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.

Design and Analysis of Stacked Micromirrors

S. Park, S. Chung, and J. Yeow

University of Waterloo, Systems Design Engineering, Waterloo, Ontario, Canada

A micromirror or a torsional actuator in general has been proven to be one of the most popular actuators fabricated by Micro-Electro-Mechanical System (MEMS) technology in many industrial and biomedical applications such as RF switches, a laser scanning display, an optical switch matrix, and biomedical image systems. In this paper, two stacked micromirrors are presented and analyzed to show ...

COMSOL Multiphysics: Innovative Design and Engineering

S. Wang[1]
[1]Department of Mechanical Engineering, Kun Shan University of Technology, Tainan, Taiwan

Multiphysics simulation has been used extensively in our research for fluid flow and heat transfer applications. Our projects include: simulation of fluid dynamics in an active liquid heat sink for CPU cooling, impeller design for a pipe flow generator with computational fluid dynamics (CFD), investment casting with plastic rapid prototype patterns, phase change materials with rapid prototyping ...

Void Shape Evolution of Silicon Simulation in COMSOL Multiphysics®

C. Grau Turuelo[1], B. Bergmann[1], C. Breitkopf[1]
[1]Technische Universität Dresden, Dresden, Germany

The void shape evolution of a trench patterned silicon substrate results in diverse cavities by varying initial conditions. The size and the arrangement of the initial trenches are decisive for the transformation process besides the annealing conditions which are, in fact, time and temperature, and the existing pressure values. The prediction of the shape evolution depending on different ...

Design Optimization of Piezoelectric Micro-machined Modal Gyroscope

Shambhu Singh[1], Dr. N N Sharma[1]
[1]Birla Institute of Technology and science, Pilani, Rajasthan, India

A solid state Piezoelectric Micro Machined Modal Gyroscope is a vibratory type of gyroscope which sense the motion by voltage induced due to Coriolis force. It utilizes natural frequency of the structure to maximize the displacements and hence maximizing the induced voltage signals for sensing.The mode suitable for gyroscopic motion is 9th mode, which was found to be vibrating at 350.217 kHz. A ...

Studies on Electrostatic Field of a Resistive Plate Chamber

A. Jash[1], N. Majumdar[1], S. Mukhopadhyay[1], S. Chattopadhyay[4]
[1]Saha Institute of Nuclear Physics, Kolkata, West Bengal, India
[4]Variable Energy Cyclotron Centre, Kolkata, West Bengal, India

Resistive plate chambers (RPC) are fast gaseous detectors, having a simple design and construction, good time resolution and high efficiency. These are extensively used in high energy physics experiments. A large number of RPCs will be used as the main detector element for India’s mega science project, India Based Neutrino Observatory (INO). So, detailed study of this detector is very crucial ...

Flow-induced Vibrations of the Uvula and its Implication on Snoring

J. Xi[1], Q. M. Mohamad[1], Y. E. Yuan[1], J. Rohlinger[1]
[1]Mechanical and Biomedical Engineering, Central Michigan University, Mount Pleasant, MI, USA

1. Flow-induced uvula deformation considerably altered the flow dynamics inside the nose. 2. For a weak soft palate, complete flow occlusion can occur (sleep apnea). 3. Vibration of the airway structures is crucial to better understand snoring generation mechanisms and breathing-related disorders.

Empirical Model Dedicated to the Sensitivity Study of Acoustic Hydrogen Gas Sensors Using COMSOL Multiphysics®

A. Ndieguene[1], I. Kerroum[1], F. Domingue[1], A. Reinhardt[2]
[1]Laboratoire des Microsystèmes et de Télécommunications/Université du Québec à Trois-Rivières, Trois-Rivières, QC, Canada
[2]Laboratoire d’Électronique et des Technologies de l’Information, CEA, LETI Grenoble, France

Due to the increasing demand for hydrogen gas sensors for applications such as automation, transportation, or environmental monitoring, the need for sensitive and reliable sensors with a short response time is increasing. This paper presents an empirical model that studies the sensitivity of acoustic hydrogen gas sensors. A parametric study based on the variation of physical properties of ...

Optimization of 3D Layered Metal-Dielectric Stacks (MDS) for Near-Field Fluorescence Imaging

P.S. Tan[1], K. Elsayad[2], K. Heinze[1]
[1]Rudolf Virchow Center, University of Würzburg, Würzburg, Germany
[2]Research Institute of Molecular Pathology (IMP), Vienna, Austria

Nano-structures consisting of layered metal-dielectric stacks (MDSs) can be designed to have evanescent transmission and reflection coefficients that oscillate as a function of transverse wavevector and frequency. However, these structures always suffer from the material losses and surface roughness that are detrimental to image reconstruction. As such, we propose an optimized planar anisotropic ...

Modeling an Adsorption Process in a Shell-and-Tube-Heat-Exchanger-Type Adsorber - new

G. Salazar Duarte[1], B. Schürer[1], C. Voss[1], D. Bathen[2]
[1]Linde AG, Munich, Germany
[2]Universität Duisburg-Essen, Duisburg, Germany

Pressure Swing Adsorption (PSA) and Temperature Swing Adsorption (TSA) are commonly used for separation/purification of gas mixtures in industrial processes. The cycle time of industrial TSA processes usually ranges from several hours to days. The reason for this long cycle time is the usage of purge gas for heating and cooling the system (direct heating), which limits the application of TSA ...

Thermal Natural Convection Simulations with COMSOL Multiphysics® in Comparison with Measurements - new

H. van Halewijn[1]
[1]Fontys University of Applied Physics, Eindhoven, The Netherlands

In a laboratory setup a horizontal rod is heated on one side. By natural convection a stable temperature pattern is developed. Using the Nusselt formulation of the natural convection of cylindrical rods, the temperature distribution can be calculated. Only a good match of the simulations and the measurements can be reached when taking into account all the non-linear physics in the system. In ...