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.

Magnetic Liquids for Lab-on-a-chip and Rapid Diagnostics Applications

H. Köser
Yale University

In this presentation we outline our recent work on Magnetic Liquids, and the great number of application areas these are used. Ferrofluids are nanometer sized magnetic particles, covered by a surfactant, suspended in a carrier medium compatible with the surfactant material. Ferrofluids are applicable to a great and ever increasing number of application areas, such as: • Liquid Seals and ...

Inverse Methods in Engineering Modelling

William B.J. Zimmerman
University of Sheffield
Sheffield, UK

"All models are inverse problems". This presentation gives some clues to how COMSOL Multiphysics, and its integration with MATLAB, can run models 'backwards'. A number of examples are shown to exemplify the collaboration between modeling, calibration and interpolation. --------------------------------- Keynote speaker's biography: Professor WBJ Zimmerman BScEng (Princeton), MSc PhD ...

Mathematical Modeling of Autoregulation using Finite-Element Method

Aleksandar Jeremic
Assistant Professor
Department of Electrical and Computer Engineering
McMaster University
Hamilton, Canada

In this presentation, cerebral blood flow (CBF) is modeled using a mathematical model, a statistical model and numerical examples. In the mathematical model, blood flow is described using Navier-Stokes equations. In the statistical model, the experiments or the data measurement process is simulated and to study how the noise in the measurements affects the ability to estimate the parameters, ...

Numerical Simulation of Diffusion-Ventilation Model for Gas Mitigation in Goaf

Yang Tianhong
College of Chemistry and Molecular Sciences
Wuhan University
Wuhan, China

This presentation is written in Chinese. --------------------------------- Keynote speaker's biography: Yang Tianhong received his M Sc. from the China Coal Research Institute in 1998 and his Ph.D from Northeastern University, China in 2001. After a stint as a Visiting Professor at the Hong Kong University, Yang Tianhong is presently a Visiting Professor at the University of Western Australia.

Modeling Flow Through Foam Channels

F. Rouyer, E. Lorenceau, and O. Pitois
Laboratoire de Physique des Matériaux Divisés et des Interfaces, Université Paris-est, Paris, France

We model the liquid transport in foam (i.e. drainage) by unidirectional flow transverse to a triangular planar area that represents channel (i.e. Plateau borders) cross-sections. Partial mobility of the interfaces is obtained balancing the bulk viscous stress with the surface viscous stress and a velocity equal to zero is imposed at the vertices. In liquid foams, the wedges of the channels are ...

Transport in reactive porous media containing biofilms

G. Debenest, Y. Aspa, and M. Quintard
IMFT, GEMP group, Toulouse, France

The objective of this presentation is the evaluation of effective bulk transport properties of reactive porous biofilm. We present our microscale model that accounts for both momentum and mass balances.

Heat Transfer Effects in a Water Calorimeter for Measuring the Absorbed Dose of Therapy-Level Radiation Beams

R. E. Tosh, and H. H. Chen-Mayer
National Institute of Standards and Technology, Gaithersburg, MD, USA

Water calorimetry that directly measures the temperature rise (at the mK level) due to radiation heating is used as a primary standard for therapy-level gamma-radiation beams. The temperature rise is measured at a given point in space where the spatial distribution of the absorbed dose is non-uniform, and therefore is subject to heat conduction and convection distortions that must be corrected to ...

Blending Classical and Practical Instruction in Structural Mechanics Using COMSOL

P. Venkataraman
Dept. of Mechanical Engineering, Rochester Institute of Technology, Rochester, NY, USA

COMSOL was used for the first time in the spring of 2007 in the course "Aerostructures" in the department of Mechanical Engineering at the Rochester Institute of Technology. The course is targeted at junior/senior students in the aerospace option of the undergraduate mechanical engineering program. The course content is typical of an advanced mechanics of materials course and it was possible to ...

Mathematical Modeling of Atheroma Plaque Deformation using COMSOL Multiphysics

N. El Khatib1, S. Genieys1, M. Zine2, and V. Volpert1
1Institut Camille Jordan, Université Claude Bernard, Lyon, France
2Département Maths & Informatique, Ecole Centrale de Lyon, Lyon, France

The development of atherosclerosis leads to the formation of an atheroma plaque which takes place in the artery. This plaque is composed of two parts: a lipid deposit and a fibrous cap. The fibrous cap covers the lipid deposit and isolates it from the blood flow. The blood flow that circulates in the artery modifies the geometry of the atheroma plaque and can cause dangerous effects, such as a ...

Design and Modeling of a Micro-active Suspension

T. Verdot, and M. Collet
Dept. of Applied Mechanics, FEMTO-ST Institute, Besançon, France

Nowadays, lightweight materials are widely used to reduce weight and increase available space in moving structures such as cars or aircraft. However, they constitute an intense vibrating environment that can strongly affect the operation of embedded micro-transducers such as frequency generators or inertial sensors. To alleviate this problem, we propose the concept of a Micro-Active Suspension ...

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