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Ici vous trouverez les présentations issues des Conférences COMSOL à travers le monde. Réalisées par des utilisateurs de COMSOL Multiphysics, ces présentations explorent tous les domaines actuels d'innovation. Les applications couvrent pratiquement tous les secteurs industriels et impliquent des phénomènes électriques, mécaniques, fluidiques et chimiques. Utilisez la recherche rapide pour trouver les présentations les plus intéressantes dans votre domaine d'intérêt.

Modeling Large-Scale Mine Dewatering by Using Subsurface Flow Module in COMSOL Multiphysics

J. Molinero[1], A. Nardi[1], P. Trinchero[1]
[1]Amphos 21, Barcelona, Spain

Groundwater is a key factor affecting mine operations worldwide. On one hand, both underground and open pit mines need to pump out groundwater in order to proceed with mineral extraction and increase the stability of rock slopes. On the other hand, groundwater abstractions can produce undesired environmental and social impacts, which should be anticipated in the environmental impact assessments ...

Reliability Enhancement of Bio MEMS based Cantilever Array Sensors for Antigen Detection System using Heterogeneous Modular Redundancy

L. S. Sundharam[1]
[1]Kumaraguru college of Technology, Coimbatore, Tamil nadu, India

The objective of the work is to propose a reliability enhancement model for antigen detection system (ADS) using bio MEMS based cantilever array sensors using heterogeneous modular redundancy technique. The reliability of the ADS is expressed in terms of the constituent sub systems which are heterogeneous not only in their respective structures and behaviors but also in their forms. The possible ...

Estimation of Localized O2 Starvation Using 3D Modelling for PEM Fuel Cells

Ramesh P[1], S.P Duttagupta[1]
[1]Indian Institute of Technology Bombay,Mumbai, Maharashtra, India

Air breathing proton exchange membrane fuel cells have now found its use in wide range of domestic and commercial energy based applications. Optimization of Proton Exchange Membrane Fuel Cell system parameters and its safer operation under dynamic conditions ensure higher system output and longer device lifetime. Ensuring safety against oxygen starvation reduces the degradation of membrane ...

Analysis on Reaction Mechanism and Kinetics of CVD using COMSOL Multiphysics®

Yudai SUZUKI[1]

[1]The University of Tokyo, Tokyo, Japan

Chemical vapor deposition (CVD) is widely used in various fields including the fabrication of electronic devices due to its uniform film formation capability on the large-scale wafers and the minute 3D structures. In CVD, precursors (metal compounds) are commonly reacted in gas-phase as well as on the substrate to yield a film, and thereby it is rather difficult to reveal the reaction mechanism ...

Interaction between Light Wave and Asymmetric Metal/Insulator/Metal (MM) Structure Coupled with Subwavelength Holes at Optical Fiber Apex

Yasushi OSHIKANE[1]

[1]Osaka University, Suita, Osaka, Japan

Electromagnetic simulation of light wave interaction at around a tip of single mode optical fiber, which is formed of circular truncated cone shape, has been studied numerically by COMSOL Multiphysics and the RF Module (and Wave Optics Module). The fiber tip has specific nanostructure of asymmetric metal/insulator/metal (MIM) layers coupled with subwavelength holes. Behavior of surface plasmon ...

Updated Results of Singlet Oxygen Modeling Incorporating Local Vascular Diffusion for PDT - new

R. Penjweini[1], M. M. Kim[1], T. C. Zhu[1]
[1]Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA, USA

Introduction: Singlet oxygen (¹O₂) has a critical role in the cell-killing mechanism of photodynamic therapy (PDT). Therefore, in this study, the distance-dependent reacted ¹O₂ is numerically calculated using finite-element method (FEM). Herein, we use a model [Ref. 1] that has been previously developed to incorporate the diffusion equation for the light transport in tissue and the ...

Inclusive Routine of the Soil Surface Energy Balance in COMSOL Multiphysics® - new

M. Bortoloni[1], M. Bottarelli[2], Y. Su[3]
[1]Department of Engineering, University of Ferrara, Este, Italy
[2]Department of Architecture, University of Ferrara, Este, Italy
[3]Faculty of Engineering, University of Nottingham, Nottingham, UK

In ground-coupled heat pumps (GCHPs) the coupling between heat pumps and ground occurs by means of ground heat exchangers, that can be installed vertically inside boreholes (BHEs) or horizontally (HGHEs). In the horizontal installation, the heat exchangers are placed in shallow trenches dug few meters deep in soil. Unlike BHEs which benefit from the relatively stable temperature of deep soil, ...

Optimization and Simulation of MEMS Based Thermal Sensor for Performance of Transformer Oil

V. Vijayalakshmi[1], K. C. Devi[1]
[1]PSG College of Technology, Coimbatore, Tamil Nadu, India

In this work, a bimetallic strip based thermal sensor was designed using MEMS module of COMSOL Multiphysics® software to monitor the temperature rise in insulating oil which was used as coolant in transformers. The bimetallic strip was designed with different shapes such as cylindrical, rectangle, square & conical and different compositions such as Al/Steel Alloy and Fe/Cu which can withstand ...

Finite Element Modeling a Redox-Enzyme-Based Electrochemical Biosensor

Y. Huang[1], and A. Mason[1]
[1]Electrical and Computer Engineering, Michigan State University, East Lansing, Michigan, USA

This paper describes the modeling of an electrochemical biosensor embedded in a microfluidic channel to determine the concentration of a target biomolecule. The total amount of analyte in the sample can be calculated by integrating the analyte concentration over the duration of the peak current. The biosensor is constructed by immobilizing redox-enzyme on an interdigitated array (IDA) electrode ...

An All-Purpose Full-Vectorial Finite Element Model for Arbitrarily Shaped Crossed-Gratings

G. Demésy[1], F. Zolla[1], A. Nicolet[1], and M. Commandré[1]
[1]Institut Fresnel, Université Aix-Marseille III, École Centrale de Marseille, France

We demonstrate the accuracy of the Finite Element Method (FEM) to characterize an arbitrarily shaped crossed-grating in a multilayered stack illuminated by an arbitrarily polarized plane wave under oblique incidence. To our knowledge, this is the first time that 3D diffraction efficiencies are calculated using the FEM. The method has been validated using classical cases found in the literature. ...

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