科技论文和展示

这里您可以找到在全球 COMSOL 年会上所有用户报告的演示文稿。这些演示文稿介绍 COMSOL 用户是如何使用 COMSOL Multiphysics 进行创新性研究和产品设计。研究主题涵盖了包括电气、机械、流体和化工等范围广泛的行业和应用领域。请使用“快速搜索”来查找与您的研究领域相关的演示文稿。

Comparison of Two-Dimensional PEM Fuel Cell Modeling using COMSOL Multiphysics

Z. Shi, X. Wang, and Z. Zhang
Oakland University, Rochester, MI

Two different two-dimensional mathematical models of the one PEM fuel cell are modeled using COMSOL Multiphysics, each considering a different cross-section. The first Models considers the influence of fluid behavior in the channel, while the second considers the interdigitated flow pattern. Results, including the mass concentration, the polarization curve, potential distribution and velocity ...

FEM Simulation of a Micro-Cantilever Optical-MEMS Sensor

V. Mathur, J. Li, and W.D. Goodhue
Photonics Center, Department of Physics and Applied Physics, University of Massachusetts, Lowell

In this work a micro-cantilever optical-MEMS sensor based on the AlGaAs system is designed and modeled. The device consists of two micro-cantilever beams perfectly aligned with the free ends separated by approximately 200 nm up to 2000 nm. The finite element method (FEM) (COMSOL Multiphysics) has been employed here to model the structural deformation and light propagation through the device. ...

Using COMSOL Multiphysics to Model Viscoelastic Fluid Flow

B.A. Finlayson
Department of Chemical Engineering, University of Washington

Viscoelastic fluids have first normal stress differences even in rectilinear flow. Thus, they are more complicated than purely viscous non-Newtonian fluids modeled as a power-law model or Carreau model. Viscoelastic effects must be included when modeling the flow of polymer melts and concentrated polymer solutions in situations for which the normal stresses matter. The extrudate swell problem ...

Hybrid Modeling of a DC Magnetron Plasma Discharge

S.D. Ekpe[1], F. Jimenez[2], and S.K. Dew[2]
University of Alberta, Edmonton

This work is focused on the coupling of a Monte Carlo code with COMSOL Multiphysics conduction/convection, and electrostatic modules in solving fluid-Poisson model for the plasma properties for a practical DC magnetron low pressure plasma discharge. The magnetostatic module was used in calculating the required magnetic field.

Solidification of a Liquid Metal Droplet Impinging on a Cold Surface

Tanai L. Marin,
Faculty of Physics and Mathematics Sciences,
Department of Mining Engineering,
University of Chile,
Santiago, Chile

A method for the solidification of a free surface liquid phase is presented and solved with COMSOL Multiphysiscs using a fixed grid. In this case, the Level set method with phase re-injection for mass conservation is used to prescribe the movement of the free surface of the liquid droplet, whereas a modified version of the method presented by Voller and Prakash is used to account for the ...

Simulation of an Electrical Impedance Based Microfluidic Biosensor for Detection of E.coli Cells

B. Srinivasan[1], S. Tung[1], Y. Li[2], and M. Varshney[2]
[1] Department of Mechanical Engineering, University of Arkansas
[2] Department of Biological and Agricultural Engineering, University of Arkansas

The impedance based biosensor utilizes the electrical impedance measurements between interdigitated electrodes integrated into a microchannel containing the target cells in a suspension medium. The detection is based on measuring the change in impedance caused by the presence of bacteria. In this paper we describe the simulation of impedance measurements using the electromagnetics module of ...

Development of a Coupled 2D-3D Fuel Cell Model for Flow Field Analysis

G.H. Miley[1], G. Hawkins[2], and J. Englander[2]
[1] Department of Nuclear, Radiological, and Plasma Engineering, University of Illinois at Urbana-Champaign
[2] Department of Aerospace Engineering, University of Illinois at Urbana-Champaign

The sodium borohydride and hydrogen peroxide liquid fuel cell developed at the University of Illinois shows promise as a viable energy source for a wide range of applications. To achieve higher powers for a fixed active area, an optimal flow field design is desired, and a coupled 2D-3D model of the fuel cell was developed using the COMSOL Multiphysics software package. The model is governed by ...

COMSOL Modelling of the Gas Mixing Process in a Ripple Reducer for NPL’s Time Division Dilution System

J. Wang, B.A. Goody, and M.J.T. Milton
National Physical Laboratory, Teddington, Middlesex, UK

The mixing process of a ripple reducer designed for a time division dilution system (TDD) that dynamically generates calibration gas mixtures is modelled in 2D using COMSOL Multiphysics. The model can been used to visualize and optimize the mixing process and extract parameters of interest at chosen times and positions. The simulated time response of an analyte concentration agrees with ...

Modeling Mechanical Stress in the Silicon Fabrication Process using COMSOL Multiphysics

A. Kalavagunta
Vanderbilt University

This paper discusses the impact and modeling of stress experienced during the silicon fabrication process for Mosfets. The work addresses some of the issues that come up while trying to model the impact strain has on device performance. Strain dependent mobility models are also discussed.

Modeling Acoustic Wave Scattering from Cells and Microbubbles

O. Falou [1], J.C. Kumaradas[2], and M.C. Kolios[1,2]
[1] Dept. of Electrical and Computer Engineering, Ryerson University
[2] Dept. of Physics, Ryerson University

A finite-element model of wave propagation using COMSOL Multiphysics has been developed to solve the problem of ultrasound scattering from spherical structures. This model will be used to predict ultrasound backscatter from cells for ultrasound tissue characterization, and scattering from microbubble contrast agents. In this paper, we discuss an improvement to our model by using a ...

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