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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.
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翅片式声子晶体隔声性能的数值模拟

张秀海 [1], 屈治国 [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

引言声子晶体是一类结构或物理参数周期变化的材料，可以用来调控声波的传播。声子晶体在波导、隔声、吸声等领域具有潜在的应用。除此之外，研究学者还发现声子晶体具有一些新颖的功能，如负折射、负弹性模量、负质量密度等。受翅片式结构启发，本文设计了翅片式声子晶体（PCFs），并通过数值模拟研究了该类声子晶体的隔声性能。 COMSOL MULTIPHYSICS® 的使用模拟中采用COMSOL Multiphysics的声学模块和结构力学模块，采用完美匹配层以获得更好的模拟结果。结果本文模拟了翅片式声子晶体在6300 Hz时的声压场，并计算了传递损失 ... En Savoir Plus

海底管线周围流场分析

叶智慧 [1], 宁禹强 [1], 陈冬 [1], 张佳亮 [1],
[1] 中国石油大学（北京）

海洋油气开采的过程中，油气在海底通过海底管线进行运输。当雷诺数改变时，海底管线周围的流场也会相应发生改变，因此研究管线周围流场分布对分析管线受力情况至关重要。本文研究了海底管道在层流和紊流的情况下，不同流速，不同的床面粗糙度以及不同位置海底管线等情况进行了建模和分析，绘制了不同情况下流场分布图。计算结果表明：（1）同一位置，不同流速下，海流绕流管线形成的流场不同，当流速超过某一限定值后，会出现涡流。（2）不同位置，相同速度下，海流绕流管线形成的流场有所不同。通过数值模拟，对不同情况下的管线受力情况有了清晰的认识，对工程实际操作可以起到指导作用。关键词：海底管线；海流力 ... En Savoir Plus

3D Optical Human Eye Model Based on COMSOL Multiphysics® to Provide a Test Bench for Laser Surgery

S. Regal [1], R. Delattre [1], M. Ramuz [1],
[1] Department of Flexible Electronics, Ecole Nationale Supérieure des Mines, Centre Microélectronique de Provence CMP-EMSE, MOC, Gardanne, France

We present here the development of an optical human eye model – based on Ray Optics module in order to reproduce the eye optical properties. Current simulations in literature do not fully cover the light propagation inside all parts of the eye by taking into account the absorption but ... En Savoir Plus

Ultrasound Pressure Field of a Resonating Piezoelectric Membrane with Three Excitation Electrodes

V. Tzanov [1], E. Ledesma [1], F. Torres [1], N. Barniol [1],
[1] Universitat Autonoma de Barcelona, Spain

Micromachined ultrasound transducers can work as a sensor or actuator for measuring fluid speed and direction, mixing and exciting particles (sonication), taking images (ultrasonography), non-destructive testing and many other purposes in various fields. In this work, a COMSOL ... En Savoir Plus

Solar Radiation Effects on the Epoxy Adhesive Temperature Used to Bond CFRP to Concrete Beams

M. Breveglieri [1], B. Weber [1], C. Czaderski [1],
[1] EMPA - Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland

The service temperature of epoxy-based adhesive used for structural strengthening of civil structures such as road bridges is an important issue and has to be taken into account when, for example, bonded CFRPs(Carbon Fiber Reinforced Polymer) strips are exposed to solar radiation and ... En Savoir Plus

PCCP Profiling and Tube Wave Analysis of WRE Signal

N. Chowdhury[1], Z. Liao[2], and L. Zhao[1]
[1]Department of Electrical & Computer Engineering, Ryerson University, Toronto, ON, Canada
[2]Department of Architectural Science, Ryerson University, Toronto, ON, Canada

Acoustic wave propagation due to the breakage or slippage of reinforced wire in water-filled prestressed concrete cylinder pipe (PCCP) attracts interest in non-destructive pipe testing. Current practice of acoustic emission (AE) detection and wire-break related events (WRE) recognition ... En Savoir Plus

Helium Two-Phase Flow in a Thermosiphon Open Loop

Bertrand Baudouy
Head of the Cryogenics R&D Group, CEA Saclay, France

Outline of presentation: Missions of SACM (Accelerator, Cryogenics and Magnetism Division) Context : The Large Hadron collider at CERN, Geneva Cooling large superconducting magnet Thermosiphon open loops for cooling superconducting magnets Experimental facility and ranges of the ... En Savoir Plus

COMSOL Multiphysics^® Version 4

Svante Littmarck
President and CEO, COMSOL

Svante Littmarck is the CEO of the COMSOL group. He co-founded COMSOL in 1986. He holds a M.Sc. in Applied Mathematics from the Royal Institute of Technology in Stockholm. In 2004 he received an honorary doctoral degree from the Royal Institute of Technology. En Savoir Plus

Streamer Propagation in a Point-to-Plane Geometry

M. Quast[1] and N.R. Lalic[1]
[1]Gunytronic GmbH, St Valentin, Germany

Corona discharge is used in several applications such as surface treatment of polymers, photocopying or dust removal in air conditioning. Streamer formation is undesirable for most of these applications. Therefore, several studies have been dedicated to investigate the formation and ... En Savoir Plus

Analysis of Multiconductor Quasi-TEM Transmission Lines and Multimode Waveguides

S.M. Musa[1], M.N.O. Sadiku[1], and O.D. Momoh[2]
[1]Prairie View A&M University, Prairie View, TX, USA
[2]Indiana University-Purdue University, Fort Wayne, IN, USA

This paper presents an analysis approach of multicondcutor quasi-TEM lines transmission interconnect in a single dielectric region and multimode waveguides using the finite element method (FEM). FEM is especially suitable and effective for the computation of electromagnetic fields in ... En Savoir Plus

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