Artigos Técnicos e Apresentações

Aqui você encontrará apresentações realizadas nas Conferências de Usuários COMSOL de todo o mundo. As apresentações englobam pesquisas e produtos inovadores feitas por engenheiros e cientistas usando o COMSOL Multiphysics. Os tópicos abramgem uma grande gama de indústrias e aplicações, como elétrica, mecânica, escoamento e química. Use a função de busca "Quick Search" para encontrar apresentações na sua área de interesse.

Optimization of a Thermal Actuator for Low Power/Low Cost Applications

R. Zúñiga-Quesada[1], M. Vílchez-Monge[1], P. Vega-Castillo[1]
[1]Instituto Tecnológico de Costa Rica, Cartago, Costa Rica

This work describes the study of a thermal actuator and modifications to the materials employed in order to decrease power consumption and implementation costs. For this study, we worked on improving the thermal actuator described in the work of T. Ebefors. The criteria for choosing the new materials were lower power consumption, commercial availability, and ease processing. The thermal actuator ...

Control of Preheating Process of Casting Die as Distributed Parameter System

C. Belavý[1], G. Hulkó[1], K. Ondrejkovic[1], and P. Zajícek[1]
[1]Institute of Automation, Measurement and Applied Informatics, Faculty of Mechanical Engineering, Slovak University of Technology in Bratislava, Bratislava, Slovak Republic

In the paper distributed parameter system models in the form of lumped-input/distributed-output systems are introduced and modeling of temperature fields of the die in the benchmark casting plant is presented. Temperature fields were modeled and studied using a finite element method based software package COMSOL Multiphysics and numerical models in the form of a lumped-input/distributed-output ...

Dependence of Potential and Ion Distribution on Electrokinetic Radius in Infinite and Finite-length Nano-channels

J. Schiffbauer[1], J. Fernandez[2], W. Booth[1], K. Kelly[3], A. Timperman[3], and B. Edwards[1]
[1]Physics Dept. West Virginia University, Morgantown, WV, USA
[2]Chemical Engineering Dept,West Virginia University, Morgantown, WV, USA
[3]Dept. of Chemistry, West Virginia University, Morgantown, WV, USA

A site-binding/dissociation model is used to determine surface charge in numerical studies of the equilibrium potential and ion distributions inside infinite and finite-length nano-channels. This COMSOL model allows us to investigate the response of surface (zeta) potential to environmental parameters such as reservoir salt concentration, solution pH and wall separation. The resulting ion and ...

Application of Solution Mapping to Reduce Computational Time in Actively Cooled Power Electronics

K. Lowe [1,2], and Rao V. Arimilli[2]
[1]Oak Ridge National Laboratory, Oak Ridge, TN, USA
[2]Department of Mechanical, Aerospace, and Biomedical Engineering, University of Tennessee, Knoxville, TN, USA

In some power electronic applications the available coolant temperature is close to maximum and controlling operating temperature becomes more challenging, for which new thermal management schemes must be considered. COMSOL predicts the 3D fluid behavior and 3D temperature distribution within an actively cooled power electronic structure. A solution mapping method is implemented to more ...

Numerical Modelling of Electrophoresis Applied to Restoration of Archaeological Organic Materials

J. Caire[1], A. Bouh[1], and E. Guilminot[2]
[1]LEPMI, UMR 5631, INPG - CNRS, Saint Martin d’Hères, France
[2]EPCC, Arc'Antique, Nantes, France

Restoration of archaeological materials from oceans is a major activity of Arc’ Antique. Organic materials such as wood, tissues, leathers, papers and ceramics found in sea water are always impregnated with salts. Rinsing such archaeological objects with pure water to extract the salts takes too long, so electrophoresis was used to improve the salt extraction. The objective of this ...

COMSOL Multiphysics – Fuel Cell and LED applications

C-H. Cheng
National Central University, Chungli, Taiwan

Dr. Chin-Hsien Cheng received his PhD. Degree in National Tsing-Hua University, Taiwan in 2007. He joined Institute for Integrated Energy Systems, University of Victoria, Canada as a post-doctoral fellow until Aug. 2009. Currently, he is a research associate and lab manager of the Modeling and Simulation Lab. in the Fuel Cell Center, Yuan-Ze University. Dr. Cheng has been work in the field of ...

The initial simulation on characteristic of lithium ion cells using COMSOL soft

X. Liu, S. Wang, and L. Lu
Tianjin Institute of Power Source, Beijing, China

Tianjin Institute of Power Source (TIPS) is the first, the largest and most complete electrical energy technology research institute of China. We use COMSOL Multiphysics to simulate the lithium-ion batteries. It contains: Simulation on charge-discharge behavior of lithium ion cells; Simulation on thermal and safety of lithium ion cells; Design for lithium ion cells – collector, stress; From ...

Control of Technological and Production Processes Modeled by COMSOL Multiphysics as Distributed Parameter Systems

G. Hulkó, C. Belavý, G. Takács, and P. Zajíček
Slovak Technical University in Bratislava, Bratislava, Slovakia

COMSOL Multiphysics is widely utilized in the modeling of dynamics of technological and manufacturing processes. At the same time the investigated technological and manufacturing processes are generally described by systems of partial differential equations as distributed parameter systems. This paper presents actual possibilities of control of systems modeled by COMSOL Multiphysics as ...

Blistering of Industrial Floors on Concrete Substrate: The Role of Air Overpressure

P. Devillers[1], S.V. Aher[2], G. Fau[3], B. Tranain[3], and C. Buisson[1]
[1]Centre des Matériaux de Grande Diffusion, Ecole des Mines d’Alès, France
[2]Department of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
[3]Centre Scientifique et Technique du Bâtiment, Champs sur Marne, France

A three dimensional COMSOL Multiphysics, transient analysis, diffusion model has been adopted to model the transfers of water in the industrial concrete floors. To take into account the different initial saturation levels at the different levels of the slab, the model is divided into three subdomains. The rise of the waterfront is also simulated and the air overpressure thereby developed at the ...

ComsolGrid – A Framework For Performing Large-Scale Parameter Studies Using COMSOL Multiphysics and Berkeley Open Infrastructure for Network Computing (BOINC)

C.B. Ries, and C. Schröder
University of Applied Sciences Bielefeld, Germany

BOINC (Berkeley Open Infrastructure for Network Computing) is an open-source framework for solving large-scale and complex computational problems by means of public resource computing (PRC). In contrast to massive parallel computing, PRC applications are distributed onto a large number of heterogeneous client computers connected by the Internet where each computer is assigned an individual task ...

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