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.

From PDE Toolbox to COMSOL Multiphysics 3.2: Past, Present and Future of Teaching and Research in Thermo-fluids

Enrico Nobile
Università di Trieste
Trieste, Italy

This presentation introduces the history of thermo-fluidics research and teaching and of COMSOL Multiphysics; from its beginnings as the PDE Toolbox until now. --------------------------------- Keynote speaker's biography: Enrico Nobile is Full Professor of thermodynamics and heat transfer at DINMA, University of Trieste. Prof. Nobile is author or co-author of more than 70 publications in ...

An Efficient Approach to Identifying a Complete Photonic Band Gap in Two-dimensional Photonic Crystals with Omnidirectional Light Propagation

Ming-Chieh Lin
Assistant Professor
NanoScience Simulation Laboratory
Department of Physics
Fu Jen Catholic University
Taipei, Taiwan

Omnidirectional light propagation in two-dimensional (2D) photonic crystals (PCs) is investigated. An efficient approach to identifying a complete photonic band gap (PBG) in 2D PCs has been developed. The in-plane band structure of 2D photonic crystals is calculated by an adaptive finite element method, as implemented in FEMLAB. Adopting the suitable boundary conditions, the eigenvalues can be ...

Numerical Shape Optimization of Photoacoustic Sample Cells: First Results

B. Baumann1, B. Kost1, M. Wolff1,2, H. Groninga2, T. Blöß1, and S. Knickrehm1
1Hamburg University of Applied Sciences, Hamburg, Germany
2PAS-Tech GmbH, Zarrentin, Germany

First results in the automatic shape optimization of a photoacoustic sample cell are described. The aim is to maximize the sensor’s signal strength. The approach considers all shapes that can be represented by a number of axis-symmetrical truncated cones which are connected in a continuous way. In addition, the cell is subjected to certain constraints (e.g. the laser beam is not blocked during ...

Numerical Model of a Very Light Jet Cavity

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

To prepare for the installation of a combined audio-ANC-system for a very light jet (VLJ), a finite element model of the investigated cavity was developed.Both an eigenvalue analysis and a time harmonic analysis were performed. The latter was needed to determine the transfer functions between error sensors and actuators.The simulations were performed using COMSOL Multiphysics. The results of the ...

Geodynamic Models of the Vøring Volcanic Margin

T. Pedersen
Institute for Energy Technology, Kjeller, Norway

Volcanic margins are characterized by excessive magmatic activity. One of the most studied volcanic margins is the Vøring margin, offshore mid-Norway. The large volumes of magmatic rocks found there are believed to have been produced by the melting of an abnormally hot mantle. We use COMSOL Multiphysics to investigate the hypothesis that the source of this thermal anomaly was a mantle ...

Cross Method of Nanoscale Modeling and Macroscopic Data to Estimate Anion Effective Diffusion Coefficient in Argillite

N. Diaz1, F. Goutelard1, and P.Turq2
1CEA/DEN/DPC/SECR/L3MR, CEN Saclay, Gif-sur-Yvette, France
2LI2C, Université Pierre et Marie Curie, Paris, France

Based on a mechanistical understanding of solute migration in pure clay at nanometric scale, a model has been developed to evaluate the effective diffusion coefficient De in clay-rocks at the centimetre scale from the description of the mineralogy (and its heterogeneity) of the rock at the micrometer scale.

Benchmark between CPO (Charged Particle Optics) and COMSOL Multiphysics

J.-M. Barois, and C. Goulmy
PHOTONIS, Brive, France

Streak tubes are widely used in high-speed signal analysis; they give spatial, temporal and intensity information about one single event. Time resolutions of 0.7 pico-second can be achieved and in that time-domain, PHOTONIS tubes are second-to-none.Applications are numerous and range from plasma physic to femtosecond laser applications. In streak tubes, electrons move from the photocathode to the ...

Geothermal Water in Oil Reservoirs: A new 2D Model solved with COMSOL

M. C. Suarez-Arriaga1, F. Samaniego2, and J. Bundschuh3
1Faculty of Sciences, Michoacan University, Morelia, Mich., Mexico
2Faculty of Engineering, National University of Mexico, Morelia, Mich., Mexico
3Instituto Costarricense de Electricidad (ICE), Morelia, Mich., Mexico

We developed a new numerical model able to predict the critical oil rate for which oil-producing wells can be invaded by geothermal brine. The model is a single nonlinear partial differential equation (PDE) which depends only on water saturation. This PDE is a 3D-generalization of the classical 1D-Buckley-Leverett model. To solve this model, we used Lagrange-quadratic finite elements into the ...

Teaching Computer-aided Modeling of Biomedical Processes in an Upper Level Undergraduate Course using COMSOL Multiphysics

V. Rakesh, and A. K. Datta
Dept. of Biological and Environmental Engineering, Cornell University, Ithaca, NY, USA

Computer-Aided Engineering: Applications to Biomedical Processes is a three credit course intended for seniors and juniors in Biological Engineering and Mechanical Engineering at Cornell University with a class size of about 50-55 students.The course introduces finite element modeling using COMSOL Multiphysics to solve biological/biomedical problems to students with a background in transport ...

A Numerical Approach to the Heat Transfer Studies inside the Human Eye

E. H. Ooi, and E. Ng Yin Kwee
School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore

In this presentation, abnormalities in the human eye are studied. The outline for the presentation is:Background of the ResearchModel DevelopmentSteady state solution of a normal eyeEffects of aqueous humor hydrodynamics on the temperature distribution inside the human eyeSummary

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