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.

Improvement of the Reflective Characteristic of the Microwave Ion Source Chamber with COMSOL®

[1]Hirohiko MURATA

Sumitomo Heavy Industries, Ltd., Shinagawa, Tokyo, Japan[1]

We, Sumitomo Heavy Industries, Ltd. have been developing a microwave ion source since 2011. The design of the chamber is important to generate plasma efficiently. The plasma chamber was designed with the COMSOL Multiphysics RF module, and reported the results at this conference last year. In order to improve the reflective characteristic further, we redesigned the plasma chamber with the RF ...

Multiphysics Model for Breakup of Charged Liquid Droplets in Electric Fields

S. Chaudhuri [1], W. Du [1],
[1] University of Illinois at Urbana-Champaign, Champaign, IL, USA

Predicting and controlling the formation of droplets from a liquid jet is a critical problem in a variety of applications ranging from fuel injection to paint sprays. It is known that liquid droplets subjected to an electric field acquire a net electrostatic charge via induction, and that the magnitude of this charge depends on the conductivity of the liquid and the size of the droplet [1]. When ...

Marine Vibrator Bubble Source Simulation and Testing

A. K. Morozov [1],
[1] Teledyne Marine Systems, North Falmouth, MA, USA

Marine Vibrators are a coherent type of sound source, which can be quieter and less harmful for marine habitants than traditional air-gun technology. Such source gives clearer, more precise and higher resolution imaging of the bottom properties due to the coherent signal and streamer array processing. Teledyne Marine Systems is developing a coherent seismic marine sound source technology ...

Thermal-Optical Modeling of a Signal Enhancement Approach for Paper-Based Diagnostics

D. Gasperino [1]
[1] Intellectual Ventures Laboratory, Bellevue, WA, USA

INTRODUCTION: Point of care diagnostics aimed at low-resource settings need to be relatively simple, robust and low-cost. The most commonly-used diagnostic platform in these settings is the lateral flow assay (LFA). LFAs are paper-based immunoassays designed to perform on-strip binding with analytes in patient samples in order to generate a visual signal if disease-specific antigen is ...

Performance Prediction of Eddy Current Flowmeter for Sodium

P. Sharma[1], S. K. Dash[1], B. K. Nashine[1], S. S. Kumar[1], R. Veerasamy[1], B. Krishnakumar[1], P. Kalyanasundaram[1], and G. Vaidyanathan[1]
[1] Fast Reactor Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu

Sodium is used as a coolant in Fast Breeder Reactors. Eddy Current Flowmeter (ECFM) is used for measurement of sodium flow in the primary pump and at the outlet of the subassemblies. Eddy Current Flowmeter (ECFM) works on the principle of change in the magnetic field profile due to induced eddy currents as a result of sodium flow. It consists of a central primary winding, energized from an A.C. ...

FEM Study on Contactless Excitation of Acoustic Waves in SAWDevices

A. K. Namdeo[1], N. Ramakrishna[2], H. B. Nemade[1,2], and R. P. Palathinkal[1]

[1] Department of Electronics and Communication Engineering, Indian Institute of Technology Guwahati, Assam, India
[2] Centre for Nanotechnology. Indian Institute of Technology Guwahati, Assam, India

In this paper a finite element method(FEM) study of a surface acoustic wave (SAW)device excited by electrostatic coupling method is performed by using COMSOL Multiphysics. We have modeled a Rayleigh wave type SAW device by choosing YZ Lithium niobate as the substrate. The effect of external radio frequency (RF) field to the SAW device is analyzed. The effect of distance between the contactless ...

COMSOL Multiphysics® Version 4

Svante Littmarck
President and CEO, COMSOL

Svante Littmarck is the CEO of the COMSOL group. He co-founded COMSOL in 1986. He holds a M.Sc. in Applied Mathematics from the Royal Institute of Technology in Stockholm. In 2004 he received an honorary doctoral degree from the Royal Institute of Technology.

High Temperature Process Simulation: An Example in Crystal Growth

H. Rouch[1] and O. Geoffroy[1]
[1]INOPRO, Villard de Lans, France

High temperature processes are used in a large variety of industrial application. Simulation helps to solve technological problems and increase energy efficiency in case of industrial scale simulation. We present in this paper a research equipment simulation. The aim is to increase knowledge of temperature field in the crystal growth region in order to give researcher some important information ...

Use of COMSOL as an Educational Tool Through its Application to Ground Water Pollution

A. Modaressi-Farahmand-Razavi[1]
[1]MSS-Mat Laboratory, CNRS, Ecole Centrale Paris, Châtenay Malabry, France

Ensuring the quality of underground water and controlling its quantity is of major concern for the population. Therefore, this subject attracts many students from different specialties at different levels of their curriculum. In fact, the pedagogic objectives of the course may be different according to the level or/and interest of the students and COMSOL is used due to its versatility. In this ...

COMSOL Derived Universal Scaling Model For Low Reynolds Number Viscous Flow Through Microfabricated Pillars – Applications to Heat Pipe Technology

N. Srivastava[1], and C.D. Meinhart[1]
[1]Department of Mechanical Engineering, University of California Santa Barbara, Santa Barbara California, USA

Cooling of high-power density electronic devices remains a challenge. Microfluidic heat-pipes with the potential of achieving ultra-high thermal conductivities offer a low-cost technology for cooling electronics. To achieve high thermal conductivity, it is critical to maximize the rate of liquid transport inside the heat pipe. We propose a novel array of microfabricated pillars to maximize ...

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