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。

Towards Modelling Semiconductor Heterojunctions

R. Millett[1], J. Wheeldon[2], T. Hall[1], and H. Schriemer [1,2]
[1] Centre for Research in Photonics, School of Information Technology and Engineering, University of Ottawa, Canada
[2] Centre for Research in Photonics, Dept. of Physics, University of Ottawa, Canada

A 2D multiphysics model has been developed to simulate heterojunctions separating abruptly doped semiconductor layers of different dopant concentrations. Numerical results are presented for the case of nN, pN and PpN heterojunctions, and a general procedure for simulating multiple heterojunctions is described.

Implementation of ALE Moving Mesh for Transient Modeling of Nanowire Trajectories Caused by Electrokinetic Forces

S.M. Davison, and K.V. Sharp
Pennsylvania State University

Moving nanowires through microfluidic channels under electrokinetic forces can be a valuable technique to aid in the fabrication of certain devices. The trajectories of a nanowire under the influence of an externally applied electric field have been modelled through a straight channel, through a converging channel, and around a 90° corner. In a straight channel, a nanowire initially ...

Use of COMSOL Multiphysics for Efficient, Automatic Inverse Modeling of PDE-based Systems: Applications to Aquifer Characterization

M.A. Cardiff, and P.K. Kitanidis
Stanford University

Inverse Modeling refers to the practice of using measurements to estimate unknown parameters of a system, under conditions in which only a model for the forward problem is given. Here, we present a framework for the inverse modeling of PDE-based systems using COMSOL Multiphysics and MATLAB. Included in our framework is an automatic adjoint state formulation, allowing for more efficient ...

A Comparison of FDFD and FEM Methods Applied to the Buried Mine Problem

R. W. Gamache, C. Rappaport, and M. Farid.
TransTech Systems inc., Northeastern University

The major impediment to detection and characterization of low dielectric contrast nonmetallic buried in soil is the distorting and masking effects of clutter from rough ground surfaces and soil volumetric inhomogeneities. In this work, a 2D FDFD code developed specifically for the buried mine problem will be compared to a commercial FEM code, COMSOL Multiphysics.

Better Understanding of Resonance through Modeling and Visualization

D.O. Ludwigsen, C. Jewett, and M. Jusczcyk
Kettering University

Students encounter cavity resonance and waveguide phenomena in acoustics courses and texts, where the study is usually limited to cases with simple geometries: parallelepipeds, cylinders, and spheres. At Kettering University, we are beginning to employ finite element modeling in our acoustics classes to help undergraduates better understand the acoustic modes of actual structures. This ...

Study of the Electric Field Intensity in Bushing Integrated ZnO Surge Arresters by Means of Finite Element Analysis

M.R. Meshkatoddini
Shahid Abbaspour (PWUT) University of Technology, Tehran, Iran

In this paper, the electric field in different types of ZnO surge arresters has been investigated by means of finite element modeling using COMSOL Multiphysics. Both conventional and novel built-in-bushing type arresters were studied. Electric field modeling helps designers consider important factors affecting the maximum field intensity in the arrester, avoiding damages to the arrester ...

3-D Finite Element Modeling of a Nanostructure Enhanced SAW Sensor

Y.L. Rao[1], and G. Zhang[1-3]
[1] Micro/Nano Bioengineering Laboratory, Department of Biological and Agricultural Engineering, The University of Georgia
[2] Nanoscale Science and Engineering Center, The University of Georgia
[3] Faculty of Engineering, The University of Georgia

Integration of surface acoustic wave (SAW) devices with nanostructures has gained interest in the development of sensors with high sensitivity. To better design nanostructure integrated SAW devices, it is essential to model three dimensional (3-D) SAW devices and analyze the wave propagation characteristics in nanostructure-enhanced SAW devices. In this work, a 3-D finite element model of ...

Simulating the Generation and Guided Propagation of Terahertz Radiation using COMSOL Multiphysics

Jason A. Deibel
Rice University

Electromagnetic waves within the Teraherz frequency spectrum are common in medical techonolgy applications, such as imaging, spectroscopy and drug detection. In this presentation, we explain how Teraherz Radiation is used in different applications, how to produce Electromagnetic waves in the Teraherz frequency, and how to analyze them. Simulations in COMSOL Multiphysics are included as ...

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.

Single Mode Microwave Heating of Copper Powder Metal Compacts

J. Ma, C.T. Smith, G.J. Weisel, B.L. Weiss, N.M. Miskovsky, and D.T. Zimmerman.
The Pennsylvania State University.

We present numerical simulations that complement our experimental results of the microwave heating of copper powder metal compacts in separate electric (E) and magnetic (H) fields of a TE102 cavity. In general, thermal dissipation in the compacts may be attributed to resistive heating, dielectric losses, and magnetic losses. These dissipative mechanisms are coupled to the fields by the effective ...

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