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.

Electro Magnetic Wave Simulation in Fusion Plasmas

O. Meneghini[1], and S. Shiraiwa[1]
[1]Plasma Science and Fusion Center, Massachusetts Institute of Technology, Massachusetts, USA

Fusion is a form of nuclear energy which has impressive advantages from the point of view of fuel reserves, environmental impact and safety. If successful, fusion energy would ensure a safe, resource conserving, environmentally friendly power supply for future generations. In a world wide cooperation to achieve this goal, seven parties including Europe, Japan, Russia, USA, China, South-Korea and ...

Numerical and Experimental Study of Flow, Heat Transfer and Concentration in a Scaled-up Fuel Cell Anode Channel Model

J. C. Torchia-Nüñez[1], and J.G. Cervantes-de-Gortari[1]

[1]Department of Thermal Engineering, National University of Mexico, UNAM, Mexico City, Mexico

Flow, concentration and temperature fields are studied with numerical and experimental methods inside a scaled-up fuel cell anode channel model. The low aspect ratio channel has a porous medium as the inferior wall where a mixing of different pH solutions occurs. Chromatic change of phenolphthalein is used to visualize concentration field and Particle Image Velocimetry (PIV) is used to visualize ...

Modeling Nanoscale Heat Flow

S. Palaich, and B. Daly
Physics and Astronomy Department, Vassar College, Poughkeepsie, NY, USA

When the dimensions of the material approach is a comparable size to the phonon mean free path, heat flow enters a new regime, the nanoscale. The Fourier and Cattaneo Equations describe bulk heat flow well, but radiative boundary terms must be considered when modeling nanoscale heat flow. We take these equations and input them into COMSOL with the hope of eventually linking nanoscale and bulk ...

Dependence of Potential and Ion Distribution on Electrokinetic Radius in Infinite and Finite-length Nano-channels

J. Schiffbauer[1], J. Fernandez[2], W. Booth[1], K. Kelly[3], A. Timperman[3], and B. Edwards[1]
[1]Physics Dept. West Virginia University, Morgantown, WV, USA
[2]Chemical Engineering Dept,West Virginia University, Morgantown, WV, USA
[3]Dept. of Chemistry, West Virginia University, Morgantown, WV, USA

A site-binding/dissociation model is used to determine surface charge in numerical studies of the equilibrium potential and ion distributions inside infinite and finite-length nano-channels. This COMSOL model allows us to investigate the response of surface (zeta) potential to environmental parameters such as reservoir salt concentration, solution pH and wall separation. The resulting ion and ...

Fluid-Structure Interaction Model of Active Eustachian Tube Function in Healthy Adult Patients

F. Sheer[1], and S. Ghadiali [1,2]
[1]Mechanical Engineering Department, Lehigh University, Bethlehem, PA, USA
[2]Department of Biomedical Engineering, Ohio State University, Columbus, OH, USA

The Eustachian Tube (ET) is a collapsible tube that connects the middle ear to the nasopharynx. Dysfunction in the ET leads to a disease called Otitis Media. Our goal is to develop and use fluid-structure interaction (FSI) models of ET opening phenomena to better understand what factors contribute to ET dysfunction in certain patients. We model the ET in COMSOL using geometric data obtained ...

Effect of Local Deformation on the Emission Energy of  Quantum Dots in a Flexible Tube

S. Kiravittaya[1], P. Cendula[2], A. Rastelli[2], and O. Schmidt[2]
[1]Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
[2]Institute for Integrative Nanosciences, Dresden, Germany

Strain induced by local deformation of a flexible micrometer-sized semiconductor tube is quantified by modeling a ball pressing on the tube wall. By changing the pressing condition, we are able to change the strain state of the tube wall incorporating self-assembled quantum dots (QDs) in the wall. The QD emission energy is calculated in COMSOL® by solving the Schrödinger wave equation ...

Stochastic Approach in Approximation of the Transient Plasma Sheath Behavior in FEM

J. Brcka
TEL US Holdings, Inc., Albany, NY, USA

Recently, the advanced plasma tools have been using very high frequency power sources (>100 MHz) and their combination to excite plasma utilized in semiconductor technology. This approach is evoking the regimes that are less understood and currently a subject to many studies and experimental investigations. The paper describes quasi-stochastic approach applied for sheath properties and ...

Electrical Impedance Sensor to Detect Tunnels and Infrastructure in Soil  

R. Gamache, and D. Spinelli
TransTech Systems, Inc., Schenectady, NY, USA

Tunnels and their detection have been a problem in warfare since the ancient world. Recent events have highlighted the ongoing problems of tunnels and the difficulties in locating them, not only in military situations, but also in law enforcement and homeland security applications as well. Electromagnetic and acoustic or seismic techniques may provide the significant advantage of a mobile non ...

Uniformity Correction for Fluid Coating Head

W. Vetterling
ZINK Imaging, Bedford, MA, USA

Slot coating is a widely used commercial process for applying one or more thin layers to a substrate such as paper, fabric, film or other material. In many cases, a highly uniform thickness is required, where a coating head that has been corrected for use with a Newtonian fluid may not produce a uniform coating when used with non-Newtonian fluids. With a multiphysics calculation involving the ...

Design and Characterization of a Small Volume Reactor for the High Pressure Invacuo Study of Catalytic Surface Reactions

C. Clark[1,2], J. Fulton[3], T. Adams[3], E. Podgornov[4], and F. Zaera[4]
[1]Department of Chemical and Environmental Engineering, University of California, Riverside, CA, USA
[2]Naval Surface Warfare Center, Corona, CA, USA
[3]Naval Surface Warfare Center, Crane, IN, USA
[4]Department of Chemistry, University of California, Riverside, CA, USA

The design and construction of ultra-high vacuum (UHV) systems for the study of surface reactions has lead to high impact innovation in a myriad of industries. A small volume reactor compatible with ultrahigh vacuum (UHV) surface-science instrumentation has been designed, modeled and tested for the study of the kinetics of surface chemical reactions on single crystals. CO oxidation experiments ...

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