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 abrangem 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.

Infrasound Assessment of the Roller Compacted Concrete Dam: Case Study of the Portugues Dam in Ponce, PR

H. Diaz-Alvarez [1], V. P. Chiarito [1], S. McComas [1], M. H. McKenna [1],
[1] U.S. Army Engineer Research and Development Center, Vicksburg, MS, USA

The U.S. Army Corps of Engineers is currently investigating the use of infrasound sensors to monitor the health of structures of interest. Infrasound is low-frequency (2-20 Hz) acoustic energy and is capable of propagating many kilometers from the source structure. Large infrastructure, such as dams, bridges, and buildings emit such signals at their natural or driven frequencies of vibration, ...

Comparison of Magnetic Barkhausen Noise Tetrapole and Dipole Probe Designs

P. R. Underhill [1], T. W. Krause [1],
[1] Department of Physics, Royal Military College of Canada, Kingston, ON, Canada

COMSOL Multiphysics® software is used to understand the difference in behaviour of two Magnetic Barkhausen Noise (MBN) probes. The dipole probe has to be physically rotated to sample the angular distribution of the MBN. The tetrapole probe uses vector superposition to rotate the magnetic field without probe motion. Using the AC/DC Module and non-isotropic material properties, it was found that, ...

Evaluation of Binary Mixture Models for 3D Printed Biosensors

J. Persad [1], S. Rocke [1], D. Ringis [1], A. Abdool [1],
[1] Department of Electrical and Computer Engineering, University of the West Indies, St. Augustine, Trinidad and Tobago

3D printing as applied to the area of electronics manufacture covers a broad range of traditional printing technologies [1]. The attraction in 3D printing lies in its potential to disrupt the traditional photolithographic/subtractive manufacturing line with simpler additive processes. Additive electronics manufacturing which utilises 3D printing techniques allow for fewer production steps and ...

Time-Domain Model of the Inner Ear to Study Nonlinear Responses

K. Gladine [1], J. Soons [1], J. Dirckx [1]
[1] University of Antwerp, Belgium

The ear doesn’t solely listen but it also speaks. Sounds formed in the inner ear which are measurable in the outer ear are called Otoacoustic emissions (OAEs). Some claim these are produced by the outer hair cells (OHCs), the amplifiers in the inner ear. Our hypothesis is that the OHCs only amplify distortion products (DPs) but do not produce them.

Optimization of Microstructures Used in CMOS-MEMS Devices Based on a Topological Design Process

J. Mares-Carreño [1], G. S. Abarca-Jiménez [2], M. A. Reyes-Barranca [2],
[1] Escuela Superior de Ingeniería Mecánica y Eléctrica, Instituto Politécnico Nacional, Ciudad de Mexico, D.F., Mexico
[2] Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México, D.F., Mexico

The paper exhibits the process followed to obtain the geometry of a support for a MEMS inertial sensor by means of a topology optimization process. The SIMP method is used for the optimization process in which the objective is to obtain a support structure with a minimum rigidity expressed by a maximum allowed displacement in a stablished work direction. In the application of the SIMP method a ...

Predicting Degradation of a Composite Material Due to an Injected Current

J. Rivenc [1],
[1] Airbus Group Innovations, Toulouse Cedex, France

The purpose of this study is to predict, with a multiphysics model, the degradation area of a composite material when a current is injected into the material. The main physical phenomenon is an exothermic reaction, with an irreversible nonlinear variation of the electrical conductivity. The strategy is presented, in order to perform a computation that correctly takes the physics into account. In ...

Multiphysics Simulations for the Design of a Superconducting Magnet for Proton Therapy

C. Calzolaio [1], H. Carolin [1], S. Stephane [1],
[1] Paul Scherrer Institut, Villigen, Switzerland

The use of proton therapy for cancer treatment shows a growing trend, since the radiation dose delivered to the target volume is maximized and the dose to the surrounding healthy tissues is minimized. To direct the proton beam from all directions to the tumor in the patient, the last part of the beam transport system is mounted on a gantry rotating 360° around the patient. This system consists ...

Investigating the Loading Behaviour of Intact and Meniscectomy Knee Joints and the Impact on Surgical Decisions

M. S. Yeoman [1],
[1] Continuum Blue Ltd., Cardiff, United Kingdom

Knee joints are often subject to high loads, which can lead to injury, malalignment, and the progression of osteoarthritis in patients. To better understand the behavior, and the effect of meniscal damage and different meniscectomy repair approaches, a 3D structural mechanics model of a patient specific knee was developed in COMSOL Multiphysics®. The model made use of the Structural Mechanics ...

Accelerated Electrochemical Machining Tool Design

B. Skinn [1], T. Hall [1], S. Snyder [1], K. P. Rajurkar [2], E. J. Taylor [1]
[1] Faraday Technology, Inc., Clayton, OH, USA
[2] University of Nebraska, Lincoln, NE, USA

Electrochemical machining (ECM) is a manufacturing technology that allows metal to be precisely removed by electrochemical oxidation and dissolution into an electrolyte solution. ECM is suited for machining parts fabricated from “difficult to cut” materials and/or parts with complicated and intricate geometries. In ECM, the workpiece is the anode and the tool is the cathode in an electrochemical ...

COMSOL® Simulation of Blister Actuated Laser Induced Forward Transfer (Ba-LIFT)

M. Morales [1], , J. J. Moreno [1] , D. Munoz-Martin [1] , C. Molpeceres [1]
[1]Centro Láser UPM, Universidad Politécnica de Madrid, Madrid, Spain

Laser-induced forward transfer (LIFT) is a non-contact direct-write technique that enables the deposition of small volumes of material into user-defined high-resolution patterns with a wide range of structural and functional materials. There are many variations of the LIFT process, each differing in how the laser is absorbed and converted into the mechanical energy required for material ejection ...