Aqui você encontrará apresentações realizadas nas Conferências de Usuários COMSOL de todo o mundo. As apresentações englobam pesquisas e produtos inovadores feitas por engenheiros e cientistas usando o COMSOL Multiphysics. Os tópicos abramgem uma grande gama de indústrias e aplicações, como elétrica, mecânica, escoamento e química. Use a função de busca "Quick Search" para encontrar apresentações na sua área de interesse.

Development of a COMSOL Application for the Efficient Evaluation of an Engineered Barrier System - new

D. Sampietro [1], E. Abarca [1], H. von Schenck [2], J. Molinero [1]
[1] Amphos 21 Consulting S.L., Barcelona, Spain
[2] Swedish Nuclear Fuel and Waste Management Co., Stockholm, Sweden

Radioactive waste repositories include barriers that work to contain the waste, thereby protecting human health and the environment. In deep geological disposal systems, barriers include the natural geological barrier and the engineered barrier system (EBS). The ability of the EBS to limit groundwater flow is important and optimized design solutions are often sought by means of numerical ...

FEM Modeling in Robust Design for Graphene-Based Electromagnetic Shielding - new

S. Elia [1], G. Granata [1], P. Lamberti [1], V. Tucci [1],
[1] University Of Salerno, Italy

Electromagnetic shielding design is usually approached referring to nominal values of the main parameters. This could lead to malfunctioning devices and its performance differ widely from what was really aimed at or, worse, the final design product could even be physically unrealizable. This work presents a robust approach to the design of EM Shielding based on Graphene (Gph) layers. It is a two ...

Air Bubbles Motion Through Fresh Concrete During Concreting Process - new

E. Chuta [1], J. Jeong [2],
[1] Université Paris-Est, IRC-ESTP, Cachan, France
[2] IRC-ESTP, Cachan, France

Over the last years, the concrete technology has progressed in order to improve the quality of its use and mechanical performances. Despite the technical development known in the context of concrete, the esthetic aspect remains weakly treated. Among the esthetic problems, there is the formation and dispersion of air bubbles (Bugholes) inside the concrete during the concreting process. An ...

Heating of Metal Nanoparticles on Absorbing Substrates - new

L. Bergamini [1], O. Muskens [2], N. Zabala [1], J. Aizpurua [3]
[1] UPV/EHU, Bilbao, Spain; Materials Physics Center and CSIC-UPV/EHU, Donostia-San Sebastian, Spain; Donostia International Physics Center, Donostia-San Sebastian, Spain
[2] University of Southampton, Southampton, UK
[3] Materials Physics Center and CSIC-UPV/EHU, Donostia-San Sebastian, Spain; Donostia International Physics Center, Donostia-San Sebastian, Spain

It is well-known that metal nanoparticles (NPs) excited at the plasmon frequency not only exhibit peculiar optical properties (e.g., a peak in the extinction spectrum, an enhanced electromagnetic near-filed) but also heat up [1]. This phenomenon is highly investigated for medical applications, but it can be exploited also for the realization of optical devices. In our study we use COMSOL ...

Simulation of a Parallelizable Flow-Focusing Constant-Volume Droplet Generator - new

D. Conchouso [1], A. Arevalo [1], D. Castro [1], I. G. Foulds [2]
[1] King Abdullah University of Science and Technology, Thuwal, Makkah, Saudi Arabia
[2] School of Engineering, University of British Columbia - Okanagan, Vancouver, BC, Canada

Parallelization of microfluidic droplet generators is one of the major challenges that droplet microfluidics has to overcome to contribute significantly towards the sustainable manufacturing of advanced materials such as nanoparticles, quantum dots, active pharmaceuticals, etc. A massive parallelization system needs to maintain consistency and uniformity across all droplet makers. To achieve ...

Simulation of the Response of Heterogeneous Solid Under Impulsive Loads - new

G. Leonardi [1], M. Buonsanti [1], F. Ceravolo [1], F. Scopelliti [1],
[1] University of Reggio Calabria, Italy

This paper study the mechanical response of a granular solid subject to an impulse force. The proposed model simulate the behavior of an airport pavement structure. The analysis is performed on a representative volume element (RVE) under thermo-mechanical actions, as those produced by landing gear impact of an airbus A320 and variable high surface temperatures loads. The model, implemented in ...

Stress Induced by Silicon-Germanium Integration in Field Effect Transistors - new

R. Berthelon [1], D. Dutartre [1], F. Andrieu [2]
[1] STMicroelectronics, France
[2] CEA Leti, France

The integration of high level of stress in field effect transistors is performed through incorporation of intrinsically strained SiGe layers. With the help of COMSOL simulations, we performed two studies addressing the level of stress in the area of interest. In the first case, we analyzed the geometric effects of the SiGe film stress relaxation on the edges. In a second time, we studied the ...

Simulation of Gas Injection with the Level Set Method - new

J. E. Rivera-Salinas [1], A. Cruz-Ramírez [1]
[1] National Polytechnic Institute - ESIQIE, Department of Metallurgy and Materials, Mexico

The physical mechanisms that operate in gas injection are complex, since the bubble formation at submerged orifices involves a wide range of length and time scales, bubble coalescence occurs, rapid pressure variations around the gas bubble produce the wobbling of the bubble, as well as the high velocities involved in the bubble bursting phenomenon on the free surface, among the others. In this ...

Micro-ARES, the Electric Field Sensor for ExoMars 2016: Atmospheric Interaction Simulations - new

G. Déprez [1], S. Cardnel [2], O. Witasse [2], F. Montmessin [1], F. Cipriani [2], A. J. Ball [2], F. Esposito [3]
[1] CNRS-LATMOS, Guyancourt, France
[2] ESA-ESTEC, Noordwijk, Netherlands
[3] INAF-OAC, Naples, Italy

Since 2011, LATMOS has been involved in the development of Micro-ARES, an electric field sensor forming part of the DREAMS science payload of the ExoMars 2016 Schiaparelli entry, descent and landing demonstrator module (EDM). Micro-ARES is dedicated to the very first measurement and characterization of Martian atmospheric electricity. The instrument, a compact version of the ARES instrument ...

Effect of Permeability Diminution in Nutrient Diffusion in Intervertebral Disc - new

M. A. Chetoui [1], O. Boiron [2], A. Dogui [3], V. Deplano [2],
[1] Université de Monastir, Ecole Nationale D'ingénieurs de Monastir; Ecole centrale Marseille, Marseille, France
[2] Aix-Marseille Université, CNRS, Ecole Centrale, Marseille, France
[3] Université de Monastir, Ecole Nationale D'ingénieurs de Monastir, Marseille, France

Intervertebral discs (IVD) are fibro-cartilages situated between vertebrae providing their joint flexibility. They play a major role in the transmission and absorption of load through the spine. The disc can undergo progressive structural and quantitative changes in its composition and morphology related to mechanical load applied to the spine which can lead to disc degeneration; this disease is ...

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