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.

FEM Study of Nano-structured Surface-relief Optical Data Storage

Kalavagunta, A.1, Neifeld, M.A.2
1 Vanderbilt University, Nashville, TN
2 Univerisity of Arizona, Tucson, AZ

We are studying the ability of subresolution optical structures to store data. We begin our study with surface relief structures. Because we are probing features whose sizes are much smaller than the wavelength of the readout light, retrieval of data from these structures requires near-field detection. The dimensions of the glass fill-in and the grooves of the above mentioned structure was ...

Complex K-Bands Calculation for Plasmonic Crystal Slabs by Means of Weak Formulation of Helmholtz's Eigenvalue Equation

G. Parisi[1], P. Zilio[1], F. Romanato[1]
[1]University of Padova, Padova, Italy

We present a Finite Element Method (FEM) to calculate the complex valued k(?) dispersion curves of a photonic crystal slab in presence of both dispersive and lossy materials. In particular the method can be exploited to study plasmonic crystal slabs. We adopt Perfectly Matched Layers (PMLs) in order to truncate the open boundaries of the model, including their related anisotropic permittivity and ...

Computation of Capacitance, Inductance, and Potential Distribution of Integrated-Circuit Interconnects for Unshielded Four Conductors with Three Levels Systems

S.M. Musa[1], M.N.O. Sadiku[1], J.D. Oliver[1]
[1]Prairie View A&M University, Prairie View, TX, USA

In this paper an attempt has been made to design and analyze integrated circuit interconnects for unshielded four conductors with three levels system using Finite Element Method (FEM). The computational and simulation work has been carried out with help of COMSOL Multiphysics software. We illustrate that FEM is as accurate and effective for modeling multilayered multiconductor transmission lines ...

Study on Electromagnetic Waves in the Terahertz Region Using COMSOL Multiphysics

T. Nishida[1]
[1]Shinshu University, Matsumoto City, Nagano, Japan

Electromagnetic waves in the terahertz (THz) region may be useful for non-destructive imaging and biosensing technology. This presentation shows the example of our research aimed at the development of application in the THz region. The result of comparing the FDTD method and COMSOL Multiphysics is demonstrated in the investigation of metamaterial and the photoconductive antenna.

Numerical Studies of a Confocal Resonator Pick-up with FEMLAB

Ekelöf, T., Ferrari, A., Johnson, M., Rydberg, A., Ziemann, V., Öjefors, E.
Department of Radiation Sciences, Uppsala, Sweden

Diagnostic devices aimed at measuring beam profiles in high intensity accelerators are often perturbed by microwave Fields generated by the beam itself upstream of the detection device, which propagate inside the vacuum pipe. These parasitic waveguide modes can significantly reduce the signal-to-noise ratio and thus the sensitivity of the beam monitor. This warrants investigation of detection ...

Analysis of Microwave Radiation for Heating

J. Crompton, S. Yushanov, L. Gritter, and K. Koppenhoefer
AltaSim Technologies, LLC.
Columbus, OH

Microwave heating is an important process for many commercial, industrial and household applications. In microwave heating applications, the energy is introduced directly into the volume of the material. As a consequence the quality of the process is highly dependent on the uniformity of the electromagnetic field distribution. Thus, developing a uniform electromagnetic field inside the ...

Wireless RF Digital System for Mouth-Embedded Multi-Sensor Communication

I.M. Abdel-Motaleb[1], J. Lavrencik [1]
[1]Department of Electrical Engineering, Northern Illinois University, DeKalb, IL, USA

There is urgent need to monitor dental and oral diseases, such as tooth decay, gum diseases, and teeth grinding. Such monitoring can be achieved by embedding sensors in the mouth. This technique faces some difficulties. The first is how the power needed for the operation of the sensors and the associated electronic chips can be generated. This power can be generated using the pressure exerted by ...

S-parameter Sensitivity Analysis of Waveguide Structures with FEMLAB

Li, D., Nikolova, N.K.
Computational Electromagnetics Research Laboratory, Department of Electrical and Computer Engineering, McMaster University, Hamilton, Ontario

For the purpose of accurate and efficient design of a microwave structure, sophisticated optimization techniques are typically used. The optimization process can greatly benefit from the availability not only of the objective function, but also its gradient. Numerical electromagnetic solvers do not provide the gradient information, thus defaulting to the finite-difference approximation at the ...

Modeling of Drying of Cellular Ceramic Structures: Coupled Electromagnetic and Multiphase Porous Media Model

A. Dhall[1], G. Peng[2], G. Squier[2], M. Geremew[3], L. Bogaczyk[2], J. George[3], W.A. Wood[3], and A.K. Datta[1]
[1]Biological and Environmental Engineering, Cornell University, Ithaca, New York, USA
[2]Manufacturing Technology & Engineering, Corning Inc., Sullivan Park, Corning, New York, USA
[3]Corporate Research, Corning Inc., Sullivan Park, Corning, New York, USA

Cellular ceramic substrates are extensively used for pollution control systems in vehicles. The manufacturing process of them can involve microwave drying. In this study, we describe the development of a modeling framework for the microwave drying process of these substrates. The transport model is implemented in COMSOL 3.5a using 4 PDEs: 1) Convection-Conduction for temperature, 2) ...

Computational study of Solidification and Melting of Alloys

Shuang-Shii Lian
National Taiwan University

This paper is written in Chinese. --------------------------------- Keynote speaker's biography: Since 1991, Prof. Shuang-Shii Lian has been with the Department of Materials Science and Engineering, National Taiwan University. He earned a PhD degree in Metallurgy at Technische Universität Berlin, Institut für Metallurgie, Germany in 1981. He is using COMSOL Multiphysics since 2002 ...

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