Artigos Técnicos e Apresentações

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.

FSI for Coolant Flow in Research-type Nuclear Reactors

F. Curtis[1], K. Ekici[1], and J. Freels[2]
[1]University of Tennessee, Knoxville, TN
[2]Oak Ridge National Lab, Oak Ridge, TN

The High Flux Isotope Reactor, located at the Oak Ridge National Laboratory, is scheduled to undergo a conversion of the fuel used and this proposed change requires an extensive analysis of the flow through the reactor core. The core consists of approximately 500 very thin and long fuel plates through which the coolant (water) flows at a very high rate. Therefore, the design and the flow ...

Modeling Cavity Growth in Underground Coal Gasification

A. Sarraf Shirazi, J. Mmbaga, and R. Gupta
University of Alberta
Edmonton, AB

Underground coal gasification (UCG) has received renewed interest due to its potential for utilization of the vast amounts of coals available in deep underground seams and the current drive towards clean coal utilization. UCG process involves the reaction between air/steam and coal in deep underground seams to form a combustible gas which is brought to surface via a production well and used as a ...

Optimization of Design Parameters of a Novel MEMS Strain Sensor used for Structural Health Monitoring of Highway Bridges

H. Saboonchi, and D. Ozevin
Civil Engineering Department
University of Illinois at Chicago
Chicago, IL

The novel Micro Electro Mechanical System (MEMS) based Piezoresistive stain sensor is presented in this paper. The main goal of this sensor is to monitor the localized strain in the highway bridges especially near the crack tips. Monitoring the crack growth on the bridges can lead to early detection and prevention of bridge failures. The COMSOL Multiphysics software was used to optimize the ...

Finite Element Analysis of Integrated Circuit Interconnect Lines on Lossy Silicon Substrate

S. Musa[1], M. Sadiku[1], and A. Emam[2]

[1]Roy G. Perry College of Engineering, Prairie View A&M University, Prairie View, TX
[2]Information Systems Department, King Saud University, Riyadh, Saudi Arabia

The silicon substrate has a significant effect on the inductance parameter of a lossy interconnect line on an integrated circuit. It is essential to take this into account in determining the transmission line electrical parameters. In this paper, a new quasi-TEM capacitance and inductance analysis of multiconductor multilayer interconnects is successfully demonstrated using the finite element ...

Study of Hard-and Soft- Magnetorheological Elastomers (MRE’s) Actuation Capabilities

J. Roche[1], P. Von Lockette[1], and S. Lofland[2]
[1]Mechanical Engineering Dept., Rowan University, Glassboro, NJ
[2]Physics and Astronomy Dept., Rowan University, Glassboro, NJ

In this study, magneto-rheological elastomer (MRE) composite beams made of Barium hexaferrite (BaM) and Iron (Fe) powders combined with a highly-compliant matrix material were simulated using COMSOL\'s Solid Mechanics and AC/DC modules. The goal of the work was to develop models capable of predicting the actuation behavior of hard- and soft-magnetic MREs. This work simulates the bending of the ...

Analysis of Microwave Radiation for Heating

J. Crompton, S. Yushanov, L. Gritter, and K. Koppenhoefer
AltaSim Technologies, LLC.
Columbus, OH

Microwave heating is an important process for many commercial, industrial and household applications. In microwave heating applications, the energy is introduced directly into the volume of the material. As a consequence the quality of the process is highly dependent on the uniformity of the electromagnetic field distribution. Thus, developing a uniform electromagnetic field inside the ...

Simulations of MEMS Based Piezoresistive Accelerometer Designs in COMSOL

N. Bhalla[1], S. Li[2], and D. Chung[1]
[1]Chung Yuan Christian University, Taiwan, (R.O.C)
[2]National Tsing Hua University, Taiwan, (R.O.C)

Different configurations of MEMS based accelerometer has been made and analysed using COMSOL Multiphysics. The designs presented in this paper consist of a square shaped proof mass with flexures supporting it. Different position and varied number of supporting flexures attached to the proof mass makes each configuration distinct. The piezoresistors are placed near the proof mass and frame ends on ...

Ferromagnetic Materials for MEMS- and NEMS-Devices

A. Weddemann, J. Jadidian, S. Khushrushahi, Y. Kim, and M. Zahn
Research Laboratory of Electronics
Massachusetts Institute of Technology
Cambridge MA

The modeling of ferromagnetic materials is a challenging task of high industrial and academic impact. Thin film and granular systems form the basis of novel spintronic devices such as modern hard drives with a high data area storage density. In order to push the current limits even further and to design more efficient devices, a strong understanding of the governing dynamics is required. We ...

MEMS-Based Microdroplet Generation with Integrated Sensing

P. Ben-Tzvi, and W. Rone
George Washington University
Washington, DC

This paper presents model development and simulation results for a microdroplet generator capable of internally measuring the volume of dispensed droplets. The system’s integrated sensing is enabled by storing compressible gas adjacent to the dispenser’s liquid reservoir. During actuation, the net change in the compressible gas pressure is correlated to the ejected droplet volume. To ...

Large Scale Simulation on Clusters Using COMSOL

D. Pepper[1], X. Wang[2], S. Senator[3], J. Lombardo[4], and D. Carrington[5]
[5]T-3 LANL

Darrell Pepper is Professor of Mechanical Engineering and Director of the Nevada Center for Advanced Computational Methods at the University of Nevada Las Vegas (UNLV). He was recently appointed Distinguished Visiting Professor at the US Air Force Academy where he will be in residence until May 2012. In 2004, Dr. Pepper was appointed ASME Congressional Fellow and worked as a senior legislative ...

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