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.

Towards Rotordynamic Analysis with COMSOL Multiphysics

M. Karlsson[1]
[1]ÅF, Stockholm, Sweden

In this paper a pre-study on using COMSOL Multiphysics for rotordynamic analysis is presented. It is concluded that it is possible to use COMSOL Multiphysics to perform rotordynamical analysis. However, there are no standard environment for rotordynamics, hence the user has to extend the structural model with the rotordynamics effect such as gyroscopic effect and rotordynamical coefficients. By ...

Design and Optimization of Highly Sensitive Single Axis Accelerometer using COMSOL Multiphysics®

Kunal A.Kshirsagar[1], K.Govardhan[1],
[1]VIT University, Sensor System Technology, School of Electronics Engineering, Vellore, Tamil Nadu, India
[2]VIT University, MEMS & Sensor Division, School of Electronics Engineering, Vellore, Tamil Nadu, India

Accelerometers are successfully commercialized MEMS devices. COMSOL Multiphysics® has been used in the modeling, simulation and optimizing of this design. The piezoresistive accelerometer is made up of a square proof mass with flexures supporting it. The piezoresistors are placed near the proof mass and frame ends of the flexure and the springs. There is an elongation or shortening of the ...

Thermomechanical Modeling of Dislocation Density Increase During PVT of SiC Crystals

D. Jauffrès [1], J. M. Dedulle [2], D. Chaussende [2], K. Ariyawong [2]
[1] Univ. Grenoble Alpes, LMGP, SIMAP, CNRS, Grenoble, France
[2] Univ. Grenoble Alpes, LMGP, CNRS, Grenoble, France

During Physical Vapor Transport (PVT) growth of single 4H-SiC crystal and subsequent cooling down, thermal stresses lead to the multiplication of dislocations that are non-desirable for the semiconductor applications of this material. These dislocations induced by thermal stresses could be reduced by an appropriate control of the thermal gradients inside du crystal during its growth and cooling ...

Developing Solutions to Tonal Noise from Wind Turbines Using COMSOL Multiphysics® Software

J. M. Stauber [1], B. A. Marmo [1],
[1] Xi Engineering Ltd, Edinburgh, United Kingdom

Tonal noise from wind turbines can have effects on neighboring residences and its emission can result in strong regulatory penalties that can include the closure of wind farms. The authors present a model of a new broadband damping approach where containers filled with EniDamp™, an Advance Particle Damping (APD) material. The containers, so-called APD pods, are magnetically fixed to wind ...

Design of a Pressure Sensor to Monitor Teeth Grinding

I.M. Abdel-Motaleb[1], K. Ravanasa[1], K.J. Soderholm[2]
[1]Department of Electrical Engineering, Northern Illinois University, DeKalb, IL, USA
[2]Department of Restorative Dental Sciences, College of Dentistry, University of Florida, Gainesville, FL USA

Studying teeth grinding behavior and other oral conditions requires the ability to accurately measure the pressure on the teeth. Placing a sensor in the mouth requires small size devices with powering and measurement techniques that do not hinder the normal life of the patient. To meet these requirements, we designed, using COMSOL, a small, easy to read MEMS capacitive force sensor, with ...

A COMSOL Multiphysics® Software Analysis of Beam Tube Cooling in the High Flux Isotope Reactor of ORNL

J. D. Freels [1],
[1] Research Reactors Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA

Previous to the present work, a formal calculation was approved [1,2] to support the operation of the High Flux Isotope Reactor (HFIR) Horizontal Beam-Tube 1 of 4 (HB-1). The present calculation [3,4] repeats the previous work using COMSOL Multiphysics® software and extends the analysis to cover a broader range of coolant flow. In addition, this new calculation expands the analysis much further ...

Modeling the Temperature-Dependent Dynamic Behavior of a Timber Bridge with Asphalt Pavement

B. Weber[1]
[1]Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland

The fundamental frequency and the corresponding damping value are the main design parameters for footbridges against excessive vibrations induced by pedestrians. Since pedestrians typically walk at a pace of 1.6–2.4 Hz, this frequency range as well as the range of the second harmonic, namely 3.5–4.5 Hz, should be avoided. However it has been observed that the fundamental frequency of a bridge ...

Modeling of the Photo-Mechanical Response of Liquid-Crystal Elastomers

G. Cerretti[1], J.-C. Gomez-Lavocat[1][2], K. Vynck[1], D.S. Wiersma[1][3]
[1]European Laboratory for Non-Linear Spectroscopy (LENS), University of Florence, Sesto Fiorentino, Italy
[2]The Institute of Photonic Sciences (ICFO), Mediterranean Technology Park, Castelldefels, Spain
[3]Istituto Nazionale di Ottica (INO), National Research Council (CNR), Florence, Italy

Liquid-crystal elastomers (LCEs) [1] have attracted a great attention in recent years due to their high potential in a wide range of applications, from microfluidics components [2] to artificial muscles [3]. The photo-mechanical response of LCEs is due to their constitutive photo-sensitive molecules, which change shape when absorbing part of the incident light. These microscopic deformations can ...

A Coupled Thermal, Chemical and Mechanical Model using COMSOL Multiphysics® Software

Xiang Sun [1], Hao Luo [2], Xiaoxia Guo [1], Yuelang Jin [3], Tingting Luo [1]
[1] Dalian University of Technology, Dalian, China
[2] University of Cambridge, Cambridge, UK
[3] Tongji University, Shanghai, China

Many numerical coupling thermo-hydro-mechanical-chemical models for methane hydrate bearing sediments(MHBS) have been proposed to analyze the mechanical behavior of MHBS during methane gas production. However, most of them are based on finite differential method (FDM) or finite volume method (FVM). Few models for MHBS based on finite element method (FEM) and Galerkin variation principle are ...

用于TRISO燃料颗粒性能多物理场耦合分析的COMSOL模型

李伟 [1],
[1] 中国核动力研究设计院,成都,中国

TRISO(TRistructure ISOtropic)燃料颗粒不仅是在役高温气冷堆燃料元件的核心部件,同时也是下一代用于水冷反应堆的全陶瓷微密封(FCM)耐事故燃料(ATF)元件的关键组成部分。TRISO燃料颗粒由内核部分和包覆层两部分组成,其中内核部分包括球形UO2或UN燃料核芯和包围核芯的疏松热解碳缓冲层,包覆层由内向外依次为内致密热解碳层(IPyC层)、碳化硅层(SiC层)和外致密热解碳层(OPyC层)。基于COMSOL Multiphysics®多物理场耦合有限元软件开发了TRISO燃料颗粒的三维热学-力学-裂变产物扩散耦合分析模型,详细考虑了材料物性参数随温度、快中子注量、各向异性系数和燃耗等因素的变化,热膨胀,燃料核芯的密实和肿胀,Buffer层、IPyC层和OPyC层辐照变形,SiC层、IPyC层和OPyC层辐照蠕变,Buffer层与IPyC层之间的间隙导热 ...