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.

Air Convection on a Micro Hotplate Gas Sensor

S. Gidon[1], M. Brun[1], S. Nicoletti[1], P. Barritault[1]
[1]Commissariat Energie Atomique, LETI, Minatec Campus, Grenoble, France

Monitoring of indoor CO2 concentration is of particular interest to detect room occupancy in order to optimize power consumptions of building. One approach to monitor the indoor CO2 concentration is to use optical detection using specific absorption lines of CO2 molecules in the infrared domain close to 4.2 µm. Such optical sensors include a detector, typically a micro-bolometer, an IR source ...

Design and Implementation of MEMS based Blood Viscometer for INR Measurement

J. G. Immanuel[1], K. Poojitha[1], B. Viknesshwar[1], A. Gupta[1]
[1]PSG College of Technology, Peelamedu, Coimbatore, Tamil Nadu, India

The paper brings out the designing and implementation of blood viscosity monitoring device that gives us the INR to measure the effectiveness of anti coagulant medications .When a blood vessel is damaged, clotting cascade begins that results in blood clot. This process is affected by several medical conditions where it becomes mandatory for a patient to intake anti-coagulants. Thus to monitor ...

FEM-Simulation of a Printed Acceleration Sensor with RF Readout Circuit

H. Schweiger[1], T. Göstenkors[1], R. Bau[1], D. Zielke[1]
[1]Dept. Engineering Sciences and Mathematics, University of Applied Sciences Bielefeld, Bielefeld, Germany

In this paper we want to figure out the development of a capacitive acceleration-sensor system with the FEM-Method. The sensor-system is in the position to detect accelerations in the range of ±20 g. Furthermore the sensor-element contains a printed RF-inductance, which is used for contactless data transfer. On the one hand the simulation of the L-C-oscillating circuit using the RF Module of ...

Modeling and Simulation of the Rapid and Automated Measurement of Biofuel Blending in a Microfluidic Device under Pressure Driven Flow using COMSOL Multiphysics®

Sanket Goel[1], Venkateswaran PS[1], Rahul Prajesh[2], Ajay Agarwal[2]
[1]University of Petroleum & Energy Studies, Bidholi, Prem Nagar, Dehradun, India
[2]CSIR - Central Electronics Engineering Research Institute,(CSIR-CEERI) Pilani, India

• Real-time detection and monitoring of bio-fuel blend-ratio and adulterated automobile fuels by a reproducible micro-fabrication process in a cost-and-time efficient manner. • COMSOL Multiphysics® simulations and modelling of Viscosity based Laminar Flow inside a Y-shaped Micro-fluidic Device. • Design and Fabrication of a polymer Y-shaped Micro-fluidic Device to work as Micro-Viscometer for ...

AC Electrothermal Characterization of Doped-Si Heated Microcantilevers Using Frequency-Domain Finite Element Analysis - new

K. Park[1], S. Hamian[1], A. M. Gauffreau[2], T. Walsh[2]
[1]Mechanical Engineering Department, University of Utah, Salt Lake City, UT, USA
[2]Department of Mechanical, Industrial & Systems Engineering, University of Rhode Island, Kingston, RI, USA

This work investigates the frequency-dependent electrothermal behaviors of freestanding doped-silicon heated microcantilever probes operating under the periodic (ac) Joule heating. The transient heat conduction equation for each component (i.e., the low-doped heater region, the high-doped constriction region, and the high-doped leg region) is solved using the general heat transfer module for DC ...

Janus 颗粒自驱运动的数值模拟

崔海航 [1], 王雷磊 [1], 谭晓君 [1],
[1] 西安建筑科技大学,西安,陕西,中国

Janus 颗粒是由物理或化学性质不同的两部分所构成的颗粒的总称。由于其结构的特殊性以及自驱动特性使其在MEMS、药物传输等领域有着潜在的应用价值。本文基于COMSOL Mutiphysics® 4.3a 多物理场耦合模拟平台对不同形状的 Pt-SiO2 型 Janus 颗粒的在不同浓度 H2O2 溶液中的自扩散泳动进行了数值模拟,并进一步研究模拟了球形 Janus 颗粒的近壁面运动。

Modeling and Characterization of Superconducting MEMS for Microwave Applications in Radioastronomy

N. Al Cheikh[1], P. Xavier[1], J. Duchamp[1], and K. Schuster[2]
[1]Institute of Microelectronics, Electromagnetism and Photonics (IMEP-LAHC), Grenoble, France
[2]Institute of Millimetrics Radio Astronomy (IRAM), Grenoble, France

Superconducting GHz electronics circuits are frequently used in Radio Astronomy instrumentation. The features of these instrumentations can be significantly improved by using tuneable capacitances, which can be realized by electrically actuated, micromechanical bridges (MEMS) made of superconducting Niobium (Nb). In order to analyze the electromechanical behavior of such devices and the ...

Modeling Flow of Magnetorheological Fluid through a Micro-channel

N.M. Bruno[1], C. Ciocanel[1] and A. Kipple[2]
[1]Department of Mechanical Engineering, Northern Arizona University, Flagstaff, Arizona, USA
[2]Dept. of Electrical Engineering and Computer Sciences, Northern Arizona University, Flagstaff, Arizona, USA

This paper presents the approach taken through the utilization of COMSOL Multiphysics 3.5a, to develop a model that simulates the flow of a magnetorheological (MR) fluid through a micro-channel. The model was developed as an aid in the analysis of a micropump that produces flow by means of displacement of a MR fluid slug within a microchannel.

Detection of Magnetic Particles by Magnetoresistive Sensors

A. Weddemann[1], A. Auge[1], F. Wittbracht[1], C. Albon[1], and A. Hütten[1]
[1]Department of Physics, Thin Films and Physics of Nanostructures, Bielefeld University, Bielefeld, Germany

In this work, we demonstrate the implementation of the micromagnetic equations for the description of ferromagnetic thin films in COMSOL Multiphysics®. We apply our model to magnetoresistive sensors consisting of several soft ferromagnetic layers and their response to magnetic particles. The magnetization dynamic of the particles needs to be described in a similar manner, though due to size ...

Kinetic Investigation of a Mechanism for Generating Microstructures on Polycrystalline Substrates Using an Electroplating Process

T. Soares[1], H. Mozaffari[2], H. Reinecke[1]
[1]Universität Freiburg, Freiburg im Breisgau, BW, Germany
[2]Hochschule Furtwangen, Tuttlingen, BW, Germany

The purpose of this study is to understand the growth mechanism of copper (Cu) films on a Cu-Zn system substrate with a pre-defined pattern. The pattern was defined by conducting a selective etching process on a two-phase polycrystalline substrate. As a result of this process, there were etched regions correspondent to beta-phase crystals and quasi non-etched regions that belong to alpha-phase ...