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。

Thermal and Laminar-Fluidic Workbench for a metric Portion of a Gun

M. Brun
Nexter Systems, Versailles, France

Part of a 120mm gun has been represented as a perforated conic iron solid, surrounded by an annular screen. Inside the gun are limit conditions of isolation or thermal flux. The screen is described as a shell, receiving solar heat and exchanging with the outside atmosphere. It bears a defined number of holes on its top and bottom lines, maintaining semi-captive air between itself and the gun. The ...

A General Method for Solving Equations - The Dynamical Functional Particle Method

M. Gulliksson, and S. Edvardsson
Mid Sweden University, Sundsvall, Sweden

Given any equation L(u)=0, e.g. a partial differential equation, it can be considered to be the stationary solution of a time dependent equation (in fact, time need only to be fictitious time not real time). Our approach is to choose the time dependence in analogy with an oscillating particle system including damping in order to damp out the time derivatives and attain a stationary solution ...

Solid Target Cooling for High Power Neutrino Super Beam

B. Lepers, and C. Bobeth
IPHC, CNRS, Strasbourg, France

The feasibility of water cooling is investigated for a solid target which is integrated as the inner conductor in a magnetic horn for secondary particle focusing (pi; K) as used in conventional neutrino beam accelerator experiment. A simple axi-symmetric thermal model calculated in COMSOL is used to obtain the temperature distribution inside the target for different values of h; power beam and ...

Simplifying A Model Of Short Subsequent Sections Containing A Common Detailed Cross-Section

J. Krah
AkerSolutions, Fornebu, Norway

In COMSOL Multiphysics it is possible to implement and simulate several independent models in parallel. This can be meaningful when the different models are coupled to each other by some kind of interaction. If a part of the geometries is identical in all models, this part can be reduced in that it is implemented in only one of the geometries. In the other geometries only its solution towards its ...

Experimental and Numerical Fluid Flows Study on a X-Millichannel

C. Wolluschek[1], F. Etcheverry[2], M. Cachile[2], and J. Gomba[3]
[1]Mecánica de Fluidos e Ingeniería Térmica, Centro tecnológico Cemitec, Noáin, Navarra, Spain
[2]Grupo de Medios Porosos, Facultad de Ingeniería, UBA, Buenos Aires, Argentina
[3]Instituto de Física Arroyo Seco, UNCPBA, Tandil, Argentina.

In this work, a COMSOL model that predicts velocity and concentration fields inside an X-shaped millichannel (4 mm diameter) is developed. Water and a ink low concentration are injected simultaneously in the two inlets of the device. The mass transfer problem is solved by a Fickian model (solute concentration is low compared with the solvent). The parameters in this study are: initial inlet mass ...

COMSOL Assistance for the Modeling of Cellular Microsystems

J. Berthier
CEA-LETI-Minatec
Grenoble, France

The developments of microsystems for biotechnology have been fast in the last few years, and no sign of slowing down is observed. It has begun with lab-on-chip for genomics, especially for the recognition of DNA sequences, followed by protein reactors and immunoassays, and today the emphasis is on cellomics. Cell-chips are design to monitor the behavior of cells, individually or as a group, ...

3D FEM-analysis of a Micromachined Wind Sensor Based on a Self-heated Thermistor Array

A. Talic[1], S. Cerimovic[2], M. Mutapcic[2], R. Beigelbeck[1], and F. Keplinger[2]
[1]Institute for Integrated Sensor Systems, Austrian Academy of Sciences, Wiener Neustadt, Austria
[2]Institute of Sensor and Actuator Systems, Vienna University of Technology, Vienna, Austria

We present COMSOL-based analyses and design optimizations of a micromachined wind sensor. The sensor relies on eight germanium thermistors embedded in a thin silicon nitride membrane, where two orthogonally arranged ensembles, each consisting of four thermistors, are connected to form a double Wheatstone-bridge. In operation, each bridge is supplied by a constant current and the self-heating of ...

Advanced Application of an Automated Generative Tool for MEMS Based on COMSOL Multiphysics

F. Bolognini
University of Cambridge
Cambridge, UK

This work presents a different use of COMSOL as an integrated component of a computational tool framework used to automate designs creation. CNS-Burst is a computational synthesis method that has been implemented with the aim of automatically generating solutions to an assigned design task. COMSOL is integrated in the method and used to evaluate the performance of the design solutions found. ...

FEM Simulations on the Effect of the Thermal-induced Surface Stress on Ultrathin Resonators

V. Pini, J. J. Ruz Martinez, E. Gil, M. Calleja, and J. Tamayo
Instituto de Microelectrónica de Madri
IMM-CNM (CSIC)
Madrid, Spain

The detection back-action phenomenon has received little attention in physical, chemical, and biological sensors based on nanomechanical systems. We show that this effect is very significant in ultrathin bimetallic cantilevers, in which the laser beam that probes the picometer scale vibration largely modifies the resonant frequencies of the system. The light back-action effect is nonlinear, ...

Development of Mathematical Model for Determining Sound Reduction Index of Building Elements

J. Ratnieks, A. Jakovics, and J. Klavins
University of Latvia
Riga, Latvia

Although we know the physics inside a media where the sound waves propagate, determination of material\'s or structure\'s sound reduction index is not an easy task. The lack of good engineering solutions proves the point. The only reliable way to calculate the sound reduction index is to carry out an experiment.Therefore, the aim of this study is to develop a mathematical model that can ...

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