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.

Modeling and Simulation of a Piezoelectric Micro-Power Generator

E. Abdel-Rahman, M. Pallapa, M.A.S. Aly, L. Wong, A.I.H. Chen, K.W. Wong, and J.T. Yeow
University of Waterloo, Waterloo, ON, Canada

Micro-power generators (MPGs) harvest and store small amounts of ambient energy. The motivation of this paper is to compare the MPG modeling and simulation results obtained from COMSOL Multiphysics® with those obtained using three other approaches: CoventorWare®, ANSYS® and lumped element analysis. The MPG is composed of two identical micro-cantilever beams made of a piezoelectric ...

The Transient Modeling of Bubble Pinch-Off Using an ALE Moving Mesh

C.J. Forster, and M.K. Smith
Georgia Institute of Technology, Atlanta, GA, USA

The use of an acoustic field to control the boiling process has the potential to increase the overall rate of heat transfer and delay the critical transition to film boiling. This system is being investigated through the development of a model of a single boiling bubble near a flat, heated, horizontal surface in the presence of an acoustic field. The dynamics of the bubble interface is modelled ...

Uncertainty Analysis, Verification and Validation of a Stress Concentration in a Cantilever Beam

S. Kargar, and D. Bardot
University of Alabama, Huntsville, AL, USA

In this paper we compare the results from a bending cantilever beam experiment with the theoretical values and COMSOL finite element simulation results. In the experiment a simple cantilever beam with a hole is loaded at the end. Measurements are recorded by four strain gauges mounted on the beam, three near the hole and one at a location where the nominal stress is equivalent to that of a ...

Simulations of Meniscus Motion and Evaporation for Convective Deposition Manufacturing

J. Xiao, and D. Attinger
Columbia University, New York, NY, USA

Convective deposition is a material processing technique where an evaporating meniscus of a colloidal suspension is dragged along a solid substrate to deposit layers of micro or nanoparticles. The process is a typical multiphysics process where fluid dynamics, mass and heat transfer come into play in a small deforming domain. In this work, we describe an Arbitrary Lagrangian-Euler model ...

Finite Element Analysis of Pipes Considering the Effects of Stress Concentration Due to Dents

S.C. de Oliveira[1], E.P. de Deus[2], and A.M. Mont'Alverne[2]
[1] Funcap/CNPq, CE, Brazil
[2] Universidade Federal do Ceara, Fortaleza, CE, Brazil

This paper presents a numerical analysis of indented pipes based on the Finite Element (FE) within the framework of COMSOL Multiphysics. Numerical models using two-dimensional solid plane strain elements are evaluated. Geometric nonlinear analysis, nonlinear isotropic hardening material and contact were also incorporated into the models. The numerical models are calibrated by using an analytical ...

Influence of Inlet Fluctuations on the Development of The Turbulent Two-Stream Mixing Layer

J. Tawfik, and R. Arimilli
The University of Tennessee, Knoxville, TN, USA

The finite element method applied to the k-epsilon turbulence model is used to investigate the two-stream turbulent mixing layer. Whereas the model is known as one of the most popular of the turbulence models to date, the model has yet to be applied to the classical mixing layer problem to the best of our knowledge. A transient k-epsilon turbulence model in COMSOL is used to solve this problem. ...

Modeling Light Diffraction Using the Finite Element COMSOL

J.D. Bamonte
U.S. Naval Academy, Annapolis, MD, USA

COMSOL is finite element modeling software capable of solving partial differential equations. This capability allows for the modeling of boundary value problems, which is necessary to the study of light and the properties of light propagation. For this study, we are modeling Fraunhofer diffraction of light using a solution of the Helmholtz equation with boundary values appropriate for ...

Virtual Acoustic Prototyping – Practical Applications for Loudspeaker Development

A. Salvatti
JBL Professional, Northridge, CA, USA

The author presents an overview of methods to build virtual prototypes of both horns and loudspeaker drivers which allows a significant reduction in the number of physical prototypes, as well as reduced development time. This paper will present some of the practical results from work the author has performed in the course of designing both transducers and horns using COMSOL Evolution of the ...

Modeling Thickness Shear Mode Quartz Sensors for Increased Downhole Pressure & Temperature Applications

G.R. Kirikera, W. Patton, and S.M. Behr
Geophysical Research Company LLC, Tulsa, OK, USA

Numerous sensors based on various sensing principles are used to measure pressures and temperatures in wellbores. Of all these sensors, piezoelectric quartz is the most preferred means of sensing pressure and temperature and is probably the only sensor to meet stringent downhole measurement requirements. The sensor consists of a quartz piezoelectric resonator hermetically sealed between two ...

Demonstration of a Novel Surface Plasmon Based Interferometer with COMSOL

D. Carrier, and J.J. Dubowski
Université de Sherbrooke, Sherbrooke, QC, Canada

In order to provide swift and precise diagnostics, physicians and medical doctors require an adequate amount of information about the patient\'s condition. An integrated SPR (surface plasmon resonance) biosensing platform is currently developed by our research group with the aim of preserving compatibility with microfabrication techniques, open-ended surface and integrated light source. In order ...

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