See How Multiphysics Simulation Is Used in Research and Development


In questa sezione troverete i lavori presentati alle Conferenze mondiali COMSOL. Le presentazioni descrivono ricerche e prodotti innovativi progettati con COMSOL Multiphysics da colleghi di tutto il mondo. I temi delle ricerche presentate abbracciano un'ampia gamma di settori produttivi e aree applicative, in ambito elettrico, meccanico, fluidodinamico e chimico. Lo strumento di Ricerca Rapida vi permetterà di trovare le presentazioni che si riferiscono all'area di vostro interesse.
View the COMSOL Conference 2018 Collection

利用COMSOL Multiphysics®对锂电池进行容量衰减预测 new

李金东 [1], 吴旭 [1],
[1] 华中科技大学,武汉,湖北,中国

在能源危机和气候变化的背景下,电动汽车和混合动力汽车产业快速发展,锂离子电池在其中发挥着重要作用。锂离子电池使用过程中的容量衰减研究是该领域中的一个重要课题。锂锰氧化物(LMO)由于其经济、无毒害等优点,成为锂离子电池的常用阴极材料之一。有文献报道,在电解液中六氟磷酸锂分解产生质子的情况下,锂锰氧化物会发生分解,锰离子发生溶出并在阳极发生沉积,这是造成锂离子电池容量衰减的原因之一。本模型通过仿真上述过程,分析锂锰氧化物的分解与沉积对电池容量衰减的影响。使用COMSOL Multiphysics®进行建模,参考案例库中的锂离子电池容量衰减模型(Application ID ... Per saperne di più

Clean Energy Technologies: Growing Need for Multiphysics Modeling

Iouri Balachov
Senior Scientist,
SRI International, Menlo Park, CA, USA

Iouri Balachov is a Senior Scientist at SRI International (Menlo Park, CA) where he is leading development of Direct Carbon Fuel Cell technology for clean and efficient power generation from coal, biomass, and a wide variety of carbon containing fuels. Prior to SRI he was an engineer at ... Per saperne di più

Application for Ultrasensitive Biosensing by Nanodevise

[1]Takatoki YAMAMOTO

Tokyo Institute of Technology, Yokohama, Kanagawa, Japan[1]

It is possible to obtain novel functions using nano-scaled structures and related physics that are impossible to be realized by conventional macro-scale technology. Thus, we are trying to understand the physics dominated by nanostructure and to develop the biosensing applications. Here, ... Per saperne di più

Thermo-mechanical Modeling of Pu-238 Production Target at HFIR

C.J. Hurt [1], J.D. Freels [2],
[1] University of Tennessee, Knoxville, TN, USA
[2] Oak Ridge National Laboratory, Oak Ridge, TN, USA

The production model in the COMSOL Multiphysics® software makes use of the most up-to-date PIE data, material property inputs, and modeling methodology. The fully coupled thermo-mechanical equations are solved over the entire domain, significantly increasing the degrees of freedom ... Per saperne di più

Si-Infiltrated SiC Lattices in Elevated Temperatures: A Thermo-Mechanical Analysis

E. Rezaei [1],
[1] EPFL, Lugano, Switzerland

Si-infiltrated SiC porous composites exist in different forms composed of cores of cellular ceramic and skin plates of ceramic matrix composites. Due to high thermal conductivity, low coefficient of thermal expansion, high elastic modulus and high strength, the final product can be a ... Per saperne di più

