S. Mishra , S. K. Saxena , P. Yogi , P. R Sagdeo , R. Kumar ,
 Indian Institute of Technology Indore, Indore, Madhya Pradesh, India
In the present work, we have studied the electron transport properties of single silicon nanowire using Semiconductor Module of COMSOLMultiphysics software. We construct a MSM (metal-semiconductor-metal) model where metal is selected as copper and semiconductor is taken as silicon. Silicon is doped with n-type impurity by increasing doping concentration. Further, the Schottky diodes formed at ...
王 松 , , 唐小金 
 军械工程学院静电与电磁防护研究所, 石家庄，河北，中国
 北京卫星环境工程研究所, 北京，中国
摘要：在太空高能带电粒子作用下，航天器上存在绝缘介质深层充电的危险。介质内沉积电荷导致局部出现强电场（达到107V/m），有可能造成介质击穿放电。一方面，充电过程与介质电导率密切相关，而电导率受温度影响显著，另一方面，介质中的通电导体发热会影响介质的局部温度，于是有必要综合考虑介质中电场与热场的耦合变化过程。对此，我们建立了考虑电场与热场耦合变化的介质深层充电模型，并采用 COMSOL Multiphysics® 软件，实现了数值求解。结果表明，在一定的空间辐射环境下，考虑热场是十分重要的，热导率会对充电结果产生不可忽视的影响。该模型有利于多因素作用下的航天器介质深层充电评估计算。 1. 引言： 近些年，卫星充放电效应得到了广泛关注和研究[1, 2]。太空高能电子会射入航天器绝缘介质中，因为该介质极低电导率（10-15S/m量级），使得内部沉积电荷难以泄放 ...
Sonsight Inc. / NSWC, Accokeek, MD, USA
Cogging torque in permanent magnet motors and generators is characterized by a torque ripple. These torque fluctuations cause vibrations, noise and speed fluctuations. This paper presents finite element (FE) analyses results that show a previously unaddressed low frequency modulation of cogging torque ripple. The paper resulted in an analytical formulation of cogging torque with low frequency ...
V. Sharma, S. Narmadha, S.K. Dash, R. Veerasamy, B.K. Nashine, K.K. Rajan, and P. Kalyanasundaram
IGCAR, Kalpakkam, Tamil Nadu, India
Prototype Fast Breeder Reactor (PFBR) is a 500MWe, sodium cooled, pool type, mixed oxide (MOX) fuelled reactor. Sodium flow measurement in various loops of the reactor is of prime importance from the operational and safety aspects. To measure the flow of electrically conducting sodium in large secondary circuit pipes, probe type permanent magnet flowmeters (PTFM) are used. PTFM works on the ...
S.M. Musa, M.N.O. Sadiku, and O.D. Momoh
Prairie View A&M University, Prairie View, TX, USA
Indiana University-Purdue University, Fort Wayne, IN, USA
This paper presents an analysis approach of multicondcutor quasi-TEM lines transmission interconnect in a single dielectric region and multimode waveguides using the finite element method (FEM). FEM is especially suitable and effective for the computation of electromagnetic fields in strongly inhomogeneous media. We illustrate that FEM is suitable and effective as other methods for modeling of ...
Middle East Technical University
In this study, a detailed finite element model coupling the motion dynamics and electromagnetics of a diaphragm based MEMS vibration energy harvester is presented. The energy harvester converts low frequency vibrations to high frequency response by magnetic actuation of a diaphragm carrying coils. AC/DC, Solid Mechanics and Moving Mesh (ALE) modules are coupled together in one 3-D model to ...
E. Bianchi, F. Bellati, E. Rollo, G. Dubini, C. Guiducci
Politecnico di Milano, LaBS, Laboratory of Biological Structure Mechanics, Milano, Italy
Swiss Federal Institute of Technology (EPFL), Laboratory of Life Sciences Electronics - Swiss Up Chair, Lausanne, Switzerland
A model of a cell counter sensor based on Impedance Spectroscopy (IS) has been implemented in COMSOL Multiphysics. The cell counter is a silicon-based microdevice consisting in 3D electrodes placed in a wide microchannel: cells flow in the microchannel through the electrodes to be detected. The model allows to evaluate the functionality of the device depending on geometrical parameters and ...
M. Valentinuzzi, E. Ceccolini, D. Mostacci, M. Sumini, F. Rocchi
Montecuccolino Nuclear Engineering Laboratory, University of Bologna, Bologna, Italy
UTFISSM-PRONOC, ENEA, Bologna, Italy
The electron beam emitted backward by Plasma Focus devices is being investigated as a radiation source for IORT (Intra-Operative Radiation Therapy) applications. A Plasma Focus device is being developed to this aim. The electron beam is driven through an electron pipe made of stainless steel to impinge on a 50 ?m brass foil, where conversion X-rays are generated. Electromagnetic forces in the ...
H.P. Schmidt , U. Vogl
UAS HAW Amberg-Weiden, Amberg, Germany
For the design of an inductive power and data transfer electromagnetic calculation are carried out. A transfer system is considered for loads that are distributed across some distances. For example, such loads are adjustable speed drives that are found in factory automation and intra-logistic. Physical properties of the inductive transfer are modeled via COMSOL. Lumped parameters are deduced ...
M.K. Ghantasala, B.O. Asimba, A. Khaminwa, K.J. Suthar, D.C. Mancini
Department of Mechanical and Aeronautical Engineering, Western Michigan University, Kalamazoo, MI, USA
Advanced Photon Source, Argonne National Laboratory, Argonne, IL, USA
Physical Sciences and Engineering, Argonne National Laboratory, Argonne, IL, USA
The understanding of pH-sensitive hydrogel swelling response in different buffer environmental condition is essential for its use in different practical applications. This necessitates its simulation in steady state and transient conditions. This paper mainly deals with the details of the numerical simulation performed by developing coupled formulation of chemo-electro-mechanical behavior of ...