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.

Analysis of an Inductive Proximity Sensor

A. Frey [1], I. Kuehne [2], R. Großmann [1], T. Frommelt [1], L. Fromme [3], T. Koch [4],
[1] Augsburg University of Applied Sciences, Augsburg, Bavaria, Germany
[2] Heilbronn University, Heilbronn, Germany
[3] Bielefeld University of Applied Sciences, Bielefeld, Germany
[4] COMSOL Multiphysics GmbH, Göttingen, Germany

Today, 90 percent of automation sensors are binary proximity detectors. Besides capacitive and optical types, inductive proximity sensors are essential for industrial applications. Compared to their mechanical counterparts, they offer almost ideal properties as contact-free and wear-free working principle as well as high switching frequency and precision. Inductive sensors cover a detection ...

Frequency Response Analysis of a Printed Circuit Board

S. Mathmann[1]
[1]University of Applied Sciences Bielefeld, Department of Engineering Sciences and Mathematics, Bielefeld, Germany

During a practical course the students compare the measured frequency response of an assembled PCB (Printed Circuit Board) with the simulated data out of COMSOL Multiphysics® software. For this the whole PCB with all components are feed in the simulator and afterwards an eigenfrequency-analysis is carried out. To simplify the effort to do this, a COMSOL® app was created. As result the user ...

The Effect of Eccentricity in Fully Developed Annular Pipe Flow on Convection Heat Transfer and the Darcy Friction Factor

S. Rabbani [1], A. Elzawawy [1], J. D'Arrigo [1], J. D. Freels [2]
[1] Vaughn College of Aeronautics and Technology, New York, NY, USA
[2] Oak Ridge National Laboratory, Oak Ridge, TN, USA

Eccentricity in annular channels contributes to changes in fluid flow characteristics which in turn, affects the performance and integrity of the configuration. This research investigates a model of an annular channel with a diameter ratio of 0.762, an aspect ratio of 68.9:1 and heating of the internal surface of the inner cylinder with a 1.105MW/m2 heat flux. The Reynolds number ranges from 5 ...

Modeling of Radial Source Flow in Porous Media: Miscible Viscous Fingering Patterns

V. Sharma [1], S. Pramanik [2], M. Mishra [1],
[1] Indian Institute of Technology Ropar, Rupnagar, India
[2] Indian Institute of Technology Ropar, Rupnagar, India; Nordita, SE-10691 Stockholm, Sweden.

COMSOL Multiphysics® software was used to model radial source flow in two dimensional homogeneous porous media. Two-Phase Darcy's Law (tpdl) is used to model miscible viscous fingering. Fingering patterns obtained on using different mesh are discussed. Evolution from 'flowers' to 'branches' is observed in the fingering patterns. Stable displacement is generated even in the presence of unstable ...

A Comparison of the Continuous and Discrete Approach for Liquid Manipulation

S. F. Azam [1], G. Cathcart[1],
[1] RCAST, The University of Tokyo, Tokyo, Japan

The objective of this paper is to achieve a complete and rapid efficient mixing of numerous sample in micro-scale devices of microfluidic system. The principle of microfluidics is extensively used in a number of fields such as biomedical, healthcare, biochemical, drug research and other applications. These microfluidic devices with mathematical simulations are appropriately utilized in ...

Magneto-structural Analysis of Fusion grade Superconducting Toroidal Field Coils

A. Amardas [1], and S. Dwivedi[2]
[1] Institute for Plasma Research, Gandhinagar, Gujarat, India
[2] COMSOL Multiphysics Pvt. Ltd, Bangalore, Karnataka , India

In this paper, detail magnetostructural analysis of fusion grade superconducting toroidal field coils that are used in ‘tokamaks’ is presented. The stresses that arise due to Lorentz forces in large size superconducting coils that carry high currents are of catastrophic type in nature. These stresses are expected to influence the integrated performance of the magnet system. In this ...

Microwave Interstitial Tumor Ablation: New Modality for Treatment of Liver Cancer

S. Maini[1] , A. Marwaha[1] , and S. Marwaha[1]

[1] Department of Electrical & Instrumentation Engineering, SLIET , Longowal (Deemed University), Punjab

Hyperthermia is newly back in the interest of both, clinical and research oncologists, because of its properties to directly produce permanent damages of the treated tumors and to elicit important immunological responses against cancer cells by changing their immunogenicity.  Microwave ablation is used in the treatment of primary and secondary tumors of the liver.  Microwave antennas ...

Bio-Effluents Tracing in Ventilated Aircraft Cabins

G. Petrone[1], L. Cammarata[1], and G. Cammarata[1]
[1]Department of Industrial and Mechanical Engineering, University of Catania, Catania, Italy

Ventilation and Indoor Air Quality (IAQ) are issues of very high interest, determining comfortable conditions for occupants and no-contaminated local atmosphere. The aircraft cabins are more confined and have a higher occupant density than other indoor environments such as offices or residential houses. The passengers and the crew share a closed and ventilated cabin, which brings potential risk ...

Negative Ion Beams and Secondary Beams

M. Cavenago[1], P. Veltri[2], E. Gazza[2], G. Serianni[2], and P. Agostinetti[2]
[1]INFN-LNL, Legnaro, Padova, Italy
[2]Consorzio RFX, Padova, Italy

The development of powerful negative ion sources requires precise and versatile simulation tools to predict the emittance of the extracted ion beams and the heat load on the electrodes. A first tool is a determination of the plasma beam interface which is accomplished by a set of macro based in the COMSOL Multiphysics environment. Notwithstanding the strong nonlinearities involved, a proper ...

A Study of Curved Flexures for MEMS

Minhee Jun[1], and Jason V. Clark[1]
[1]Departments of Electrical and Computer Engineering, Purdue University, West Lafayette, IN, USA

Large deflection actuators are becoming increasingly important for microsystems. Since actuation forces are usually small, large deflection actuators usually require flexures with low stiffness. Rectangular serpentine flexures are often used for such actuators due to their low stiffness and large linear deflection range. In this paper we investigate the performance of curved serpentine flexures ...