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.

Dynamic Simulation of Magnetorheological Fluid Using COMSOL Multiphysics® Software

J. Thanikachalam[1], P. Nagaraj [1],
[1] Mepco Schlenk Engineering College, Sivakasi , India.

The present work deals with dynamic simulation of magnetic particles present in the carrier fluid when subjected to external magnetic field. Magneto rheological fluid comes under classification of smart materials, which contain pure CI iron particles, silicon oil as carrier fluid and additives. The yield stress of the magneto rheological fluid can be controlled by varying the external magnetic ...

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

E. Topal
Middle East Technical University
Ankara
Turkey

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 ...

Computational Study on Transcutaneous Frontal Nerve Stimulation: Simplification of Human Head Model

E. Salkim [1], A. N. Shiraz [1], A. Demosthenous [1],
[1] Electronic and Electrical Department, University College London, London, UK

I. INTRODUCTION Migraine is a neurological disorder which affects nearly 15% of the population and it has been estimated that the European Community spends about €27 billion in a year. Its symptoms may be categorized as attacks of often severe, throbbing head pain with sensory sensitivity of light and sound. It is mainly related to trigeminal nerve, the supraorbital nerve (SON) and ...

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 ...

Numerical Calculation of the Dynamic Behavior of Asynchronous Motors with COMSOL Multiphysics

J. Güdelhöfer[1], R. Gottkehaskamp[1], A. Hartmann[1]
[1]Department of Electrical Machines and Electromagnetic Field Theory, University of Applied Sciences Düsseldorf, Düsseldorf, Germany

This paper shows how a time-dependent and non-linear simulation of the dynamic operation behavior of an induction machine is executed by means of the \"Rotating Machinery\" interface from COMSOL Multiphysics 4.2a. The two-dimensional FEM model is connected to electrical circuits by coupling the physics \"Rotating Machinery\" and \"Electrical Circuit\" interfaces. These circuits include 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 ...

Simulation of Normal and Cancerous T-cell Membrane Electroporation - new

O. Henao[1], V. Gómez[1], I. De la Pava[1], J. Sánchez[1]
[1]Grupo Fisiología Celular y Aplicada, Universidad Tecnológica de Pereira, Pereira, Risaralda, Colombia

Electroporation is an increase of the cell membrane permeability due to the formation of aqueous pores in it when the cell is under the influence of an intense electric field [1][2]. The formation of such pores in the membrane can be used to enhance the uptake of chemotherapeutic drugs into the cell in a cancer treatment known as electrochemotherapy [3]. In some cases the direct experimental ...

Contactless Power and Data Transfer for Multiple Nonlinear Loads

H.P. Schmidt [1], U. Vogl[1]
[1]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 ...

Finite Element Analysis of Superconductive Tape by Using T-Ω Formulation

H. Arab[1], S. Memiaghe[1], C. Akyel[1]
[1]Ecole Polytechnique of Montreal, Montreal, QC, Canada

This paper deals with a numerical modelling technique based on finite elements method for computing magnetic field and current density distributions in high temperature Superconducting (HTS) tapes. The model is developed using the T-ῼ formulation for which the degree of freedom (DOF) and the CPU time decreased considerably in AC losses analysis, and it is also observe that T-ῼ formulation give ...

Nonlinear Shielded Multipair Twisted Railway Cable Modeling with COMSOL Multiphysics®

Y. Jin [1], G. Papaiz Garbini [1], S. Karoui [1], M. Cucchiaro [1],
[1] SNCF Réseau, Paris, France

Signaling and telecommunication cables are shielded multipair twisted cables that lie along the railway and transfer railway information at low frequency (some kilohertz). Due to the electromagnetic disturbance of the railway environment, coming from high voltage conductors such as the overhead line and the electric energy transmission lines parallel to the railway those cables can be subjected ...