résolution en vitesse.

Nous présentons dans ce manuscript les calculs conduisant à la discrétisation et à la résolution du problème de Vlasov-Poisson monodimensionnel ainsi que les résultats numériques obtenus. Puis nous étudions les extensions possibles des méthodes au problème complet relativiste. Afin de réduire les temps de calcul, une parallélisation et une optimisation des algorithmes ont été mises en \oe uvre. Enfin, les calculs de validation du code 1Dx-3Dv, à partir d'instabilités de types Weibel et whistlers, à une ou deux espèces d'électrons, sont détaillés.

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Hlubinka, David. "Teplotní vlastnosti automobilových zdrojů světla - Halogenové zdroje." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-318096.

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The aim of master´s thesis is to get acquainted with the design and materials used in selected automotive light source – tungsten halogen lamp. Further, the thesis focused on the theory and appropriate selection of the thermal measurement method on a real sample. Subsequently, a model of the light source and its simulation in the ANSYS – Maxwell 3D and Mechanical programs are created. Finally, the results of the thermal simulation and the non-contact measurement of the tungsten halogen lamp are evaluated

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Beckstein, Pascal. "Methodenentwicklung zur Simulation von Strömungen mit freier Oberfläche unter dem Einfluss elektromagnetischer Wechselfelder." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-232474.

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Im Bereich der industriellen Metallurgie und Kristallzüchtung treten bei zahlreichen Anwendungen, wo magnetische Wechselfelder zur induktiven Beeinflussung von leitfähigen Werkstoffen eingesetzt werden, auch Strömungen mit freier Oberfläche auf. Das Anwendungsspektrum reicht dabei vom einfachen Aufschmelzen eines Metalls in einem offenen Tiegel bis hin zur vollständigen Levitation. Auch der sogenannte RGS-Prozess, ein substratbasiertes Kristallisationsverfahren zur Herstellung siliziumbasierter Dünnschichtmaterialien, ist dafür ein Beispiel. Um bei solchen Prozessen die Interaktion von Magnetfeld und Strömung zu untersuchen, ist die numerische Simulationen ein wertvolles Hilfsmittel. Für beliebige dreidimensionale Probleme werden entsprechende Berechnungen bisher durch eine externe Kopplung kommerzieller Programme realisiert, die für Magnetfeld und Strömung jeweils unterschiedliche numerische Techniken nutzen. Diese Vorgehensweise ist jedoch im Allgemeinen mit unnötigem Rechenaufwand verbunden. In dieser Arbeit wird ein neu entwickelter Methodenapparat auf Basis der FVM vorgestellt, mit welchem sich diese Art von Berechnungen effizient durchführen lassen. Mit der Implementierung dieser Methoden in foam-extend, einer erweiterten Version der quelloffenen Software OpenFOAM, ist daraus ein leistungsfähiges Werkzeug in Form einer freien Simulationsplattform entstanden, welches sich durch einen modularen Aufbau leicht erweitern lässt. Mit dieser Plattform wurden in foam-extend auch erstmalig dreidimensionale Induktionsprozesse im Frequenzraum gelöst.

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KRISHNA, KUNAL. "SELECTION OF OPTIMUM DESIGN OF MR FINISHING TOOL AND ITS ANALYSIS FOR FINISHING OF EN-31 WORKPIECE SURFACE." Thesis, 2023. http://dspace.dtu.ac.in:8080/jspui/handle/repository/19977.

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Magneto-rheological finishing (MRF) is a novel and promising technique used for precision machining and polishing of various workpiece materials. Present work is aimed to design MR finishing tool in ANSYS Maxwell 3D simulation software for finishing variety of workpiece materials. Design of experiment has been used with two parameters such as bush height and number of turns to develop the experimental plan using design expert software. Modelled MR finishing tool has been tested with different experimental run to observe the shape and intensity of magnetic field at MR finishing tool tip. Statistical analysis has been done to see the effect of bush height and number of turns on magnetic field intensity at MR finishing tool tip. Linear model has been selected in the analysis and analysis of variance (ANOVA) has been done with model p values less than 0.0001 along with F value 566.41 which indicates that the model selected is significant and lack of fit with p value 0.1265 indicates insignificant. Regression equation has been obtained in coded form as well as actual form to see the effect of bush height and number of turns on response intensity of magnetic field at MR finishing tool tip. It has been observed that the predicted intensity of magnetic field at tool tip is found 1.99885 T for bush height 6.63 mm and number of turns 2133. After obtaining predicted intensity of magnetic field, numerical optimization has been carried out and found that maximum intensity of magnetic field is obtained 1.999 T for bush height 6.628 mm and number of turns 2132 which is very close to the predicted value of magnetic field intensity.

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Beckstein, Pascal. "Methodenentwicklung zur Simulation von Strömungen mit freier Oberfläche unter dem Einfluss elektromagnetischer Wechselfelder." Doctoral thesis, 2017. https://tud.qucosa.de/id/qucosa%3A30749.

