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.

Simulating Superconductors in AC Environment: Two Complemetary COMSOL Models

R. Brambilla[1] and F. Grilli[2]
[1]ENEA - Ricerca sul Sistema Elettrico S.p.A., Milano, Italy
[2]Karlsruhe Institute of Technology, Karlsruhe, Germany

In this paper we present a summary of our work on numerical modeling of superconductors with COMSOL Multiphysics®. We discuss the two models we utilized for this purpose: a 2-D model based on solving Maxwell equations and a 1-D model for thin conductors based on solving the integral equation for the current density distribution. The latter is useful for modeling second generation High ...

Finite Element Model of a Magnet Driven Reed Switch

B. LaBarge[1], and E. Gutierrez-Miravete[2]

[1]Gems Sensors and Controls, Plainville, CT, USA
[2]Rensselaer at Hartford, Hartford, CT, USA

A simple proximity sensing circuit is made using magnets actuating reed switches; these switches are wired into a larger circuit that performs auxiliary functions. The success or failure of such systems is a function of their position. A simulation using COMSOL Multiphysics is conducted to study the position of a reed switch relative to a magnet when the switch opens and closes. Ability to ...

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 ...

Using COMSOL Multiphysics for Designing a Hybrid Electromagnetic Launcher

R. Kroczek, and J. Domin
Silesian University of Technology, Gliwice, Poland

This paper describes consecutive stages of design and construction of electromagnetic gun manufactured at the Silesian University of Technology. It gives insight into current knowledge about such a launcher. The computer model was elaborated in COMSOL Multiphysics version 3.5. The numerical analysis was carried out a 3-dimensional space. The physical model was build up and comparison of the ...

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 ...

Analysis of Dielectrophoretic Force by Using COMSOL

Taewoo Lee[1]
[1]Department of Biomedical Engineering, Yonsei University, Seoul, South Korea

Dielectrophoresis is a phenomenon in which a force is exerted on a dielectric particle when it is subjected to a non-uniform electric field. In this research, we analyze dielectrophoretic (DEP) force using a geometry containing two electrodes, one with SiO2 and one without, with a gap between them. The relevant governing equations include the DEP force, the electrohydrodynamic and corresponding ...


张春 [1], 朱铧丞 [1], Ashim Datta [1],
[1] 四川大学,成都,四川,中国

引言:微波干燥过程涉及多物理场的耦合,物理过程十分复杂。不仅有被加热物质的形态改变,还有气态、液态和固态三相的相互作用。为了更清楚地理解微波干燥过程,本模型将电磁场、多相流和物理变形用相应的方程耦合到一起建模分析,并用相应的物理参数表征微波干燥过程。(图1) COMSOL Multiphysics® 的使用:借鉴微波加热接口土豆模型,添加气体和固体传热接口以及自定义方程,用方程和参数实现多物理场耦合。实验模型中,干燥物为土豆,且被视为多孔弹性介质。物质变形用相应的矩阵来表征。 结果:在仿真结果的基础上,利用家用微波炉干燥土豆,设计实验,并测量了微波干燥过程中的重要物理参数,如温度、水分和形变。(图2,图3) 结论:该仿真模型和实验基本吻合 ...

A Model for High Temperature Inductive Heating

S.A. Halvorsen[1]
[1]Teknova AS, Kristiansand, Norway

COMSOL Multiphysics has been applied to develop a model for inductive heating. A coarse, lumped model of the interior of a high temperature reactor is coupled to finite element models for the electromagnetic field, the temperature distribution outside the reactor, and mechanical stresses in the crucible. The model can be applied to study operational conditions, thermal stresses, or design ...

Magnetic Stimulation of the Human Brain with Low-Intensity Field

D. Lazutkin[1], A. Harkara[2], and P. Husar[1]
[1]Ilmenau University of Technology, Ilmenau, Thuringia, Germany
[2]Simpleware Limited, Exeter, Devon, United Kingdom

The most popular means of depression treatment are psychotherapy, antidepressant medication and recently adopted transcranial magnetic stimulation (TMS) of the human brain. To overcome their disadvantages we are investigating an application of low-field magnetic stimulation (LFMS) to depression treatment. The 3D electromagnetic model of LFMS has been developed. It employs 8 small coils disposed ...

Coupled Electromagnetic - Dynamic FEM Simulation of A High Frequency MEMS Energy Harvester

E. Topal
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 ...