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.

Droplet Generation by Means of a Two-Fluid Probe

B.P. Cahill[1], M. Quade[1], G. Gastrock[1], K. Lemke[1], J. Metze[1], and D. Beckmann[1]

[1]Institut für Bioprozess und Analysenmesstechnik e.V., Rosenhof, Heilbad Heiligenstadt, Germany

This paper presents a simulation of the operation of a new type of droplet generation probe. This probe, consisting of two concentrically-arranged tubings, is immersed in a beaker of cell medium so that oil is pumped through the outer tubing at a pumping speed less than fluid is drawn into the inner tubing. In this way, droplets of cell medium are entrained into the outlet tubing forming a ...

Experimentally Matched Finite Element Modeling of Thermally Actuated SOI MEMS Micro-Grippers Using COMSOL Multiphysics

M. Guvench[1], and J. Crosby[1]
[1]University of Southern Maine, Gorham, Maine, USA

In “Micro-Electro-Mechanical-Systems” shortly known as MEMS, one of the most important and effective principle of creating transduction of electrical power to displacement force is thermal expansion. A slim beam of MEMS material, typically Silicon, is heated by the application of electrical current via Joule heating; it expands and creates motion. In the design of many MEMS devices ...

Design of Passive Micromixers using the COMSOL Multiphysics software package

M. Itomlenskis, P. Fodor, and M. Kaufman

Physics Department, Cleveland State University, Cleveland, OH, USA

Relief patterning of the surface of microchannels has been actively pursued as a method of promoting mixing in systems with a low Reynold’s number (<<100). In this work, we explore, by using the COMSOL Multiphysics package and its Chemical Engineering Module, the possibility of enhancing the mixing quality of two fluids in a microchannel with a non-periodic fractal pattern of ridges ...

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 ...

Mechanical Model of RF MEMS Capacitor Structures

R. Chatim[1]
[1]University of Kassel, Kassel, Germany

In order to design an RF MEMS based device, it is beneficial to have information concerning mechanical behavior. For model verification purpose, solution offered by simulation software equipped with predefined physics application is one valuable way to provide initial reference. To avoid unwanted particular total strain in RF MEMS structures, a compensation layer can be utilized. When the number ...

Multiphysics Modeling and Simulation of MEMS based Variometer for Detecting the Vertical Speed of Aircraft in Avionics Applications

K. Umapathi[1], K. Sukirtha[2], C. Sujitha[2], K. A. Noushad[2], Venkateswaran[1], R. Poornima[1], R. Yogeswari[1]
[1]United Institute of Technology, Coimbatore, Tamil Nadu, India
[2]Sri Krishna College of Engineering and Technology, Coimbatore, Tamil Nadu, India

The objective of this work is to develop a MEMS based Variometer to measure the vertical speed and to sense the instantaneous rate of climb or descent in Aircrafts to meet the miniaturization requirements in avionics industry. The design consists of dielectric material in between two micro electrodes. The micro diaphragm is placed on one of the electrode. As the aircraft changes altitude, the ...

Finite Element Model of Surface Acoustic Wave Scattering with High-Aspect-Ratio Irregularities

S. Iuliia [1], Y. Sergey [1], K. Sergey [1], P. Alexey [1],
[1] Saratov State University, Saratov, Russia

The design of surface acoustic wave (SAW) devices needs the accurate study of the scattering fields, arising from the interaction of SAW with periodic irregularities placed on a surface of crystal to form interdigital transducers or reflective structures (RS). To solve this problem, the finite element methods are very perspective, because they allow to take into account the actual geometry of ...

Design and Analysis of CO2 Sensor using COMSOL Multiphysics® Software

S. B. Umbarkar[1], G. Y. Rajput[1], R. Vasappanavara[1],
[1] Department of Electronics Engineering, RAIT, Navi Mumbai, Maharashtra, India.

In this paper, a carbon dioxide sensor is introduced. At present many CO2 sensors are available, but they all required power in the order of few watts, therefore they are not suitable for long term unattended operation. This paper gives the brief description of CO2 sensor modeling using the MEMS Module of COMSOL Multiphysics® software. These sensors are inexpensive, highly selective and ...

Effect of Mass Adsorption on a Resonant NEMS

J. J. Ruz Martinez
Instituto de Microelectronica de Madrid
Tres Cantos
Madrid, Spain

The motion of a resonant NEMS has been widely studied for many different applications such as structural mechanics in engineering, ultra sensitive mass spectrometers or the well known Atomic Force Microscope. The study of the eigenfrequencies of such structures is very important, and nowadays there are good theoretical methods to accurately predict such eigenfrequencies. When a little mass is ...

Xylophone Bar Magnetometry and Inertial-grade MEMS Optimisation: a Multiphysics Approach

H. T. D. Grigg, and B. J. Gallacher
Microsystems Group
Newcastle University
Newcastle upon Tyne
Tyne and Wear, UK

This paper presents ongoing research aimed at development of a MEMS magnetometer capable of nanoTesla sensitivity. Such a device would pave the way for inertial-grade MEMS IMUs. A resonant sensor is proposed, based on a Xylophone Bar sense element, and is analysed both directly and via COMSOL. Mode shapes and frequencies are found as functions of geometric parameters, and the results used ...