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Voyez comment la modélisation et la simulation sont utilisées par les industries La modélisation et la simulation multiphysiques pilotent l'innovation dans tous les grands secteurs d'activité et dans le monde universitaire — comme en témoignent les nombreuses utilisations présentées dans des articles et des posters techniques présentés par des ingénieurs, chercheurs et scientifiques à la Conférence COMSOL chaque année. Inspirez-vous des récents proceedings réunis ci-dessous, ou, pour trouver les présentations les plus intéressantes dans votre domaine d'intérêt, utilisez la recherche rapide.

Consultez les proceedings de la Conference COMSOL 2024

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Acoustic Upside-Down Levitator with a Solid Sample

L. Holitzner [1], E. G. Lierke [2],
[1] Paul Scherrer Institut (PSI), Villigen PSI, Switzerland
[2] tec5 AG, Oberursel, Germany

Introduction: Acoustic levitators are used to levitate small samples (ca. 0.01 - 6 mm) at a stable position in a gas or liquid environment. Acoustic levitators were first developed und used for experiments in space (1970s, by NASA / ESA), the application later became terrestrial (1990s). ... En savoir plus

Study of Rotation of Ellipsoidal Particles in Combined Simple Shear Flow and Magnetic Fields

C. Wang [1], J. Zhang [1],
[1] Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology, Rolla, MO, USA

This study creates a 2D fluid-structure interaction (FSI) model to study the effect of magnetic field and particle aspect ratio on the period of rotation and symmetry of ellipsoidal paramagnetic particles. The results show that the magnetic field strength has a significant effect on the ... En savoir plus

Impact of Frictional Heat Generation upon Temperature of Sesame Paste Flow through Screw-expeller

Rajaratnam Shanthini¹, S.A.V. Kumar ², S.M.D.T. Sandaruwan¹
¹University of Peradeniya, Peradeniya, Sri Lanka
²Texlan Center (Pvt) Ltd, Minuwangoda, Sri Lanka

Temperature of sesame paste flowing through a screw-expeller was studied. Screw-expeller used consisted of a rotating tapered screw and a constant-inner-diameter stationary barrel. Since screw diameter was much larger than the sesame paste thickness, an unwrapped model was employed with ... En savoir plus

Relativistic Quantum Mechanical Wave Functions for Fermion Particles in Electric or Magnetic Fields

A. J. Kalinowski [1],
[1] Consultant / East Lyme, CT, USA

INTRODUCTION: The Dirac equation is employed in particle physics and historically gave the first combined unification of quantum mechanics and relativity theory by introducing a four component wave function Ψi. This wave function described the behavior of fermion type particles (e.g. ... En savoir plus

Simulation of Flow in a Rectangular Channel of a PEM Fuel Cell

A. L. R. Paulino [1], E. Robalinho [2], E. F. Cunha [1], M. Linardi [1], R. R. Passos [3], E. I. Santiago [1]
[1] Instituto de Pesquisas Energéticas e Nucleares – IPEN/CNEN, São Paulo, SP, Brazil
[2] Instituto de Pesquisas Energéticas e Nucleares – IPEN/CNEN, São Paulo, SP, Brazil; and Instituto Federal do Rio Grande do Sul – IFRS, Porto Alegre, RS, Brazil
[3] Universidade Federal do Amazonas – UFAM, Manaus, AM, Brazil

The performance of a PEMFC depends on several factors, including the flow inside gas channels. Low gas velocity inside the channel can make water management more difficult, possibly causing water to accumulate and condense in certain regions of the cell. In the present work, COMSOL ... En savoir plus

Sound Attenuation by Hearing Aid Earmold Tubing

M. Herring Jensen
Widex A/S, Vaerloese, Denmark

In this study we model the sound attenuation properties of a hearing aid earmold tube. The model includes thermoviscous acoustic effects and it couples structural vibrations to the external acoustic field. Moreover, the finite element domain is coupled at two boundaries with an ... En savoir plus

The Effect of Eccentricity in Fully Developed Annular Pipe Flow on Convection Heat Transfer and the Darcy Friction Factor

S. Rabbani [1], A. Elzawawy [1], J. D'Arrigo [1], J. D. Freels [2]
[1] Vaughn College of Aeronautics and Technology, New York, NY, USA
[2] Oak Ridge National Laboratory, Oak Ridge, TN, USA

Eccentricity in annular channels contributes to changes in fluid flow characteristics which in turn, affects the performance and integrity of the configuration. This research investigates a model of an annular channel with a diameter ratio of 0.762, an aspect ratio of 68.9:1 and heating ... En savoir plus

The Effect of Aluminum Content on Convective Flow of Molten Metal Generated by Arc Plasma

Y. T. Cho [1], C. K. Kim [1], H. U. Hong [1],
[1] Changwon National University, Changwon, Gyeongsangnam-do, South Korea

Arc plasma can heat and melt the metal material and flows of molten metal can be affected by several forces such as Lorentz force which is ruled by current, Marangoni force controlled by surface tension, buoyancy force, and arc drag force. Usually, surface tension variation is determined ... En savoir plus

Numerical Optimization Strategy for Determining 3D Flow Fields in Microfluidics

A. Eden [1], M. Sigurdson [1], C. D. Meinhart [1], I. Mezic [1],
[1] University of California - Santa Barbara, Santa Barbara, CA, USA

Measurement of three dimensional, three component velocity fields is central to the development of effective micromixers for bioassays and lab-on-chip mixing applications. We present a hybrid experimental-numerical method for the generation of 3D flow information from 2D particle image ... En savoir plus

Motion of Uncharged Particles in Electroosmotic Flow through a Wavy Cylindrical Channel

N. Qudus[1], T. Mahbub[1], S. A. Ali[1], and M. Shajahan[1]
[1] Bangladesh University of Engineering and Technology, Dhaka Bangladesh

A finite element model is employed to describe the electric potential distribution and electroosmotic flow field inside a wavy cylindrical channel. The model uses coupled Laplace and Poisson-Boltzmann to evaluate the electric potential distribution inside the channel. It also contains ... En savoir plus

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