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.

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 ...

Modelling of Tissue Morphogenesis as the Resultant of Constitutive Cells Activities

L. Forest
Laboratoire Techniques de l'Imagerie, de la Modélisation et de la Cognition, Faculté de Médecine, Domaine de la Merci

The aim of this work is to study tissue morphogenesis as a consequence of the constitutive cells dynamics. Tissue morphogenesis is modelled as a cellular system coupled with a global chemical control. p> Two concrete examples are presented, the secondary growth of conifer trees and the epithelial invagination.

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
Faculty of Applied Science
MARA Technology University

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 ...

Analysis of Heat Transfer and Phase Change in Laser-Assisted Direct Imprinting Processes

F. K. Chung, Y. L. Wang, C. H. Chen
Department of Mold and Die Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung , Taiwan

In this study, a model cast in COMSOL Multiphysics has been developed for the analysis of heat transfer and phase change during laser-assisted direct imprinting processes. The features of this model include the employment of temperature-dependent thermal properties, the use of equivalent specific heat for the treatment of latent heat of fusion, automatically switching the thermal contact ...

Optimum Design of Dual-modality Sensing Electrode Array

W. Huaxiang, W. Jing, H. Li, and J. Weiwei
School of Electrical Engineering & Automation, Tianjin University, Tianjin, Taiwan

Sensing electrodes array model of 3-Dimensional ERT/ ECT dual modality is established by using the software COMSOL. According to the uniformity of sensitivity field distribution, the correlation coefficient and the reconstructed image space resolution, the ECT/ERT dual modality sensing electrode arrays are optimized. Experimental results show that the optimized sensing electrode array of the ...

Transient Spreading of Films on Heterogeneous Surfaces

J. Frassy1, C. Lecot2, M. Murariu1, C. Delattre3, and A. Soucemarianadin1
1Université Joseph Fourier, Grenoble, France
2Université de Savoie, Le Bourget-du-Lac, France
3LETI, CEA, Grenoble, France

We present results of simulations of a thin liquid film flowing down an inclined plane. Within the lubrication approximation, and assuming complete wetting, the film height is the solution of a time-dependent non-linear fourth order partial differential equation, which is solved using COMSOL.Appropriate initial and boundary conditions are proposed and the influence of the height of the precursor ...

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