Ici vous trouverez les présentations issues des Conférences COMSOL à travers le monde. Réalisées par des utilisateurs de COMSOL Multiphysics, ces présentations explorent tous les domaines actuels d'innovation. Les applications couvrent pratiquement tous les secteurs industriels et impliquent des phénomènes électriques, mécaniques, fluidiques et chimiques. Utilisez la recherche rapide pour trouver les présentations les plus intéressantes dans votre domaine d'intérêt.

Numerical Quasi Stationary and Transient Analysis of Annular Linear Electromagnetic Induction Pump

L. Goldsteins[1], L. Buligins[2], Y. Fautrelle[3], C. Biscarrat[1], S. Vitry[1]
[1]CEA Cadarache, Saint Paul lez Durance, France
[2]University of Latvia, Riga, Latvia
[3]Grenoble Institute of Technology, Grenoble, France

In this paper an axisymmetric model of annular linear electromagnetic induction pumps using numerical methods and four approaches (two transient and two quasi-stationary) with different complexity is studied. Comparison of integral characteristics is performed between numerical approaches and also with analytic estimations. Distributions of physical parameters over length and height of channel ...

Muscle-Electrode Interface Simulation

A. Altamirano, C. Toledo, A. Vera, R. Muñoz, and L. Leija
Centro de Investigacion y Estudios Avanzados
Instituto Politecnico Nacional

In this article, the aim is to study different types and forms of electromyography (EMG) electrodes, for bipolar configuration, and the electric interface with muscle phantom. COMSOL Multiphysics allows modeling shapes and contact surfaces. Surface and needle electrodes will be modeled. A number of different trials and combinations will be presented; exploring different geometric shapes and ...

Using the Electrical Field Analysis for Assessment of the Influence of Paper Insulation on Discharge Initiation in Oil

P. Rozga[1], D. Hantsz[1]
[1]Technical University of Lodz, Lodz, Poland

Conclusions about the influence of paper insulation on the electrical discharge initiation in mineral oil may be drawn on the basis of experimental studies. However, in some cases, these conclusions may be supported by electrical field analysis. Determination of maximum values of electrical field stress in the vicinity of model electrode setups may bring a new information about initiation ...

Evaluation Of AC Loss And Temperature Distribution In High Temperature Superconducting Tape Using COMSOL Multiphysics

G. Konar, and N. Charaborty
Jadavpur University, Kolkata, West Bengal, India

High temperature superconductors (HTS) are promising candidates for electrical power applications. However, the superconductors exhibits energy loss known as AC loss when exposed to time varying external magnetic field and/or transport current. In this paper, AC loss in an elliptical Ag sheathed Bi2223 (HTS) tape is calculated using the time dependent PDE mode of COMSOL Multiphysics. The HTS ...

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 ...

Optoelectronic Transducer with an Optical Fiber Transmission Used for Current Measurement

J. Golebiowski [1],
[1] Dept. of Semiconductor and Optoelectronics Devices, Lodz University of Technology, Lodz, Poland

The transducer's construction used for current measurement in medium voltage power lines for current values kA is shown. The transducer involves magnetic circuit with a gap in which a MEMS structure with a movable cantilever is placed. The beam is made of silicon with a NiFe layer. The beam with the ferromagnetic layer is deflected due to effecting magnetic field. The deflection of the beam is ...

Simulation of the Earth's Electromagnetic Clearance System (DEMETER)

J. P. Pothin [1], N. Gosselin [1],
[1] Nexter Systems, France

DEMETER is a magnetic field replicator. This system is designed to deceive anti tank mines. Numerical simulation (using COMSOL Multiphysics® software) allows to indicate DEMETER's performance in various environment and various configurations. The study of the magnetic field provide also an overview of mine-clearing tools disturbances on the field generated by DEMETER.

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 ...

Electrophoretic Focusing and Navigation for Intranasal Target Drug Delivery

X. Si[1]
[1]Calvin College, Grand Rapids, MI, USA

Direct nose-to-brain drug delivery circumvents the blood-brain-barrier and has multiple advantages over intravenous delivery. However, its application is limited by the extremely low delivery efficiency to the olfactory region. This study evaluated the feasibility of targeted drug delivery with electrophoretic forces in a 2D human nose model. COMSOL Multiphysics® AC/DC, CFD, and Particle Tracing ...

Numerical Simulation of Chamber Design for Pulsed Electric Fields Processing of Wet Olive Pomace - new

N. Varga[1], I. Perales[2], A. Portugal[2]
[1]ATEKNEA Solutions Hungary, Budapest, Hungary
[2]ATEKNEA Solutions Catalonia, Barcelona, Spain

The application of pulsed electric fields (PEF) is well known in the food industry as an advanced technology for mass transfer improvement. A new potential adaptation area of PEF could be extracting a valuable antioxidant called polyphenol from wet olive pomace (WOP) which is a by-product of olive oil production. The modelling includes the PEF effects on the WOP which is flowing through a ...