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.

Modeling Spectral Emission Phenomena in Beryllium Plasma Using COMSOL Multiphysics

C. Gavrila[1], C. P. Lungu[2], and I. Gruia[3]
[1]Technical University of Civil Engineering Bucharest, Romania
[2]National Institute for Laser, Plasma and Radiation Physics, Bucharest, Romania
[3]University of Bucharest, Faculty of Physics, Bucharest, Romania

The purpose of this paper is to present a numerical modeling of plasma phenomena in beryllium emissions using COMSOL Multiphysics software. The Beryllium films were deposited on mirror polished fine grain graphite substrates using the Thermionic Vacuum Arc (TVA) technology available at NILPRP – Magurele, Romania. The developed system for thin film deposition using thermionic vacuum arc (TVA) ...

Impulsive Thermomechanics of hypersonic surface phononic crystals

F. Banfi[1], D. Nardi[2], and M. Travagliati[3]
[1]Dipartimento Matematica e Fisica, Università Cattolica, Brescia, Italy
[2]JILA, University of Colorado at Boulder, Boulder, Colorado, United States
[3]Center for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia, Pisa, Italy

Ultrafast optical generation of pseudosurface acoustic waves is investigated in hypersonic surface phononic crystals. The thermomechanics is modeled from first-principles to follow the initial impulsive heat-driven displacement in the time domain. Spectral decomposition of the displacement over the surface phononic crystal eigenmodes outlines asymmetric resonances featuring the coupling between ...

La5Ca9Cu24O41 Layers as 1D Heat Spreaders for Thermal Management Solutions

C. Orfanidou, and J. Giapintzakis
Department of Mechanical and Manufacturing Engineering
University of Cyprus
Nicosia, Cyprus

This paper deals with the design of a viable thermal management solution using La5Ca9Cu24O41 layers for heat channeling. The simulations are carried out with the finite element method using COMSOL Multiphysics Heat Transfer Module. COMSOL 4.2 was used to model and optimize silicon devices. Malfunctioning elements on silicon devices are sometimes converted into hotspots resulting in the ...

Coupled Gas Flow and Thermal and Reactive Transport in Porous Media for Simulating Waste Stabilization Phenomena in Semi-Aerobic Landfill

H. Ishimori, K. Endo, T. Ishigaki, H. Sakanakura, and M. Yamada
National Institute for Environmental Studies
Tsukuba, Ibaraki

Semi-aerobic landfill has interesting structure that passively provides the atmospheric oxygen into landfilled waste due to the heat convection generated by the decomposition of landfilled waste. There are limited studies on the mechanisms of the oxygen transport. This paper presents the governing equations and parameter estimation methods for the numerical simulation of the gas fluid flow and ...

Modeling a Cooling Skylight

M. Fält, and R. Zevenhoven
Thermal and Flow Engineering Laboratory, Department of Chemical Engineering
Åbo Akademi University

Air-conditioning produced by traditional vapor compression cycle is an energy demanding operation. By using passive cooling methods is it possible to avoid, or at least reduce, the need for vapor compression cooling. A passive radiative cooling method could be a three windowed skylight, filled with a greenhouse gas. Earlier modeling of such a skylight has shown promising results, and work has ...

Optimization of the Design of a GEM Tracker Based on Gas Flow Simulations with COMSOL

V. De Smet[1], V. Bellini[2], E. Cisbani[3], F. Noto[2], F. Mammoliti[2], C. M. Sutera[4], and M. Mangiameli[4]
[1]Dipartimento di Fisica ed Astronomia, Università di Catania, Catania, Italy; Haute Ecole Paul-Henri Spaak, ISIB, Bruxelles, Belgium
[2]Dipartimento di Fisica ed Astronomia, Università di Catania, Catania, Italy; INFN – Sezione di Catania, Catania, Italy
[3]INFN – Sezione di Roma - Sanità Group, Roma, Italy; Italian National Institute of Health, Roma, Italy
[4]INFN - Sezione di Catania, Catania, Italy

A Computational Fluid Dynamics study has been performed for a Gas Electron Multiplier (GEM) detector of high energy charged particles, currently under development as part of a new tracker of the high luminosity spectrometers in Hall A at Jefferson Lab. By gradual modifications of the geometry simulated in COMSOL, the design of the frame separating two GEM foils has been optimized with the aim ...

COMSOL Multiphysics in Modeling MOCVDs

Y. Shimogaki
Shimogaki Laboratory
Department of Materials Engineering,
The University of Tokyo

This paper showed that: * SAG-MOCVD is a powerful tool to fabricate OEICs and is also effective to extract true surface kinetics during MOCVD. * GaAs-MOCVD process was examined by SAG analysis where it was seen that below 600ºC, surface kinetics shows non-linear behavior. * Surface reaction rate constant of adsorbed species was constant against offset angle, while adsorption equilibrium ...

Modeling Pit Lake Flooding After Mine Closure

S. Jordana[1], A. Nardi[1]
[1]Amphos 21, Barcelona, Spain

Most of mining works, either on the surface or in the underground, demand continuous groundwater pumping in order to operate under dry conditions. When the mining activity stops, dewatering also stops and mining facilities begin to flood, quite quickly at the beginning but becoming slower as the water level in the pit lake rises. The rise of the surface of the lake decelerates due to the bigger ...

Investigation of Transport Phenomena in Nanochannels and its Applications in Energy Conversion using COMSOL Multiphysics

Chih-Chang Chang[1]
[1]Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Chutung, Hsinchu, Taiwan

Well‐designed and controlled nanochannels are ideal physical modeling systems to study fluidics in a precise manner. Electrokinetics refers to transport phenomena related to the non‐electroneutral EDL, which is created to neutralize the surface charges produced on surface. Surface charges are produced by the dissociation of surface functional groups. We created a mathematical model of a ...

Modeling Charge/Discharge Heat Generation of Li-ion Cells and Experimental Verification of Temperature Distribution

Tatsuya YAMAUE[1]
[1] Kobelco Research Institute, Inc., Kobe, Hyogo, Japan

Modeling the heat generation and the heat transfer of the electrode of lithium-ion battery are introduced. There are several models, such as an homogeneous heating model and a model considering the current and reaction distribution of electrode. Generally, electrodes have large area and the calculation load of the model becomes high. Therefore, some approximated models are required to analyze ...

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