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.

The Use of CFD to Simulate Turbulent Flows in Laboratory and Full Scale Flocculation Processes

A.H. Ito[1], O.T. Kaminata [1], S.R. Lautenschlager[1]
[1]State University of Maringá, Maringá, Paraná, Brazil

The hydraulic flocculates are employed in water treatment plants (WTPs), but may present problems during the mixing stage reducing the efficiency of treatment. In this context modeling of a hydraulic flocculate using COMSOL and a 1:10 scale model of the Maringá-PR Brazil city WTP flocculate was done. The WTP flocculate is shown in figure 1 and the model illustrating the acrylic flocculate ...

Parametric Study of Electrolyte-Supported Planar Button Solid Oxide Fuel Cell

A. Aman[1], R. Gentile[1], Y. Xu[1], N. Orlovskaya[1]
[1]Department of Mechanical, Materials and Aerospace Engineering, University of Central Florida, Orlando, FL, USA

Fuel cells are devices that convert chemical energy of a fuel into electrical energy through electrochemical processes. One of the types of fuel cell is the Solid Oxide Fuel Cell (SOFC) that uses solid ceramics for electrolytes. Numerical simulation involves constructing a mathematical model of the SOFC and use of specifically designed software programs that allows the user to manipulate the ...

3D Hydrogeological Modeling - From a Theoretical 2D Model through a Medium Scale Application up to a Challenge: Simulations at Basin Scale

E. Cavalli[1], R. Simonetti[1], M. Gorla[1], N. Ceresa[1]
[1]CAP Holding, Milan, Italy

An alluvial aquifer system has probably conceived as a numerical modeling hell. We have chosen COMSOL Multiphysics® for two reasons: 1) FEM methods allow to use complex geometries; 2) multiphysics simulation permits to run a single model with all phenomena. We built a section with these physics: a) Darcy's law, b) Richards' equation, c) ALE to show surface deformation, d) Hydrogeologcal ...

Optimal Design of Flow Distributors for Detecting Blocked Microreactors

Osamu TONOMURA[1]
[1]Kyoto University, Kyoto, Kyoto, Japan

When the production capacity of micro chemical plants is increased by numbering-up approach, it is important to realize the uniform flow distribution among the parallelized microreactors. In addition, a blocked microreactor needs to be identified as early as possible to achieve the stable long-term operation of micro chemical plants. In this research, a system that can detect a blocked reactor by ...

AC Loss Computation of Single Isolated Superconducting Tapes

Batdalai SUKH et al.[1]

[1]Miyakonojo National College of Technology, Miyakonojo, Miyazaki, Japan

In this panel session we present numerical models for computing the current density, field distribution and AC losses in high-temperature superconducting tapes. The tapes have a rectangle cross section for two-dimensional geometries. The numerical models are tested by comparing the calculation results with the predictions of analytic solutions for simple geometries. We used it successively for ...

Analysis of Optical Manipulation of a Metallic Nanowire using COMSOL Multiphysics®

Ryota OZAWA et al.[1]

[1]Yokohama National University, Yokohama, Kanagawa, Japan

We have developed optically driven micropumps by manipulating microstructures using optical tweezers. In this study, we proposed and developed a novel manipulation method of a single metallic nanowire. In this method, dynamic optical vortex is used not only for manipulating a metallic nanowire in the focal plane, but also for grasping it along the optical axis. This method will be used for ...

Modelling of Heat and Moisture Transport in a Corrugated Board Stack - new

M. Xynou[1]
[1]KTH Royal Institute of Technology, Stockholm, Sweden

Corrugated board is produced on a machine where the corrugated medium is glued between two flat paper surfaces, the liners. The board is cut into sheets and stored in a stack until suitable moisture content has been reached. The sheets are then cut and creased into blanks for the production of boxes and other products. If the moisture content is too high, there is a risk for cutting problems in ...

Sensitivity Analysis for High Temperature Proton Exchange Membrane Fuel Cell - new

A. Lele[1], N. Lodha[1], R. Srivastava[1], U. Bipinlal[1], A. Pandey[2], A. Paul[3]
[1]CSIR - National Chemical Laboratory, Pune, Maharashtra, India
[2]Reliance Industries Ltd., Reliance Technology Group, Navi Mumbai, Maharashtra, India
[3]CSIR - Central Electrochemical Research Institute, Chennai, Tamil Nadu, India

A Proton Exchange Membrane Fuel Cell (PEMFC) is an electrochemical device, which converts a part of heat from the formation of water into electricity. Each cell has a Membrane-Electrode Assembly (MEA) which is placed between two electrically conducting plates having gas flow channels. An MEA is made of a solid proton-conducting electrolyte sandwiched between two electrodes (anode and cathode). ...

Design and Strain Analysis of Artificial Femoral Head and Stem

N. M. Sundaram[1], M. Sneha[1], A. Kandaswamy[1], R. Nithya[2]
[1]PSG College of Technology, Coimbatore, Tamil Nadu, India
[2]Dr. N.G.P. Institute of Technology, Coimbatore, Tamil Nadu, India

The majority of elderly patients are subjected to hip bone replacement due to dislocation of bone, mechanical failure and infection. The life time of the implant varies from patient to patient depending on their daily physical activity. Once the implant fails, re-operation of hip bone replacement is performed. In United States, there are approximately 18 revision hip replacements performed for ...

Investigation on MEMS Based Thermal Sensor for Cancer Detection

A. V. Lakshmi[1], K. C. Devi[1]
[1]PSG College of Technology, Coimbatore, Tamil Nadu, India

This paper presents the design and simulation of a thermal sensor using COMSOL Multiphysics® software for the detection of low body temperature syndrome which can allow the early detection of cancer. This sensor is made of an alloy consisting of two materials with different coefficients of thermal expansion. The main objective of this work is to investigate the structural change in the sensor ...

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