固体废弃物处置回转窑的高温结渣行为 new

胡万鹏, 罗义英 [1], 周佳伟 [2],
[1] 嘉兴学院 化学工程研究所, 建筑工程学院
[2] 嘉兴市固体废弃物处置中心

采用回转窑处理工业废弃物已有多年历史。工业废弃物里含有的有机物在高温下挥发、气化、裂解和燃烧,最后残留下含有硅、钙、铁等无机物,无机物构成了高温的具有一定粘度的炉渣。 高温炉渣夹杂着一定量的气泡。气泡可能从下列几个方面产生: 1)有机物裂解挥发产生的气体; 2)燃烧产生的气体; 3)夹带的气体; 4)液体在高温下的汽化。 从工业现场采集炉渣样品,获取了炉渣的微观结构。计算机模拟的过程揭示炉渣结构形成的过程。 研究表明,采用COMSOL Multiphysics流体力学模块和传递模块,二维非对称结构能够有效模拟高温炉渣的流动过程 ... Per saperne di più

NMC523电池针刺热失控模拟 new

李航 [1], 刘朝玥 [1], 赖少波 [1],
[1] 厦门大学化学化工学院

NMC523电池因为其较高的容量,已经逐渐应用于动力电池行列,但是锂离子电池在使用过程中的不合理容易引发热失控事故。这项模拟工作是来验证探讨NMC523电池针刺热失控中的机理。模拟过程中用到COMSOL化学反应工程模块、全局常微分方程模块。通过模拟,能够看到针刺过程中电池电压变化以及跟随的温度变化。这项模拟工作参考了部分主流杂志的模拟思路,也融合了自己的理解从而进行建模计算。此次模拟能够为电池针刺热失控机理探究提供思路,也能够为正确使用锂离子电池提供建议。 Per saperne di più

A triple band cross-polarization converter based on ultra-thin graphene-integrated metasurface new

Zhifei Yao [1], Yueke Wang [1], Shumei Gao [1],
[1] Optical Information Science and Technology Department, Jiangnan University, Wuxi, Jiangsu, china

We propose a triple band tunable and high-efficient reflected cross-polarization converter (CPC) in the mid-infrared. The study of graphene-integrated CPC becomes increasingly important, due to its tunable optical performance and small volume. Graphene, a monolayer of carbon atoms placed ... Per saperne di più

沥青路面中入射频率对超声波传播衰减的影响 new

李树伟 [1], 章天杰 [1], 顾兴宇 [1],
[1] 交通学院,东南大学,南京,江苏

超声波无损检测是一种相对成熟的技术,具有快捷、准确、高效等优势,广泛应用于医疗、制造、建筑等行业。在道路检测领域,由于沥青路面材料的复杂特性,特别是粘弹性,限制了超声波无损检测的大规模商用。同时,考虑到粘弹性介质对频率敏感度很高,入射频率的合适与否直接决定了超声波检测的效果。因此,本文以入射频率为变量,探究其对超声波在沥青路面中传播衰减的影响。 建立二维模型,主体分为沥青路面结构和压电换能器两部分,属于声学、电学与力学的多物理场耦合。沥青路面结构部分使用“固体力学”模块,根据实际情况,结构分为三层并分别定义材料参数,同时用Kelvin-Voigt模型表征其粘弹性 ... Per saperne di più

飞秒激光加工TC4钛合金的温度场数值模拟 new

乔军 [1], 谢杨 [1], 候忠霖 [1], 孙建华 [1],
[1] 辽宁科技大学,鞍山,辽宁,中国

本文基于热传导方程,采用COMSOL有限元模拟软件中的固体传热接口研究TC4钛合金在进行飞秒激光表面扫描过程中的温度场变化。模拟采用控制变量法,通过改变不同的加工参数(脉冲能量、重复频率、扫描速度等)模拟飞秒激光加工对TC4钛合金表面瞬时最高温度的变化的影响。模拟结果表明,在多脉冲飞秒激光照射下,单个脉冲能量越高,热积累的平衡温度越高;脉冲重复频率越高,表面接受总能量越多,热积累平衡温度越高;扫描速度可以影响热积累的平衡,改善材料因表面最高温度过高而发生的氧化或熔化等不良现象。模型的模拟结果与经过验证的基于Matlab软件的数值模型的模拟实验结果相近 ... Per saperne di più