Artigos Técnicos e Apresentações

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.

Stress Field Simulation for Quantitative Ultrasound Elasticity Imaging

L. Yuan[1] and P.C. Pedersen[1]
[1]Department of Electrical and Computer Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts, USA

Finite element models using COMSOL Multiphysics and MATLAB were developed to solve the problem of stress distribution interior homogeneous, isotropic, incompressible elastic solid material under known vertical external compression with a rectangular contact surface. Moreover, comparison between these results and analytical solutions was used to further validate that stress drops off with ...

Coupled Models of Lithospheric Flexure and Magma Chamber Pressurization at Large Volcanoes on Venus

G. Galgana[1], P. McGovern[2], and E. Grosfils[2]

[1]Lunar and Planetary Institute, Houston, Texas, USA
[2]Pomona College, Claremont, California, USA

We present an implementation of the Structural Mechanics module of COMSOL Multiphysics to model the state of stress associated with the emplacement of large volcanic edifices on the surface of a planet. These finite element models capture two essential physical processes: (1) Elastic flexure of the lithosphere beneath the edifice load, and (2) Pressurization of a magma-filled chamber that serves ...

Transport in Highly Heterogeneous Porous Media

G. Debenest, and M. Quintard
Institut de Mécanique des Fluides de Toulouse

Flows in highly heterogeneous media are found in many practical fields, such as hydrology, petroleum engineering, and chemical engineering. The case of two-region heterogeneous media (fractured media, catalytic beds, etc.) plays a fundamental role. The different questions associated to this specific case are illustrated in this paper for two different kinds of transport: (i) flow of a slightly ...

Numerical Investigation for Hydrogen Production using a Proton Exchange Water Electrolysis Cell

S.P. Katukota, J. Chen, and R.F. Boehm
University of Nevada, Las Vegas

Proton Exchange Membrane (PEM) electrolysis is potentially a sustainable and cost-effective technology for generating hydrogen. The present work is aimed to develop a numerical model for the PEM electrolyzer cell.

A Model for Tubular Solid Oxide Fuel Cells

C. Ciano
Politecnico di Torino

In this paper, a model of a tubular fuel cell is proposed and includes thermo-fluid dynamics, chemical reactions and electrochemistry. The main results presented are the temperature distribution, the concentration of species and the polarization curves.

Magnetic Liquids for Lab-on-a-chip and Rapid Diagnostics Applications

H. Köser
Yale University

In this presentation we outline our recent work on Magnetic Liquids, and the great number of application areas these are used. Ferrofluids are nanometer sized magnetic particles, covered by a surfactant, suspended in a carrier medium compatible with the surfactant material. Ferrofluids are applicable to a great and ever increasing number of application areas, such as: • Liquid Seals and ...

Influence of COMSOL on the Design and Testing of the High Flux Isotope Reactor HB-4 Cold Source: Validation of the Simulation

J. D. Freels
Oak Ridge National Laboratory

This presentation concerns our numerical and experimental research on the High Flux Isotope Reactor HFIR, located at the Oak Ridge National Laboratory. In this presentation we give a Brief Pictorial Introduction to the HFIR, som physical properties of Supercritical Hydrogen, and Simulations of both natural and forced convection problems using COMSOL Multiphysics. This presentation also ...

Modeling Light-induced Thermal Effects in Ocular Media by Finite Element Method

Francesca Rossi
Consiglio Nazionale delle Ricerche Firenze
Florence, Italy

COMSOL Multiphysics has been used as a supporting tool to our experimental research. Temperature rise inside biological samples was evaluated, giving us the possibility to study the heat damage induced in the tissue, the mechanism of photothermal processes, and to optimize surgical procedures. --------------------------------- Francesca Rossi was one of the keynote speakers at the COMSOL ...

Hybrid Photonic Crystal Simulation

Mohd Hanapiah Mohd Yusoff
Lecturer
Faculty of Applied Science
MARA Technology University
Malaysia

In this presentation, a 1.31/1.55μm wavelength division multiplexer (WDM) based on a 1-D linear array photonic band gap (PBG) structure interconnected with an input/output 2-D PBG array is presented. The linear array coupler parameters were obtained using eigen-mode expansion (EME) aided by optimization techniques based on global and local simplex search algorithm. The design is verified ...

A Survey of Multiphysics Applications for Materials and Processes

John Tanski
Staff Engineer
Los Alamos National Laboratory
Los Alamos, NM

In this presentation, the following modeling applications are considered: Heat treatment of carbon fiber-epoxy parts Growth and contact of corrosion spot Gas saturation in epoxy cartridges Design of mechanical assembly for corrosion All models are accompanied with a description of the physics, problem formulation as well as results from ...

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