Here you will find presentations given at COMSOL Conferences around the globe. The presentations explore the innovative research and products designed by your peers using COMSOL Multiphysics. Research topics span a wide array of industries and application areas, including the electrical, mechanical, fluid, and chemical disciplines. Use the Quick Search to find presentations pertaining to your application area.

2차원 및 3차원 맨틀 플룸의 벤치마크

Y. Kim, C. Lee [1]
[1] Department of Earth and Environmental Sciences, Chonnam National University, South Korea

최근의 수치모델링 연구들은 맨틀 플룸(mantle plume)이 배호(back-arc)지역의 분지 및 산맥(basin and range)과 유사한 지구조를 형성시키는 성인임을 제시하였다. 섭입 슬랩 후퇴(slab roll-back) 현상에 의해 지각에 가해지는 인장력과 지각 아래로부터 상승하는 뜨거운 맨틀 플룸으로 인한 지각 강도 감소가 더해져 배호 지역에 분지를 형성시킨다는 것이다. 이처럼 분지 형성 작용에 있어 맨틀 플룸의 역할이 중요해짐에 따라, 수치모델링의 필요성이 커지고 있기 때문에 초기 연구로써 우리는 2차원 및 3차원의 맨틀 플룸 수치모델링을 수행하였다.

The Effect of Induced Electron Diffusion on the Optical Properties of Plasmonic Nanostructures

Changyin Ji [1], Qingfan Shi [1], Yongyou Zhang [1], Ning Zheng [1], Liangsheng Li [2]
[1] Beijing Institute of Technology, School of Physics, Beijing, China
[2] Science and Technology on Electromagnetic Scattering Laboratory, Beijing,China

Recently, the researchers usually use the hydrodynamic Drude model (HDM) to investigate the nonlocal optical response of metallic nanostructure. The advantage of the HDM is easy to implement numerical calculation for larger and more complex-shaped nanoplasmonic structures. For the HDM, it is predicted that the nonlocal response blueshifts the resonance peak, modifies the electric field ...

基于COMSOL的电容成像传感器仿真研究

李振 [1], 李晨 [1], 符嘉明 [1], 曹松 [1], 王克凡 [1],
[1] 中国石油大学(华东)、青岛、山东、中国

本文针对电容成像传感器仿真分析的难点,以 8 极板电容成像传感器为例,建立了电容成像传感器的三维有限元仿真数学模型,详细介绍了如何使用 COMSOL 软件对电容成像传感器进行三维仿真,后处理结果表明8极板电容成像传感器能检测到有机玻璃内部 7 个不同深度的缺陷,验证了电容成像检测技术的可行性。除此之外还运用 COMSOL 对 8 极板电容成像传感器的电容值进行提取分析,并与实验结果相对比,结果表明两者的检测结果相吻合。此方法方便了电容成像检测技术正问题的研究,为运用COMSOL软件对电容成像传感器的性能分析与参数优化提供了依据。

Design & Finite Element Analysis of Micro Electro Mechanical Capacitive Temperature Sensors

N. Z. Khan [1],
[1] Rutgers University, New Brunswick, NJ, USA

This paper presents the design and simulation of novel micrometer-scale capacitive temperature sensors, which could serve as a component for miniaturized wireless sensor nodes for the internet of things requiring structural flexibility and optical transparency. The proposed sensor design employs a conventional, planar interdigitated capacitor structure, explores the thermo-mechanical property ...

Numerical Model Simulation of Impedance Based Control for RF Ablation Using Isolator Synergy Clamp

M. Etheridge [1], R. Lopusnik [1], A. Cates [1],
[1] AtriCure, Inc., Minnetonka, MN, USA

Thermal ablation is rapidly becoming a standard of care for the treatment of atrial fibrillation (AF), a cardiac disorder characterized by irregular heart rhythm and estimated to impact more than 33 million people worldwide (Chugh et al. Circulation (2013)). AtriCure is a company that specializes in epicardial ablation for AF and here we describe modeling the performance of the Isolator Synergy ...

基于COMSOL的钻头电阻率仪器RAB数值模拟

李铭宇 [1], 康正明 [1], 李君建 [1],
[1] 中国石油大学(北京),昌平,北京 ,中国

引言:在石油钻井技术日益发展的今天,随钻电阻率测井发挥着越来越重要的作用。国外的技术相对成熟,各大公司都推出了自己的随钻电阻率测井仪器,但我国的高端随钻装备仍处于起步阶段,目前尚未达到规模化生产和应用。通过对已经成熟的仪器进行仿真,可以指导我们后续仪器的研发生产以及实际资料的处理解释。本文借助COMSOL MULTIPHYSICS仿真平台,在DC模块中建立了三维模型,考查了斯伦贝谢公司的随钻钻头电阻率测井仪RAB(Resistivity-At-Bit)在油基泥浆和水基泥浆中的测井响应。通过COMSOL WITH MATLAB实现脚本加载模型并控制数据按一定格式输出为文本文件。 结果:RAB仪器的仪器常数与钻铤尺寸有关,分别考察了发射螺绕环上方钻铤长度和最下方接收螺绕环下方钻铤长度对仪器常数的影响。钻头测量R3的仪器常数主要取决于接收螺绕环下方钻铤的长度 ...

Two-Phase Modeling of Gravity Drainage of Bitumen from Tar Sand Using In-Situ RF Electrical Heating

A. Hassanzadeh
Pyrophase Inc., Chicago, IL, USA

In-situ electrical heating technologies are among the most recent technologies used for bitumen recovery from tar sand and oil shale. These technologies have limited environmental impact because there is little disturbance of the land, and water and solvents are not used. Two-phase movement of bitumen and air in tar sand porous deposit is modeled using COMSOL Multiphysics. A system of non-linear ...

Magnetic Ratchet

A. Auge, F. Wittbracht, A. Weddemann, and A. Hütten
Department of Physics, University of Bielefeld, Germany

Transport phenomena in spatially periodic magnetic systems, in particular the directed transport of magnetic beads in a so called magnetic ratchet (Brownian motor) are considered. Simulations are carried out to test and optimize this system, where the Smoluchowski equation with flux terms for the magnetic and gravitational force is used. Furthermore, experiments are carried out to verify the ...

In-Situ Detection of Inclusions in Liquid Steel

X. Wang, R. Guthrie, and M. Isac
McGill Metals Processing Centre, Montreal, Canada.

A numerical multiphase flow model is proposed to predict the behavior and motion of entrained inclusions in liquid steel, as they enter the orifice of a LiMCA (Liquid Metal Cleanliness Analyzer) sensor for assuring steel quality. The method of measurement is based on the electric sensing zone (ESZ) technique. The liquid metal flow field within the ESZ is obtained by solving the Navier-Stokes ...

Modeling of Shrinkage Behavior in Cement Paste Using Thermal-structural Interaction

T. Chen[1], and P.G. Ifju[1]

[1]University of Florida, Gainesville, Florida, USA

This paper describes using thermal-structural interaction to model the shrinkage behavior in cement paste under drying. An inverse method of combining the finite element analysis and the least-squares method is implemented to fit experimentally determined shrinkage in order to obtain material properties from the complex geometry used in the tests. The finite element model is created using COMSOL ...