Here you will find presentations given at COMSOL Conferences around the globe. The presentations explore the innovative research and products designed by your peers using COMSOL Multiphysics. Research topics span a wide array of industries and application areas, including the electrical, mechanical, fluid, and chemical disciplines. Use the Quick Search to find presentations pertaining to your application area.

A Study on Uniformity of a Magnet - new

P. Das[1], A. Reza[1], A. K. Sikdar[1], R. Bogi[2], A. Nandi[3]
[1]Variable Energy Cyclotron Centre, Kolkata, West Bengal, India
[2]Jalpaiguri Government Engineering College, Jalpaiguri, West Bengal, India
[3]Jadavpur University, Kolkata, West Bengal, India

Penning ion trap is a device used for three-dimensional confinement of ions for high precision nuclear and atomic physics studies. In a Penning ion trap, superposition of a strong homogeneous magnetic field and a weak quadrupole electric field confines the ions in a very small region. The uniformity and stability of magnetic field determines the confinement duration. An electromagnet has been ...


仵杰 [1], 史盼盼 [1],
[1] 西安石油大学,西安,陕西,中国

斜井和水平井中阵列感应响应特性研究是测井数据正确解释的基础。在斜井和水平井中,井轨迹可能以任意角度进出水平地层,阵列感应测井响应计算是复杂的三维电磁场数值计算。基于 COMSOL Multiphysics® 软件的 AD/DC 模块开发完成斜井和水平井中的阵列感应响应三维数值计算方法。详细计算分析水平井和斜井中井位置、目的层厚、目的层电导率、围岩电导率以及目的层与围岩电导率对比度对阵列感应测井响应的影响。结果表明,水平井的阵列感应测井响应特性取决于层厚、电导率对比度、子阵列间距、仪器距层界面距离等多种因素。当层厚大于仪器分层厚度时,水平井响应与直井响应接近;当层厚小于仪器分层厚度时,水平井响应与直井明显不同,在仪器进出界面时,响应出现明显尖峰;给定层厚,与直井比较,短阵列差别小,长阵列差别大。斜井中,当倾角小于30º时,响应受倾角影响小。当倾角从 30º 到 80º 变化时 ...

Dynamic Simulation of a Coaxial Magnetic Gear Using Global ODE's and the Rotating Machinery, Magnetic Interface

M. Ostroushko [1], W. Zhang [1], W. M. Rucker [1],
[1] Institute of Theory of Electrical Engineering, University of Stuttgart, Stuttgart, Germany

The coaxial magnetic gear is a good alternative to classic mechanical gears. The magnetic gear has high mechanical durability, overload protection and lower noise, than a mechanical gear [1,2]. A static model of a magnetic gear [3,4] is used for simulation of the magnetic fields and mechanical forces in the steady state. For the dynamic characteristic of the magnetic gear, i.e. a run-up, slowing ...

Features and Limitations of 2D Active Magnetic Levitation Systems Modeling in COMSOL Multiphysics

A. Piłat
AGH University of Science and Technology, Kraków, Poland

This elaboration presents the Active Magnetic Suspension (AMS) and radial Active Magnetic Bearing (AMB) as a representative of the Active Magnetic Levitation Systems (AMLS). The laboratory test rigs are analyzed in the 2D space. The control algorithm as well as the motion dynamics are implemented directly in COMSOL Multiphysics. The discussion on features and limitations is provided to show an ...

Calibration of MHD Flow Meter using COMSOL Multiphysics

S. Sahu[1], R. P .Bhattachryay[1], E. R. Kumar[1]
[1]Institute for Plasma Research, Bhat, Gandhinagar, Gujarat, India.

There is limited option for non-intrusive flow measurement of liquid metals at high temperature. Liquid metal flowing in a conduit along with the transverse magnetic field induces emf in the liquid metal. The emf developed; which has linear dependency on flow velocity; can be used for flow velocity estimation. In case of conducting conduit the emf can be measured at the conduit wall. The main ...

Dynamic Electromagnetic Analysis of Guitar Pickup Aided by COMSOL Multiphysics

T. Furukawa[1], H. Tanaka[2], H. Itoh[1], H. Fukumoto[1], M. Ohchi[2]
[1]Saga University, Saga City, Saga, Japan
[2]Chiba Institute of Technology

In transient analyses of electromagnetic fields with moving media, it is difficult to grasp the phenomena theoretically in the same manner of the convective heat diffusion since the treatment of the coupled problem with the field and dynamics must be necessary. In this presentation, we illustrate the dynamic magnetic flux patterns in the electric guitar pickup, where the string will move over ...

Design of an Electrodynamic Levitation System with COMSOL Multiphysics® Software - new

H. P. Ferreira[1], A. Endalecio[1], E. Rodriguez[1], R. M. Stephan[1]
[1]Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil

Levitation has found important applications in several areas of engineering, from microgravity to transportation systems. Electrodynamic levitation consists of the interaction of a varying in time magnetic field – provided by an alternating voltage supplying a coil or a moving permanent magnet. The main applications of this technique are MagLev trains and magnetic bearings. The electrodynamic ...

Influence of Voltage Type and Polarity on Electric Field Distribution Along a Polymeric Insulator

Arshad [1], Dr. A. Nekahi [1], S. McMeekin [1], M. Farzaneh [2]
[1] School of Engineering and Built Environment, Glasgow Caledonian University, United Kingdom
[2] Canada Research Chair on Atmospheric Icing Engineering of Power Networks (INGIVRE), Université du Québec à Chicoutimi, QC, Canada

Electric field distribution along an insulator surface is of prime importance for the long term performance of insulators. In this paper electric field and potential distribution along a standard 33 kV polymeric insulator were investigated under different pollution conditions. Effect of voltage type and polarity on the electric field and potential distribution under contaminated conditions were ...

Understanding Ferrofluid Spin-Up Flows in Rotating Uniform Magnetic Fields

S. Khushrushahi, and M. Zahn
Massachusetts Institute of Technology, Cambridge, MA, USA

A fully filled sphere of ferrofluid has constant demagnetizing factors in all three Cartesian directions such that when subjected to a uniform external rotating magnetic field the internal field is also uniform, and ultrasound measurements give no observable flow. Non-uniform magnetic fields or a non-uniform distribution of susceptibility are necessary conditions for ferrofluid spin-up flows in ...

Three-Dimensional Finite Element Modeling of Magnetic Flux Leakage Technique for Detection of Defects in Carbon Steel Plates

W.S. Singh, S. Thirunavukkarasu, S. Mahadevan, C. Mukhopadhyay, B.P.C. Rao, and T. Jayakumar
Non Destructive Evaluation Division, Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam Tamil Nadu, India

Three-dimensional finite element (FE) modeling of magnetic flux leakage (MFL) technique has been performed using COMSOL 3.4 for prediction of leakage fields from surface and sub-surface defects in a 12 mm thick carbon steel plate. The tangential and normal components of leakage fields have been predicted to study the influence of defect location and depth on the detectability of sub-surface ...