Technical Papers and Presentations

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.

Simulation of a Diesel Oxidation Catalyst Used in a NOx Storage and Reduction system for Heavy Duty Trucks

C. Odenbrand, and E. Senar Serra
Department of Chemical Engineering, Lund University, Lund, Sweden

This work concerns the performance of an oxidation catalyst used in a NOx storage and reduction system. The oxidation of NO is the main objective of this study, where the presence of CO and propene has also been taken into account. Experimental data has been determined on a monolithic oxidation catalyst mounted after a heavy duty diesel engine in a rig. The conversion of hydrocarbons is predicted ...

Image Based-Mesh Generation for Realistic Simulation of theTranscranial Current Stimulation

R. Said[1], R. Cotton[1], P. Young[1], A. Datta[2], M. Elwassif[2] , and M. Bikson[2]
[1] Simpleware Ltd, Exeter, Devon, UK
[2] Department of Biomedical Eng., The City College of New York, New York, NY, USA

This paper will discuss the comprehensive solution adopted for converting the 3D digital/medical images directly into the computational model. The workflow using Simpleware Software – ScanIP and + ScanFE – will be illustrated including the option for directly exporting fully compatible models to COMSOL Multiphysics. The extra functionality that allows introduction, positioning and ...

Validation of the Acoustic Finite Element Model of a Very Light Jet Cavity Mock-up

F. Teuma Tsafack, K. Kochan, T. Kletschkowski, and D. Sachau
Helmut Schmidt University/ University of the Federal Armed Forces Hamburg, Germany

This paper presents an important step in developing a combined active noise- and audio system for a light jet. To prepare its installation both a wooden mock-up and a finite element model of the investigated cavity were created. Sensitivity analysis and key parameters selection were done in order to validate the model. Error analysis between measured and computed data closes the ...

COMSOL Multiphysics Modeling of a 20-W Microwave Electrothermal Thruster

E. Gao, and S. Bilen
The Pennsylvania State University, University Park, PA, USA

The Microwave Electrothermal Thruster (MET) is a space electric propulsion device that uses an electromagnetic resonant cavity within which a free-floating plasma is ignited and sustained, heating a propellant gas that is that exhausted out of a gas-dynamic nozzle. For an empty cavity it is fairly straightforward to accurately calculate the cavity’s resonant frequency and describe the ...

Modeling of the Transport Phenomena in Lithium-Ion Battery Electrolytes

A. Nyman, M. Behm, and G. Lindbergh
Applied Electrochemistry, School of Chemical Science and Engineering, Royal Institute of Technology Stockholm, Sweden

Modeling of mass transport is an important step in evaluating lithium-ion battery electrolytes and understanding cell performance. For high-power applications, concentration gradients in the electrolyte lead to limiting currents, which limit the power-density of the battery. The model has been used for determining a complete set of transport and thermodynamic properties for LiPF6 dissolved in an ...

Strong Magnetic Field and Its Application

Y. Song
Huazhong University of Science and Technology, Wuhan, China

High magnetic field research has yielded fruitful results. Since 1913, associated with the magnetic field there are 19 Nobel Prizes, including a prize for medicine, five chemistry prizes, and 13 physics prizes. In recent years, the international community under the conditions of strong magnetic field is very active in scientific research, involving many disciplines such as physics, chemistry, ...

Simulation of MEA in PEMFC and Interface of Nanometer-Sized Electrodes

Q. Zhang, Y. Liu, and S. Chen
Wuhan University, College of Chemistry and Molecular Science, Wuhan, China

COMSOL Multiphysics is a very helpful simulation software in our researches on both PEMFC and nanometer-sized electrodes. In the first part of our presentation, the influence of humidity and temperature to the performance of PEMFC are studied by simulating the MEA (membrane electrode assembly) in PEMFC. In the second part, models of different nanometer-sized electrodes, including spherical ...

Magnetoacoustic Tomography and COMSOL Multiphysics

W. He
Chinese Academy of Sciences, Institute of Electrical Engineering, Beijing, China

Magnetoacoustic tomography with magnetic induction (MAT-MI) is a recently introduced method for imaging electrical impedance properties, which integrates classic electrical impedance tomography and ultrasonic technique. It could provide an explicitly reconstructed electrical impedance distribution with high spatial resolution and contrast, eliminating the shielding effects of insulating tissues. ...

Blistering of Industrial Floors on Concrete Substrate: The Role of Air Overpressure

P. Devillers[1], S.V. Aher[2], G. Fau[3], B. Tranain[3], and C. Buisson[1]
[1]Centre des Matériaux de Grande Diffusion, Ecole des Mines d’Alès, France
[2]Department of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
[3]Centre Scientifique et Technique du Bâtiment, Champs sur Marne, France

A three dimensional COMSOL Multiphysics, transient analysis, diffusion model has been adopted to model the transfers of water in the industrial concrete floors. To take into account the different initial saturation levels at the different levels of the slab, the model is divided into three subdomains. The rise of the waterfront is also simulated and the air overpressure thereby developed at the ...

Beam Structure As an Acoustic Wave Sensor: A Study of the Effect of Sensor Design on Its Sensitivity to Noise

F. Akasheh[1], A. Biddle[1], W.S. Shepard Jr.[2], and B.B.B. Zhang[2]
[1]Tuskegee University, Tuskegee, AL, USA
[2]University of Alabama, Tuscaloosa, AL, USA

The detection and identification of the location of a sound source is commonly done using arrays of microphones. A recent new alternative approach has been proposed which involves the use of continuous structures, such as beams or plates, as acoustic wave sensors. The sound wave impinging on the surface of the structure causes it to vibrate and the measured surface displacements can then be used ...

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