See How Multiphysics Simulation Is Used in Research and Development

Engineers, researchers, and scientists across industries use multiphysics simulation to research and develop innovative product designs and processes. Find inspiration in technical papers and presentations they have presented at the COMSOL Conference. Browse the selection below or use the Quick Search tool to find a specific presentation or filter by application area.
View the COMSOL Conference 2019 Collection

Research of Dispersion Characters in Hexagonal Photonic Crystal Fiber Based on a COMSOL Multiphysics® Model new

X. Jiang[1], X. Kong[1], J. Wang[1], Q. Wang[2]
[1]School of Mathematics and Physics, Changzhou University, Changzhou, Jiangsu, China
[2]Institute of Modern Optical Technologies, Soochow University, Suzhou, Jiangsu, China

It is a complex problem to calculate the photonic crystal fiber model, and the methods of plane wave expansion, Hermite-Guasssian function and beam propagation have been analyzed. Finally the multipole method is adopted for solving problem. The hexagonal air holes in cladding have been ... Read More

Research on a Numerical Simulation Method about Harmonic Distortion of Loudspeaker new

X. Lu[1]
[1]Zhejiang Electro-Acoustic R&D Center, CAS, Zhejiang, China

扬声器的失真问题一直受电声业界的关注,尤其是谐波失真,它是影响扬声器重放声音音质的主要因素之一。 本文提出了一种基于 COMSOL Multiphysics® 软件预测扬声器谐波失真的仿真分析方法。该方法需建立包括磁场、振动系统和声场等多个物理场的扬声器的全模型,给扬声器加载一单频电压信号,用瞬态分析的方法可求解得到该频率激励下的扬声器的多个重要物理量随时间的变化函数,如流经音圈的电流I(t)、音圈的受力F(t)、振动系统表面上任意点的位移x(t),以及声场中任意点的声压P(t)等。给扬声器加载一个时间长度为0.1s的单频电压信号,仿真分析所得的防尘帽顶点的位移曲线 ... Read More

Numerical Prediction of Weld Bead Geometry in Plasma Arc Welding of Titanium Sheets new

V. Dhinakaran[1], S. Khope[1], N. S. Shanmugam[1] , K. Sankaranarayanasamy[1]
[1]National Institute of Technology, Tiruchirappalli, Tiruchirappalli, Tamil Nadu, India

Plasma Arc Welding (PAW) is one of the important arc welding processes commonly used in electronics, medical, automotive and aerospace industries due its high accuracy, finishing, and ability of welding any hard materials. It is an extension of Tungsten Inert Gas welding (TIG or GTAW). ... Read More

Multiphysics Simulation of Conjugated Heat Transfer and Electrostatic Field on Application of Electrostatic Chucks (ESCs) Using 3D-2D Model Coupling new

K. Hsu[1], C. Li[1], J. Yang[1], J. Chen[1], J. Chang[1]
[1]Institute of Applied Mechanics, National Taiwan University, Taipei, Taiwan

There has been considerable interest in the electrostatic chucks (ESCs) in recent years. Wafer cooling by means of gas at the backside of wafers plays an important role in electrostatic chucks and it uses an electrostatic potential to secure the wafer. In this study, the correlation of ... Read More

稳态磁场对激光熔凝熔池的抑制作用研究 new

王梁[1], 胡勇[1]
[1]浙江工业大学,杭州,浙江,中国

激光熔凝通常被作为材料表面的最终处理工艺,然而激光熔凝处理后,材料表面容易出现高低起伏的波纹,降低了其表面质量。因此,为了在激光熔凝处理后获得平整的表面,同时降低后续机加工所需的成本和时间,本文提出了利用稳态磁场抑制激光所致熔池运动的方法。以固液相变统一模型为基础,建立了考虑热传导、流体运动、相变及电磁场作用的多物理场耦合2D瞬态仿真模型,将洛仑兹力以体积力形式添加到动量方程源项中,并利用移动网格(ALE)的方法在模型中计算了熔池表面的运动形态 ... Read More

关于气泡在LIMCA系统中变形的数值模拟 new

杨文志[1], 王晓东[1]
[1]中国科学院大学,北京,中国

LIMCA技术是一种原位测量高温液态金属中杂质颗粒的方法。测量的原理为:在一个小孔内外设置一对电极,并且通以电流,这样可以在孔口附近形成一个电敏感区,当杂质经过电敏感区时,通过测量电压脉冲信号以检测杂质的信息。对硬质颗粒的LIMCA技术已经有了许多研究,但实际情况下有些颗粒如气泡是可变形的,这将损害LIMCA的精度。 模型使用了 COMSOL Multiphysics® 中的“层流两相流-相场”和“电磁场”模式,气泡和液态铝以相同的初始速度向相同方向运动,同时在液态导电金属中通以电流。由于流体和气泡是运动的,流动会受到洛伦兹力的影响,所以在流场中加入由电磁场计算得到的 ... Read More

Sound Cavity Acoustic Resonance Analysis of a Microspeaker/微型扬声器音腔声谐振分析 new

Z. Zhang[1], X. Deng[1]
[1]Jiangxi Lianchuang Hongsheng Electronic Co.,LTD, Nanchang, Jiangxi, China

移动电话产品向更薄的趋势发展,装入手机中的微型扬声器能使用到的音腔空间也就日趋减少。为了高效利用手机内部空间,手机音腔设计时往往导通扬声器位置周围的小空间作为其音腔,扩大音腔体积。与此带来的问题是,因手机内部空间限制,导通管或导通孔规格较小,产生了声谐振效果。谐振频率点往往位于重要的中频段,使声压级中频段曲线出现波谷,影响声学性能和听感效果。 本文说明了声谐振产生的原因,并通过电力声类比,用理论方法估算出声谐振频率点的大致范围。为了解决声谐振产生的问题,我们使用 COMSOL Multiphysics® 准确模拟出扬声器声腔的 SPL 曲线,通过 SPL ... Read More

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