See How Multiphysics Simulation Is Used in Research and Development


Ici vous trouverez les présentations issues des Conférences COMSOL à travers le monde. Réalisées par des utilisateurs de COMSOL Multiphysics, ces présentations explorent tous les domaines actuels d'innovation. Les applications couvrent pratiquement tous les secteurs industriels et impliquent des phénomènes électriques, mécaniques, fluidiques et chimiques. Utilisez la recherche rapide pour trouver les présentations les plus intéressantes dans votre domaine d'intérêt.
View the COMSOL Conference 2018 Collection
Acoustics and Vibrationsx

Analysis of High-Frequency Thermoacoustic Instabilities in Lean, Premixed Gas Turbine Combustors

F. Berger [1], T. Hummel [1], P. Romero [1], M. Schulze [1], B. Schuermans [2], T. Sattelmayer [1],
[1] Lehrstuhl für Thermodynamik, TU München, Germany
[2] GE Power, Switzerland

Modern gas turbine systems for power generation are prone develop so-called thermosacoustic instabilities in the combustion chamber. Physically, these instabilities emerge as large amplitude pressure oscillations within the combustor, which are caused by constructive feedback ... En Savoir Plus

Advanced Loudspeaker Calculator – an Example of COMSOL® Apps Utilization

F. Malbos [1], M.K. Bogdanski [2], M. Strauss [2],
[1] Harman France, VPDT, Paris, France
[2] Harman International, VPDT, Straubing,Germany

Developing a new loudspeaker design requires not only knowledge and experience in the field, but also an access to verified and efficient tools. HARMAN’s Virtual Product Development (VPD) team has developed a Comsol Application to serve at the early stages of the design process. The app, ... En Savoir Plus

Acoustic Modeling of a “Minute Repeater”

S. Charron [1],
[1] Intermezzi ingénierie acoustique, Paris, France

The project was ordered by a Swiss watchmaker. The aim was to modelize and optimize the acoustic of a minute repeater on one of the high range item made by the watchmaker. Therefore we based our work on a simplified geometry made by Creo. The mesh model includes the gongs, the bottom ... En Savoir Plus

Design Of Acoustic Metamaterials Based On The Concept Of Dual Transmission Line

A-S.Moreau[1], H.Lissek[1], and F. Bongard[2]
[1]Ecole Polytechnique Fédérale de Lausanne, Switzerland
[2]JAST SA, Antenna Systems, Lausanne, Switzerland

In this context, a one-dimensional acoustic transmission line, exhibiting metamaterial properties, is presented. It is composed of an acoustic waveguide, periodically loaded with membranes having the function of series capacitances, as well as transversally connected open channels ... En Savoir Plus

基于PDE接口推导的轴对称目标非轴对称激励的二维求解模型

卢笛 [1],
[1] 上海交通大学,上海,中国

在振动仿真中,网格量永远是考验工程师的重要问题,虽然计算机性能的提高可以解决一部分计算量问题,但这远远不够。一种有效的方式是进行二维计算,COMSOL Multiphysics® 中也有二维轴对称的几何维度,这极大地方便解决轴对称目标问题。但是由于空间维度的限制,只有当研究目标和其激励均为轴对称的情况才可以应用,这极大地限制了二维轴对称的应用。 在研究中,提出了一种针对二维轴对称目标的算法,以水下弹性结构声散射为例,建立了轴对称目标非轴对称载荷的模型。将需要三维建模计算的模型改为仅需要建立二维轴对称模型即可,大大降低了计算量。 在 COMSOL 的应用中 ... En Savoir Plus

FEM Analysis of Flamelet Wrinkling in a Diffusion Flame new

Y. Li[1], T.C. Lieuwen[2], J. Zhou[1], H. Cao[1]
[1]Zhengzhou University, Zhengzhou City, Henan Province, China
[2]Georgia Institute of Technology, Atlanta, GA

One can hardly get the exact analytic solution of a full time-dependent convection-diffusion equation, for describing the dynamics of a non-premixed flamelet. The analytic solution of the linearized form with such a model was studied by MATLAB®. And also, a numerical computation was made ... En Savoir Plus

Acoustic Scattering through a Circular Orifice in Low Mach Number Flow

S. Sack [1], M. Abom [1]
[1] KTH, the Royal Institute of Technology, Stockholm, Sweden

The acoustic scattering through a circular orifice plate in a duct with low Mach number flow (M=0.1) is computed using the Linearized Navier-Stokes physics interface of COMSOL Multiphysics®. The work by Kierkegaard et al. is extended to account for higher order acoustic modes, i.e., ... En Savoir Plus

旋转器结构单元尺寸对其工作带宽的影响

屈治国 [1], 张秀海 [1],
[1] 热流科学与工程教育部重点实验室,西安交通大学能动学院,西安,中国

超材料是一类具有天然材料所不具备的特殊性质的材料[1-3]。近年来,有学者开始研究超材料对波的旋转效应,这一研究有着工程应用价值。江雪等[4]设计并实验验证了一种声场旋转器。江雪等[5]进一步研究了声场旋转器整体尺寸大小对其工作带宽的影响及声场旋转器中心处的旋转角度与其结构单元长度的关系。但未见声场旋转器结构单元尺寸对其工作带宽影响的研究。 本文采用 COMSOL Multiphysics® 的声学模块和结构力学模块模拟图1的俯视二维结构,采用完美匹配层以获得更好的模拟结果。 本文模拟了5个声场旋转器在不同频率下的声场,发现随着长方体结构单元长宽比的增加 ... En Savoir Plus

Modeling and Simulation of Piezoelectric Materials for Comparison to Experimental Data

E. Nesvijski[1,2], R. Sahul[2]
[1]Western New England College, Springfield, MA, USA
[2]TRS Technologies, State College, PA, USA

Finite element analysis (FEA) is a modern tool for exploration of new horizons in science, technology and engineering. Different computer software such as ANSYS, ABACUS, PZFLEX and COMSOL Multiphysics® based on FEA are used for modeling and simulation of acoustic phenomena, for design of ... En Savoir Plus

RF NEMS Magnetoelectric Sensor Simulation and Demonstration

H. Lin [1], N. Sun [1], N. X. Sun [1],
[1] W.M. Keck Laboratory for Integrated Ferroics, ECE Department, Northeastern University, Boston, MA, USA

RF NEMS Magnetoelectric (ME) Sensor with a ferromagnetic (FeGaB)/ piezoelectric (AlN) thin film heterostructure is simulated, fabricated and measured in this work. To analyze the response of the ME structures, the coupling between the magnetic, elastic and electric field in the two ... En Savoir Plus