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.

Simulation of a Magnetophoretic Device for the Separation of Colloidal Particles in Magnetic Fluids

S.K. Fateen, and M. Magdi
Cairo University, Giza, Egypt

Magnetophoresis of non-magnetic particles is the induced motion of non-magnetic particles suspended in magnetic media on the application of a magnetic field gradient. Magnetophoresis can be used in special separation devices to separate colloidal particles based on their sizes. Multiphysics computational programs, such as COMSOL, are ideal for the modeling and simulation of those devices. In ...

Computational Modeling of Synthetic Jets

D.C. Durán, and O.D. López
Universidad de los Andes, Bogotá, Colombia

A synthetic Jet actuator is a device which moves a fluid in and outside a cavity, through a small aperture, by the continuous oscillation of a diaphragm. The multiphysics interaction between the piezoelectric disk, which deforms due to the alternating voltage, and the fluid makes COMSOL Multiphysics the most suitable tool for the computational analysis of these devices. The first approach to the ...

Modeling PIN Photodiodes

R.W. Pryor
Pryor Knowledge Systems Inc., Bloomfield Hills, MI, USA

This paper presents one approach to the modeling of an abrupt junction PIN photodiode light sensor using COMSOL Multiphysics software and the incorporated SPICE® capability. The current model is built using the capabilities of SPICE in COMSOL Multiphysics 4.0. This model demonstrates the use of SPICE and the AC/DC Module to build a conduction current, rather than an electrostatic, model. This ...

Two Dimensional Finite Element Heat Transfer Analysis of a Buried Refined Bitumen Pipeline During Initial Start-up, Shutdown Following Initial Start-Up, and Normal Operation

R. Sisco
Worcester Polytechnic Institute, Worcester, MA, USA

This body of work uses the two dimensional finite element heat transfer capabilities of the conduction application mode within COMSOL to examine the temperature distribution in the fluid, pipe wall, insulation, and surrounding soil of a prototypical bitumen pipeline operating in a cold weather environment during the following modes of operation: initial start-up, shutdown following initial ...

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 of Transport and Reaction in a Catalytic Bed Using a Catalyst Particle Model

F. Allain, and A.G. Dixon
Worcester Polytechnic Institute, Worcester, MA, USA

A packed bed reactor consisting of spherical catalyst particles in a tube was simulated numerically. The steady-state pseudo-heterogeneous model consisted of a pseudo-continuum representation for the heat and mass transfer in the reactor tube. The reaction source terms were evaluated by explicitly solving a 1D spherical pellet model at each discretization point. The model implemented in COMSOL ...

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 ...

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 ...

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 ...

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