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Частини книг з теми "MAXWELL 3D SIMULATION"

Zamorano Ulloa, Rafael. "Electromagnetism of Microwave Heating." In Electromagnetic Wave Propagation for Industry and Biomedical Applications. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.97288.

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Detailed electrodynamic descriptions of the fundamental workings of microwave heating devices are presented. We stress that all results come from Maxwell equations and the boundary conditions (BC). We analyze one by one the principal components of a microwave heater; the cooking chamber, the waveguide, and the microwave sources, either klystron or magnetron. The boundary conditions at the walls of the resonant cavity and at the interface air/surface of the food are given and show how relevant the BC are to understand how the microwaves penetrate the nonconducting, electric polarizable specimen. We mention the application of microwaving waste plastics to obtain a good H2 quantity that could be used as a clean energy source for other machines. We obtained trapped stationary microwaves in the resonant cavity and traveling waves in the waveguides. We show 3D plots of the mathematical solutions and agree quite well with experimental measurements of hot/cold patterns. Simulations for cylindrical cavities are shown. The radiation processes in klystrons and magnetrons are described with some detail in terms of the accelerated electrons and their trajectories. These fields are sent to the waveguides and feed the cooking chamber. Whence, we understand how a meal or waste plastic, or an industrial sample is microwave heated.

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Тези доповідей конференцій з теми "MAXWELL 3D SIMULATION"

Wang, Jilong, Jenny Qiu, and Shiren Wang. "3D Core-Shell Simulation of Hydrogel Swelling Behavior for Controlled Drug Delivery." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-65070.

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In this paper, a three-dimensional dynamic model describing drug delivery and swelling behavior of polyelectrolyte gels was developed based on the Maxwell-Stefan equation and Bio-heat equation. COMSOL software was employed to simulate hydrogel swelling and the transportation of created automatically by COMSOL, and it had 78035 elements, which was unconcerned with the results. The results showed that Maxwell-Stefan equation and Bio-heat equation were suitable for modeling hydrogel behavior of swelling with temperature change. In addition, when temperature increased, the hydrogel swelling increased which also intensified drug release.

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Mueller, Tobias, Chan See, Arfan Ghani, and Peter Thiemann. "Simulation of PMSM in maxwell 3D/simplorer to optimize direct flux control." In 2017 IEEE 26th International Symposium on Industrial Electronics (ISIE). IEEE, 2017. http://dx.doi.org/10.1109/isie.2017.8001274.

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Shao, X., N. Goldsman, O. Ramahi, and P. N. Guzdar. "A new method for simulation of on-chip interconnects and substrate currents with 3D alternating-direction-implicit (ADI) Maxwell solver." In IEEE International Conference on Simulation of Semiconductor Processes and Devices. IEEE, 2003. http://dx.doi.org/10.1109/sispad.2003.1233700.

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Yuan, Chengdong, Dennis Hohlfeld, and Tamara Bechtold. "Towards System-level Simulation of an Electromagnetic Energy Harvester Model via Equivalent Circuit Extraction from ANSYS Maxwell 3D." In 2023 24th International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE). IEEE, 2023. http://dx.doi.org/10.1109/eurosime56861.2023.10100816.

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Zhang, Jun Xia, Li Wang, Ping Wu, Hong Ying Li, and Li Ge Tong. "Numerical Simulation of In-Tube Condensation Heat Transfer in the Presence of High Partial Pressure Non-Condensable Gases." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-11119.

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To enhance the practicality of the separate type heat tube in large-scale industrial application, the authors have adopted a non-vacuum separate type heat tube in which quantitatively predicting condensation heat transfer of vapor in the presence of stagnant high partial pressure non-condensable (NC) gases is vital to the task of design. So the condensation heat transfer in a V-shape tube with high partial pressure non-condensable gases was simulated based on a 3D steady state VOF model coupled with the MS (Maxwell-Stefan) equation for considering the effect of stagnant high partial pressure non-condensable gases on condensation heat transfer. The results show that the high partial pressure non-condensable gases have a limited influence on the condensation heat transfer, and they are constrained in a narrow space at the rear of the tube due to the forced convective vapor, therefore, a small part of the pipe wall has lower local heat flux and condensation heat transfer coefficient, while most part of pipe wall has higher performance of condensation heat transfer. The calculated results are in agreement with the experimental data.

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Smajic, Jasmin, Walter Holaus, Jadran Kostovic, and Uwe Riechert. "3D full-Maxwell simulations of very fast transients in GIS." In 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation (CEFC 2010). IEEE, 2010. http://dx.doi.org/10.1109/cefc.2010.5481807.

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Zhang, Lijun, Jie Xu, and Dejian Meng. "Research on Electromagnetic Vibration and Noise Characteristics of Double-rotor Permanent Magnet Synchronous In-wheel Motor." In FISITA World Congress 2021. FISITA, 2021. http://dx.doi.org/10.46720/f2020-adm-030.

