Technical Papers and Presentations

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.

COMSOL Computational Fluid Dynamics for Microreactors Used in Volatile Organic Compounds Catalytic Elimination

M. Olea[1], S. Odiba[1], S. Hodgson[1], A. Adgar[1]
[1]School of Science and Engineering, Teesside University, Middlesbrough, United Kingdom

Volatile organic compounds (VOCs) are organic chemicals that will evaporate easily into the air at room temperature and contribute majorly to the formation of photochemical ozone. They are emitted as gases from certain solids and liquids in to the atmosphere and affect indoor and outdoor air quality. They includes acetone, benzene, ethylene glycol, formaldehyde, methylene chloride, ...

Design and Analysis of MEMS Micro Mirror using Electro Thermal Actuators

L. Sujatha[1], D. K. Balasubramanian[2], V. S. Selvakumar[1]
[1]Rajalakshmi Engineering College, Chennai, India
[2]University of Central Florida, Orlando, Florida, United States

Micro Mirror is a versatile device which has been gaining popularity and also the importance of MEMS techniques to develop such devices. These mirrors find applications in fields such as optical switching, display and in medical fields for non-invasive imaging. A thermally actuated mirror moves in either vertical or horizontal directions for the given orientation. The ends of thermal actuators ...

Zone sculpting using partitioned electrokinetic injections

Narovlyansky, M.1, Squires, T.M.2, Whitesides, G.M.1
1 Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, U.S.A.
2 Departments of Physics and Applied Mathematics, Caltech, Pasadena, CA

In electrokinetic separations, the narrower and more homogeneous the initial sample plug, the higher the ultimate resolution of the separation. Here we describe a general and versatile method to sculpt low-dispersion, high-fidelity sample zones in microfluidic devices for high resolution electrokinetic separations. In a simple channel intersections microfabricated partitions act to reduce each ...

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 ...

Control of Rolling Direction for Released Strained Wrinkled Nanomembrane

P. Cendula[1], S. Kiravittaya[1], J. Gabel[1], and O.G. Schmidt[1]

[1]Institute for Integrative Nanosciences, Dresden, Germany

Strained wrinkled and flat nanomembranes have different bending properties when they are released from the underlying substrate. This is caused by increased bending rigidity of the wrinkled film in one direction. We provide theoretical and numerical analysis of the directional rolling of wrinkled films, which is important for positioning rolled-up tubes on the short mesa edge during fabrication.

Viscous damping of a periodic perforated MEMS microstructure when the Reynolds’ equation cannot be applied: Numerical simulations

D. Homentcovschi[1], and R.N. Miles[1]
[1]Department of Mechanical Engineering, SUNY Binghamton, NY

This paper develops a computational model for determining the total damping coefficient for a unit cell of a MEMS microscale device containing a repetitive pattern of holes. The basic cell of the microstructure is approximated by an axi-symmetric domain and the velocity and pressure fields are determined from solutions of the Navier-Stokes equations using the finite element software package ...

Powerful automation and optimization methods for Material- and Process analysis with COMSOL Multiphysics and Matlab

T. Frommelt
SGL Group, Technology & Innovation, Meitingen, Germany

Thomas Frommelt received his PhD in physics in 2007 from the University of Augsburg for experimental work and simulation analysis on acoustically driven microfluidic mixing. In 2008, he joined the SGL Group and introduced COMSOL Multiphysics as the tool for flexible equation based modelling. Since then, he has focused on carbon material and process simulation employing methods of optimization and ...

FEM Based Estimation of Biological Interaction Using a Cantilever Array Sensor

S. Logeshkumar, L. Lavanya, G. Anju, and M. Alagappan
PSG College of Technology
Coimbatore
Tamil Nadu, India

In the model silicon nanorods are designed as cantilever array and coated with thin film of aluminum or aluminum nitride, to be characterized, thus, adding a detectable mass and altering the cantilever resistance to bending. The simulated results show that when films of different thickness are placed on the cantilever, there is a corresponding change in the resonant frequency and the ...

A Study of Thermal Stress Distribution Produced During MEMS Packaging - new

V. Sharma[1], A. K. Jayanthy[1], J. G. Baruah[1], J. V. Prabhu[1], K. Balakrishnan[1]
[1]SRM University, Chennai, Tamil Nadu, India

The analysis performed is categorized into two levels: 1. The thermal stress distribution on the sensing part with the variation in the substrate three glass material with appropriate dimensions and exposures. The reason behind this consideration of different materials is test the compatibility with the crystal. This variation in substrate material and its material properties shows which is ...

Motion of Uncharged Particles in Electroosmotic Flow through a Wavy Cylindrical Channel

N. Qudus[1], T. Mahbub[1], S. A. Ali[1], and M. Shajahan[1]
[1] Bangladesh University of Engineering and Technology, Dhaka Bangladesh

A finite element model is employed to describe the electric potential distribution and electroosmotic flow field inside a wavy cylindrical channel. The model uses coupled Laplace and Poisson-Boltzmann to evaluate the electric potential distribution inside the channel. It also contains continuity and Navier–Stokes equations for the solution of fluid flow. A particle trajectory model was ...

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