科技论文和展示

这里您可以找到在全球 COMSOL 年会上所有用户报告的演示文稿。这些演示文稿介绍 COMSOL 用户是如何使用 COMSOL Multiphysics 进行创新性研究和产品设计。研究主题涵盖了包括电气、机械、流体和化工等范围广泛的行业和应用领域。请使用“快速搜索”来查找与您的研究领域相关的演示文稿。

Simulation of AC Loss in High Temperature Superconducting Cable using COMSOL Multiphysics

G. Konar[1], R. K. Mandal[1], A. Chakrabarty[1], J. Das[1], and N. Chakraborty[1]
[1]Power Engineering Department, Jadavpur University, Kolkata, West Bengal, India

In this paper simulation of the alternating current loss (AC loss) in a high temperature superconducting tape and a HTS cable having 4 layers of polygon conductors using COMSOL Multiphysics software has been reported. The simulation results for the single rectangular tape are verified with the Norris equation for a HTS tape. The effect of increased number of layers on AC loss is also observed ...

FEMLAB Simulation von Hohlkathodenentladungen zur Erzeugung von extrem ultravioletter (EUV) Strahlung

Wieneke, S., Kromer, J., Ach, F., Viöl, W.
Hochschule für angewandte Wissenschaft und Kunst, Fakultät Naturwissenschaften und Technik, Göttingen

Für intensive Strahlungsquellen im Spektralbereich von Vakuumultraviolett (VUV, 10 -200 nm) über extremes Ultraviolett (XUV, 1 – 10 nm) bis in den Bereich der weichen Röntgenstrahlung (SXR, 0,1 – 1 nm) (siehe Abbildung 1) besteht in Forschung und Industrie ein hoher Bedarf, der in der Zukunft noch deutlich wachsen wird. Insbesondere im Bereich der Röntgenlithographie zur Herstellung von ...

Multiphysics Analysis for the Electromagnetic Vibration Absorber

K. Liu, and Y. He
Department of Mechanical Engineering, Lakehead University, Thunder Bay, ON, Canada

This paper reports a multiphysics analysis for a newly developed electromagnetic vibration absorber (EMVA). The EMVA uses an electromagnet, permanent magnet, and aluminum beam to form a variable spring. By changing the current of the electromagnet, the stiffness of the EMVA can be adjusted instantaneously. Such a device belongs to the family of tunable vibration absorbers. The tunable vibration ...

Studies on Electrostatic Field of a Resistive Plate Chamber

A. Jash[1], N. Majumdar[1], S. Mukhopadhyay[1], S. Chattopadhyay[4]
[1]Saha Institute of Nuclear Physics, Kolkata, West Bengal, India
[4]Variable Energy Cyclotron Centre, Kolkata, West Bengal, India

Resistive plate chambers (RPC) are fast gaseous detectors, having a simple design and construction, good time resolution and high efficiency. These are extensively used in high energy physics experiments. A large number of RPCs will be used as the main detector element for India’s mega science project, India Based Neutrino Observatory (INO). So, detailed study of this detector is very crucial ...

Power transmission lines generated electric and magnetic fields calculations

EL-Fouly, T.H.M.1, EL-Saadany, E.F.1, Salama, M.M.A.1, Abdel-Galil, T.K.2, Habiballah, I.O.2
1 Electrical and Computer Engineering Dept., University of Waterloo, Waterloo, Ontario, Canada
2 King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia

This paper invetigates using the FEMLAB software modules in calculating the electromagnetic fields generated in the vicinity of High Voltage (HV) power transmission lines. The analysis presented in this paper is divided into two main parts. The first part investigate the effectivness of using the electrostatic and magnetotstatic modules of the FEMLAB software in claculating the generated ...

Permanent Magnet Arrangements for Low-Field NMR

C. Horch[1], S. Schlayer[1], and F. Stallmach[1]
[1]Faculty of Physics and Earth Sciences, University of Leipzig, Leipzig, Germany

For low-field NMR (Nuclear magnetic resonance), NdFeB permanent magnet arrangements are proposed to provide the static polarizing magnetic field. Especially a parallel and a circular arrangement of the permanent magnets, iron yokes and small shim magnets were tested and improved by COMSOL. The intent was to guide the design and the construction of NMR magnets by calculating the magnetic field ...

Analysis of Forces acting on Superparamagnetic beads in fluid medium in Gradient Magnetic Fields

U. Veeramachaneni[1], and R.L. Carroll[1]

[1]Department of Chemistry, West Virginia University, Morgantown, West Virginia, USA

Superparamagnetic micro beads offer some  attractive applications in biological and biomedical fields. Some of the important applications include manipulation and separation of cells, isolation of specific cells, active drug delivery, magnetic cell separation, separation of proteins, and application of mechanical forces to cells, etc. A COMSOL Multiphysics model is developed in 2D ...

Design of Three Phase Homopolar Synchrone Reluctance Machine with Double Statoric Winding and Double Massive Rotor

C. Belalahy, I. Rasoanarivo, S. Rael, and F. M. Sargos
GREEN Institut National Polytechnique de Lorraine, Vandoeuvre lès Nancy, France

This paper deals with the design of a three phase synchronous reluctance machine constituted by two stators and two massive rotors. A coil is placed in the stator, between the two salient poles of the rotor. These poles can have parallel or perpendicular axes. Such structures allow the rotor to work as an inertial load and provide high dynamic performances with regards to energy conversion, a ...

3-D Modeling of a Differential Impedance Obstacle Detection Sensor for Horizontal Directional Drilling Operations

J. N. Shah1, A. Jaganathan1, E. N. Allouche1, M. Kieba2, and C. J. Ziolkowski2
1Louisiana Tech University, Ruston, LA, USA
2Gas Technology Institute, Chicago, IL, USA

Horizontal Directional Drilling (HDD) is a commonly used technology for the installation of pipelines, conduits and cables in urban areas and across obstacles such as rivers, railways and freeways. A main concern in using the HDD method is the risk of hitting existing buried utilities during the boring process. The Differential Impedance Obstacle Detection (DIOD), developed by the Gas Technology ...

Benchmark of COMSOL vs. ROXIE Codes for the Calculation of a Particle Accelerator Quadrupole

I. Rodriguez, and J. L. Munoz
ESS Bilbao
Bilbao, Spain

The field quality requirements of most particle accelerator magnets are very tight and, therefore, very precise simulations are needed to accurately calculate these devices. CERN\'s ROXIE code is widely used as a reference software to calculate normal conducting and superconducting magnets for particle accelerator applications. ROXIE uses the full vector potential coupled to the BEM-FEM method ...

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