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.

Dimensioning simultaneous polymerase chain reactions (PCR) in capillary tubes

Berthier, J., Chatelain, F.
CEA/LETI

Polymerase chain reaction is the most usual way to amplify DNA strands for detection and biorecognition. However efficient biorecognition requires to perform many different PCRs at the same time. We present here a new concept of simultaneous PCRs in capillary tubes and more specifically the dimensioning of such a microsystem. The concept consists in performing different PCRs in annular rings ...

The influence of air humidity on the interaction between VOC and construction materials

Radulescu, C., Chicina, A.
LEPTAB

The subject of our study belongs to the large area of studies about the analyze and the prediction of indoor air quality. One of the actual weaknesses for the appreciations of air indoor quality is the lack off knowledge about the interactions between the pollutants and the materials (emission off VOC, adsorption). Knowing the behavior of construction materials we can figure out the possibility ...

FEMLAB analysis of open aluminium foam in compression

Nygaard, J.V.
Interdisciplinary Nanoscience Center (iNANO) Aarhus University, The Faculty of Science, Ny Munkegade, Aarhus C, Denmark.

The analysis of the mechanical properties of bi-continuous structures has been problematic due to the complex geometry that describes these materials. In this study a method which identifies and quantifies the geometrical elements within the structure will be presented. A sample is in-situ compressed and its deformation is compared with the results of a FEMLAB finite element model. Initially, ...

Implementation of a multi-axial pseudoelastic model in FEMLAB to predict dynamical behavior of shape memory alloys

Thiebaud, F., Collet, M., Foltete, E., Lexcellent C.
Institut FEMTO ST, UMR CNRS 6174, département LMARC

We present here how we have implemented the « RL model » ([RLT92]) in the multiphysic software FEMLAB. Beam in traction, a plate in pure shear, in proportional bitraction have been modelling. These studies will allow building some non linear "super-element" able to design composite structure, for dynamical studies with the built-in MATLAB interface.

A microfluidic assay design for real-time bacterial chemotaxis studies

Koser, H., Kaya, T., Mao, L.
Department of Electrical Engineering, Yale University, New Haven, CT

We have developed a novel, multilayered microfluidic chamber that enables the realtime quantitative study of chemotaxis on virtually all types of motile cells. In this paper, we present a FEMLAB modeling study of the 3D chamber design, including a consideration of each device iteration that successively led to the eventual design. The final chamber design is able to create and maintain an ...

Computations of the earth’s and other solar planets’ magnetic moments with the aid of a FEMLAB electromagnetic module

Wada, J.Y.
Retired, Hughes Space & Communications Co. (Now Boeing Co.)

Computations have been performed of Earth’s and other solar planets’ magnetic moments with the aid of a FEMLAB Electromagnetic Module. The FEMLAB library has a specific program that calculates magnetic field strength and distribution resulting from a circular current source. This program has been adapted with 38 concentric loops to simulate the conductive currents circulating within the ...

Modelling of Magnetic Resonance Sounding using Finite Elements (FEMLAB) for 2D Resistivity Extension

Braun, M., Rommel, I., Yaramanci, U.
Technische Universität Berlin, FG Angewandte Geophysik, Berlin

We show modellings of magnetic resonance sounding (MRS) data influenced by 2D electrical resistivity structures. We demonstrate exemplarily the impact of a 2D electrical resistivity distribution for a discontinued layer as geological situation. The effects are shown for 2D kernel functions and for calibration sounding curves. We compare the results considering a 2D structure with those of 1D ...

Using Advanced FEMLAB Features for SHA-FEM Coupling

Kildishev, A., Chettiar, U.
School of Electrical and Computer Engineering, Purdue University

Spatial Optical Analysis (SHA) of electromagnetic fields is a useful tool in analytical and numerical analysis of complex electromagnetic sources. A mathematical background for setting the Dirichlet boundary condition in the Finite Element Method (FEM) is shown.

Modélisation d'une décharge luminescente à la pression atmosphérique

Cormier, J.M., Semmar, N., Ouni, M.F.
GREMI, UMR 6606, Orléans

Les décharges luminescentes à pression atmosphérique sont étudiées expérimentalement en laboratoire pour la valorisation des alcanes et notamment la production d'hydrogène à partir du méthane. La modélisation des dispositifs usuels est complexe compte tenu de l'aspect non stationnaire des décharges. Afin d'évaluer le poids des paramètres de réglage d'un réacteur nous avons ...

Aharonov-Bohm interferometry with quantum dots as phase shifters : simulations

Alberty, J.M.
EIHES, Ecole d’Ingénieurs de Genève

Electron interferometry using the Aharonov-Bohm (AB) effect finds many applications in industrial areas such as future nanocomputer technologies, physical random number generators, electron phase microscopy and holography, to name just a few. The presence of a confined magnetic field surrounded by the interferometer arms, as originally proposed by Aharonov and Bohm is however a source of ...

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