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.

Finite Element Modeling of Conventional and Pulsed Eddy Current Probes for CANDU® Fuel Channel Inspection - new

M. Luloff[1], J. Morelli[1], T. W. Krause[2]
[1]Department of Physics, Engineering Physics & Astronomy, Queen's University, Kingston, ON, Canada
[2]Department of Physics, Royal Military College of Canada, Kingston, ON, Canada

A pulsed Eddy Current (EC) probe, using the transient response to a stepped voltage is being developed for in-reactor inspection of CANDU® fuel channels. Pulsed EC has the advantage of generating a spectrum of discrete frequencies, allowing the simultaneous collection of data from a range of depths (i.e. takes advantage of multiple skin depths) that is unachievable by conventional EC, which ...

Using Multiphysics for Detecting Atmospheric Ice Through MuVi Graphene - Atmospheric Icing Sensor

U. N. Mughal [1],
[1] Narvik University College, Norway

This paper is a preliminary design study to develop a hybrid atmospheric icing sensor which have an adequate potential to detect an icing event, icing type and icing rate together with icing load. The physics to detect icing event and icing type have been numerically understood using Debye analytical model. Also the conductivity variations in the Debye model have been understood using modified ...

Calculating Impedance of a Common Mode Choke in High Frequency Regime

J. Lin [1],
[1] Pitotech Co. Ltd., Changhua City, Taiwan

Common mode chokes are good EMI filters in electronic power systems [1]. For such devices, values for their impedance are critical to their performances as noise filters. In this study, a two-step finite element approach is employed to study the impedance variations of a ferrite-core common mode choke operating at high frequencies (0.1 to 10 MHz) [2]. Extraction of inter-winding parasitic ...

Electromagnetic Characterization of Big Aperture Magnet Used in Particle Beam Cancer Treatment

J. Osorio Moreno[1], M. Pullia[1], C. Priano[1]
[1]Fondazione CNAO, Pavia, Italy

Resistive magnets are one of the principal components of ion medical accelerator systems used in heavy ion cancer treatment. To fulfill medical requirements, like the size of irradiation field and an uniform dose distribution, some magnets of the transport beam line may require large aperture and a large region where the magnetic field is within specifications (good field region). After a ...

Analysis of an Inductive Proximity Sensor

A. Frey [1], I. Kuehne [2], R. Großmann [1], T. Frommelt [1], L. Fromme [3], T. Koch [4],
[1] Augsburg University of Applied Sciences, Augsburg, Bavaria, Germany
[2] Heilbronn University, Heilbronn, Germany
[3] Bielefeld University of Applied Sciences, Bielefeld, Germany
[4] COMSOL Multiphysics GmbH, Göttingen, Germany

Today, 90 percent of automation sensors are binary proximity detectors. Besides capacitive and optical types, inductive proximity sensors are essential for industrial applications. Compared to their mechanical counterparts, they offer almost ideal properties as contact-free and wear-free working principle as well as high switching frequency and precision. Inductive sensors cover a detection ...

Computational Fluid Dynamics Approach to Evaluate Electrostatic Precipitator Performance

M. Ahmadi [1]
[1] Faculty of Engineering Technology, University of Twente, Enschede, The Netherlands

Electrostatic precipitation is an extremely efficient way of filtering fine particles from the airstream. Electrostatic precipitators (ESPs) can control airborne emission without significantly slowing down the rate of flow, because of the low pressure drop across this type of filters. A computational model was developed for the simulation of ESP operation and the parameters of interest were ...

Accuracy Assessment of The Linear Induction Motor Performance using Adaptive FEM

M. Manna[1], S. Marwaha[1], and C. Vasudeva[1]
[1] Department of Electrical & Instrumentation Engineering, Sant Longowal Institute of Engineering and Technology , Longowal (Deemed University), Punjab, India

The majority of electrical machines are designed to produce the rotary motion, there by exploiting the blessing of circularity which man has enjoyed since the discovery of the wheel. Electromagnetic forces may also be employed to produce the linear motion resulting in linear motion electrical machines. The performance of a high speed LIM is severely degraded by "End Effects". The paper ...

3D Electro-Thermal Study for Reliability of Automotive Power Vertical MOSFET Using COMSOL Multiphysics®

T. Azoui[1], S. Verde[1][2], J.B. Sauveplane[1], and P. Tounsi[1]
[1]LAAS-CNRS, Toulouse, France
[2]Department of Electronics and Telecommunications Engineering, University of Naples Federico II, Naples, Italy

In this paper 3D electro-thermal FE Model using COMSOL Multiphysics® software of power vertical MOSFET used in the automotive industry is presented. This model is used to analyze the effects of bonding wire lift off defect and to study the influence of metallization thickness and number of bonding wires on the electrical and thermal behavior of the power device. The maximum temperature ...

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 ...

On the Simulation of the Lightning Strikes to Complex Grounded Structures

M. Becerra
Royal Institute of Technology
School of Engineering
Electromagnetic Engineering Lab
Stockholm, Sweden

There is a considerable world-wide interest among lightning protection engineers and designers on the improvement of the standard procedures to assess the location of the most vulnerable places on complex structures to be struck by lightning flashes. This paper presents the implementation of the Self-consistent Lightning Interception Model in Matlab by using the COMSOL Multiphysics 3.5 ...