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This paper presents a method based on the finite element simulation, the electromagnetic field, electromagnetic force, electromagnetic vibration and electromagnetic noise characteristics of a double-rotor permanent magnet synchronous in-wheel motor under multiple operating conditions are systematically studied. On the integration of previous methods, a program of multi-physics modeling and analysis of electromagnetic vibration and noise of motor is set up. Firstly, a new electromagnetic structure design of double-rotor permanent magnet synchronous in-wheel motor is proposed. Based on Maxwell stress equation, the analytical model of the radial electromagnetic force of the motor is established. The spatial domain, time domain and frequency domain analysis of the internal and external electromagnetic force and torque ripple of the double-rotor permanent magnet synchronous in-wheel motor are carried out by means of finite element simulation. Analysis shows that the radial electromagnetic force before the 5th order is mainly influential, tangential electromagnetic force before the 4th order is mainly influential. With the increasing of order, the amplitude is gradually reduced. The amplitude of the first order is the highest. According to the different modeling methods of stator windings, four finite element models in 3D structural field are designed for the double-rotor permanent magnet synchronous in-wheel motor. Then, the effects of quality and stiffness of the effective length and end of stator windings on the stator modal frequency are summarized and compared. The results show that the effect of winding mass and stiffness on the overall modal frequency of the stator is nearly canceled. After that, the 3D structural field model of the double-rotor permanent magnet synchronous in-wheel motor is used to simulate the transient dynamics under radial concentrated force loading. Based on the simulation results, the inner and outer lateral deformation of stator is analyzed in time domain and frequency domain. Finally, the harmonic response analysis of 3D structural field model of the double-rotor permanent magnet synchronous in-wheel motor is proposed, and the 3D sound field boundary element model of electromagnetic noise is established. The acoustic boundary element analysis under multiple operating conditions is carried out, including sound pressure analysis of stator surface, sound pressure analysis of field point and analysis of sound pressure frequency response characteristics at different field points. The results show that the electromagnetic noise of motor is more sensitive to the high frequency excitation, and the sensitivity of the electromagnetic noise in the radial position is significantly larger than that of the axial position. The analysis process proposed in this paper can provide support for the prediction, optimization and analysis of influencing factors of electromagnetic vibration and noise during the period of motor design.

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Cinosi, N., S. P. Walker, and M. J. Bluck. "Modelling of sub-wavelength optical apertures in thin metal sheets via 3D transient Maxwell's equations." In NUSOD '05. Proceedings of the 5th International Conference on Numerical Simulation of Optoelectronic Devices. IEEE, 2005. http://dx.doi.org/10.1109/nusod.2005.1518154.

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Tai Qiao, Tien-Hao Liao, Leung Tsang, Douglas Vandemark, and Simon Yueh. "Radar backscattering from dielectric random rough surfaces using 3D numerical simulation of Maxwell's equation." In 2016 Progress in Electromagnetic Research Symposium (PIERS). IEEE, 2016. http://dx.doi.org/10.1109/piers.2016.7735534.

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Hsu, C. T., S. W. Chiang, and K. F. Sin. "A Novel Dynamics Lattice Boltzmann Method for Gas Flows." In ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-31237.

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Анотація:

The lattice Boltzmann method (LBM), where discrete velocities are specifically assigned to ensure that a particle leaves one lattice node always resides on another lattice node, has been developed for decades as a powerful numerical tool to solve the Boltzmann equation for gas flows. The efficient implementation of LBM requires that the discrete velocities be isotropic and that the lattice nodes be homogeneous. These requirements restrict the applications of the currently-used LBM schemes to incompressible and isothermal flows. Such restrictions defy the original physics of Boltzmann equation. Much effort has been devoted in the past decades to remove these restrictions, but of less success. In this paper, a novel dynamic lattice Boltzmann method (DLBM) that is free of the incompressible and isothermal restrictions is proposed and developed to simulate gas flows. This is achieved through a coordinate transformation featured with Galilean translation and thermal normalization. The transformation renders the normalized Maxwell equilibrium distribution with directional isotropy and spatial homogeneity for the accurate and efficient implementation of the Gaussian-Hermite quadrature. The transformed Boltzmann equation contains additional terms due to local convection and acceleration. The velocity quadrature points in the new coordinate system are fixed while the correspondent points in the physical space change from time to time and from position to position. By this dynamic quadrature nature in the physical space, we term this new scheme as the dynamic quadrature scheme. The lattice Boltzmann method (LBM) with the dynamic quadrature scheme is named as the dynamic lattice Boltzmann method (DLBM). The transformed Boltzmann equation is then solved in the new coordinate system based on the fixed quadrature points. Validations of the DLBM have been carried with several benchmark problems. Cavity flows problem are used. Excellent agreements are obtained as compared with those obtained from the conventional schemes. Up to date, the DLBM algorithm can run up to Mach number at 0.3 without suffering from numerical instability. The application of the DLBM to the Rayleigh-Bernard thermal instability problem is illustrated, where the onset of 2D vortex rolls and 3D hexagonal cells are well-predicted and are in excellent agreement with the theory. In summary, a novel dynamic lattice Boltzmann method (DLBM) has been proposed with algorithm developed for numerical simulation of gas flows. This new DLBM has been demonstrated to have removed the incompressible and isothermal restrictions encountered by the traditional LBM.

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