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.

Wavebased Micromotor for Plane Motions (3-DoF)

G. Jehle, D. Kern, and W. Seemann
Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany

This paper proposes the design of a 3-Degree of Freedom(DoF) motor based on surface acoustic waves in elastic solids. The rotor is propelled by wave fields, for linear and rotational motion respectively, in the stator, that can be steered by the driving signal of the piezoelectric actuators, which are placed on an elastic plate. The next considerations concern the feasibility of the proposed ...

Drying In Porous Media: Equilibrium And Non-Equilibrium Approaches For Composting Processes

A. Pujol[2], S. Pommier[3], G. Debenest[2], M. Quintard[2], and D. Chenu[1]
[1]Veolia Environnement, Limay, France
[2]IMFT, Toulouse, France
[3]INSA Toulouse, Toulouse, France

To understand origins and consequences of drying phenomenon during composting, a compositional drying model of a partially water-saturated porous media coupled with biodegradation has been developed. The different simulations carried out under COMSOL Multiphysics demonstrate the ability of the model to well describe the compositional drying of a partial water-saturated porous media and point out ...

3D Model for the Dynamic Simulation of SOFC Cathodes

A. Häffelin, J. Joos, M. Ender, A. Weber, and E. Ivers-Tiffée
Institut für Werkstoffe der Elektrotechnik (IWE)
Karlsruher Institut für Technologie (KIT)
Karlsruhe, Germany

A fuel cell is an electrochemical system, which converts chemical energy into electricity by a controlled reaction of hydrogen and oxygen. The performance of the electrode is likewise determined by its material and the microstructure. The simulations were performed directly on reconstructions of real electrodes, obtained from focused ion beam (FIB) tomography. A finite element method (FEM) ...

COMSOL Multiphysics Modelling for Measurement Device of Electrical Resistivity in Laboratory Test Cell

C. Rémi, M. Bergeron, and S. Moreau
Cemagref
Antony, France

Bioreactor landfill is based on a homogeneous distribution of the moisture content to increase waste biodegradation. Most of studies have shown that Electrical Resistivity Tomography (ERT) can be a suitable method to study water content variation (2D and 3D). ERT is influenced by many physical parameters and no single relationship with volumetric water content was yet established for Municipal ...

Non-Equilibrium Quantum Well Populations and Optical Characteristics of III-Nitride Lasers and Light-Emitting Diodes

M. Kisin, and H. El-Ghoroury
Ostendo Technologies, Inc.
Carlsbad, CA

COMSOL-based Ostendo’s Optoelectronic Device Modeling Software (ODMS) has been updated to include effects of non-equilibrium QW populations in semiconductor light-emitting and laser diodes. III-nitride light emitters with different levels of polarity have been compared as an illustrative example of ODMS performance. Modeling proved that high intra-QW recombination rates in III-nitride light ...

Multiphysics Modeling of Electro-Optic Devices

J. Toney
Srico, Inc.
Columbus, OH

Designers of electro-optic modulators and related devices often use separate tools to study the optical and electrical portions of the device. The flexibility of COMSOL Multiphysics makes it possible to construct unified models of EO phenomena including realistic waveguide profiles and anisotropic material properties. We demonstrate the use of the RF Module to compute both RF and optical ...

Accurate Parameters Extraction of Multiconductor Transmission Lines in Multilayer Dielectric Media

S. Musa[1], M. Sadiku[1], and O. Momoh[2]
[1]Roy G. Perry College of Engineering, Prairie View A&M University, Prairie View, TX
[2]Indiana University-Purdue University

Development of very high speed integrated circuits is currently of great interest for today\'s technologies. This paper presents the quasi-TEM approach for the accurate parameters extraction of multiconductor transmission lines interconnect in single, two, and three-layered dielectric regions using the finite element method (FEM). We illustrate that FEM is accurate and effective for modeling ...

Modeling of Galvanic Interactions between AA5083 and Steel under Atmospheric Condition

D. Mizuno, Y. Shi, and R. Kelly
University of Virginia
Charlottesville, VA

Aluminum alloys 5000 series are widely used within the cabins of ships. These aluminum alloys are often joined via steel bolts. There is thus a concern that galvanic interactions will exacerbate corrosion of the aluminum alloys. In this study, a model of the galvanic corrosion between aluminum alloy AA5083 and steel under atmospheric conditions was built. The Nernst-Plank equation and the ...

Design and Characterization of a MEMS Varactor

V. S. Nagaraja, N. Suma, and S. L. Pinjare
Nitte Meenakshi Institute of Technology

The tunable capacitor (variable capacitor) is one of the most important and components in filters, Phase shifters, VCO etc. A tunable capacitor can also be built using electro – thermal actuating mechanism. Compared to electro static, tunable capacitors actuated by thermal actuators have several advantages like lower driving voltages. The performance of thermal actuator becomes a key factor ...

Effect of Channel Width on Fuel Cell Performance Using 3D Modelling

R. Pushpangadan, S. S. Dimble, and S. P. Duttagupta
IIT Bombay
Mumbai
Maharasthra, India

A three Dimensional model of the PEM Fuel cell is implemented using COMSOL Multiphysics and the channel width is varied to study the performance.Effect of channel width on the performance of the cell is studied by varying the width of the channel and keeping channel width to rib ratio constant at 1. Rib width is the width of the GDL area which is not covered by the channel. All other parameters ...

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