科技论文和展示

这里您可以找到在全球 COMSOL 年会上所有用户报告的演示文稿。这些演示文稿介绍 COMSOL 用户是如何使用 COMSOL Multiphysics 进行创新性研究和产品设计。研究主题涵盖了包括电气、机械、流体和化工等范围广泛的行业和应用领域。请使用“快速搜索”来查找与您的研究领域相关的演示文稿。

Coupled Mechanical/Piezoelectric/Quantum Simulation of Strained Semiconductor InAs Quantum Dots (QD) Emitting at Long Wavelength

J. Even1, F. Doré1, C. Cornet1, L. Pedesseau1, A. Schliwa2, and D. Bimberg2
1FOTON/INSA, CNRS, Rennes, France
2Institut für Festkörperphysik, Technische Universität Berlin, Berlin, Germany

The eight-band k.p model of strained zincblende crystals has been extensively used to describe the electronic structure of III-V semiconductor nanostructures.in the present work, we propose to extend these approaches in order to provide a fast and easy method to evaluate the electronic spectra of narrow-gap semiconductor Quantum Dots.A complete 2D axi-symmetric model is proposed for the ...

Dipolar Plasma Source Modeling: A First Approach

S. Bechu, T. V. Tran, A. Lacoste, A. Bès, M. Rayar, and J. Pelletier
Laboratoire de Physique Subatomique et de Cosmologie Centre de Recherche Plasma, Matériaux-Nanostructures, Université J. Fourier, Grenoble, France

The simulation of plasma produced by a dipolar source requires a global, self consistent, modeling of its function. A first optimization of the dipolar source, magnetostatics, microwave propagation and fast electron trajectories (Particles in Cell (PIC) and Monte-Carlo hybrid method) have been performed with COMSOL Multiphysics and MATLAB.

Numerical Modeling of a Levitated Liquid in a Cold Crucible

R. Ernst, C. Garnier, P. Petitpas, and C. Trassy
SIMAP-EPM Laboratory (CNRS), Saint Martin d'Hères, France

The cold crucible is a useful tool for the elaboration of high purity materials by electromagnetic fields. The application areas range from titanium part elaboration, for the aeronautic industry or in medical prosthesis, to silicon purification for the photovoltaic industry. In this paper, the main results of a 3D electromagnetic model of a cold crucible from a former paper are briefly ...

Robust Design and Optimization of Thick Film Accelerometers in COMSOL Multiphysics with OptiY

H. Neubert1, A. Kamusella1, and T. Q. Pham2
1Institute of Electromechanical and Electronic Design, Technische Universität Dresden, Dresden, Germany
2OptiY e.K., Aschaffenburg, Germany

The optimization of design parameters with regard to tolerances is an important reason for design processing. We used a COMSOL Multiphysics structural mechanics model with the OptiY tool for finding an optimized design of a thick film accelerometer conforming to our sensitivity and cross sensitivity requirements, including resonance frequency. We calculated the probability of a system failure due ...

Using COMSOL Multiphysics for the Modelling of a Hybrid Linear Stepper Motor

R. Wislati, and H. Haase
Institut für Grundlagen der Elektrotechnik und Messtechnik, Leibniz Universität Hannover, Hannover, Germany

In this paper a 2-phase hybrid linear stepper motor (HLSM), also known as Sawyer linear motor, has been considered as a potential approach in Variable Valve Actuation (VVA) Systems for Internal Combustion Engines.Initially, the reluctance network approach (RNA) with lumped parameters has been used assuming an infinite permeability of the steel core. The results have then been compared with a ...

Using COMSOL Multiphysics for the Modelling of a Hybrid Linear Stepper Motor

R. Wislati, and H. Haase,
Leibniz University of Hanover, Germany

In this paper a 2-phase hybrid linear stepper motor (HLSM), also known as Sawyer linear motor, has been considered as a potential approach in Variable Valve Actuation (VVA) Systems for Internal Combustion Engines. Initially, the reluctance network approach (RNA) with lumped parameters has been used assuming an infinite permeability of the steel core. The results have then been compared with a ...

Parameter Extraction and Support-Loss in MEMS Resonators

Peter Steeneken
Project Leader
RF MEMS Research Group
NXP Semiconductors
Eindhoven, The Netherlands

In this paper it is shown how the equivalent circuit parameters of a MEMS resonator can be simply obtained from an eigenfrequency simulation. Additionally, it is demonstrated that the Q-factor as a result of support losses in a MEMS resonator can be determined using a matched boundary layer. The method is applied to calculate the frequency dependent admittance of a diamond disk resonator. Results ...

Thermal-mechanical Analysis of Concrete Structure Exposed to High Temperature

P. Kucera
Faculty of Safety Engineering, VSB-Technical University of Ostrava, Ostrava-Vyskovice, Czech Republic

The fire resistance of building structures is determined mostly by testing in an accredited laboratory. New findings have enabled the calculation of structural fire resistance. A progressive method of calculation of the fire resistance is also mentioned in the body of European standards. Calculation of the fire resistance demands determination of temperature distribution in the cross-section ...

A CFD Study of Active Chilled Beams for Indoor Air Conditioning

G. Cammarata, M. Iacono, L. Cammarata, and G. Petrone
Department of Industrial and Mechanical Engineering, University of Catania, Catania, Italy

In this study, fluid-dynamics and thermal performance of active-chilled beams are investigated through 2D and 3D modeling in COMSOL Multiphysics. Three different typologies of air conditioning systems are considered. Results, obtained for typical ranges of variation in operational conditions, are principally produced as temperature and velocity distributions.Special attention is paid to the ...

On the Use of COMSOL Multiphysics to Understand and Optimize the Filling Phase in the Injection and Micro-Injection Molding Process

M. Moguedet1, P. Namy2, and Y. Béreaux3
1Pôle Européen de Plasturgie, Bellignat, France
2SIMTEC, Grenoble, France
3LAMCOS, Site de Plasturgie, INSA Lyon, Bellignat, France

The work presented here deals with the simulation of the cavity filling stage of the injection and micro-injection molding process for thermoplastic materials.COMSOL Multiphysics gives us the means to take into consideration some other aspects usually neglected in commercial 3D softwares dedicated to polymer processing. In particular, tracking of the flow front is based on a Level Set approach. ...

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