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 the Squeeze Flow of a Thermoplastic Composite Tape during Forming

A. Levy[1], G.P. Picher Martel[1], P. Hubert[1]
[1]McGill University, Montreal, QC, Canada

Thermoplastic composite such as APC2 (Carbon/PEEK) are usually shipped as semi-finite tape products. Final product is obtained with forming by applying heat and pressure. A key phenomena is the squeezing of the tape. In this paper we compare the solution of the squeeze flow using a finite element method, an analytical model under lubrication assumption and experimental data. The finite element ...

Conjugate Heat Transfer

J. Crompton[1], L. Gritter[1], S. Yushanov[1], K. Koppenhoefer[1]
[1]AltaSim Technologies, Columbus, OH, USA

Quenching from high temperature by fluid flow has been analyzed; when no phase transformation occurs heat transfer is a function of conduction and convection. Flow conditions may lead to turbulent flow that affects the heat dissipation over the surface. Analysis of heat transfer with phase transformation is more complex ue to the range of near-wall effects from film boiling, transition boiling, ...

Modeling Internal Heating of Optoelectronic Devices Using COMSOL

N. Brunner[1][,][2]
[1]Voxtel, Inc, Beaverton, OR, USA
[2]University of Oregon, Eugene, OR, USA

In this paper the heat transfer module in COMSOL is utilized to simulate internal heating of an Avalanche Photodiode due to light-induced current through a resistivity that depends on charge carrier concentrations in the device. Initial tests are done by modeling the heating process on a previously-solved silicon p-n junction as a proof of concept before advancing to a more complicated geometry. ...

Numerical Study of Droplet Formation inside a Microfluidic Flow-Focusing Device

Y. Li[1], M. Jain[1], K. Nandakumar[1]
[1]Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA, USA

The micro-nanometer sized droplets have tremendous applications in bio-diagnostics, polymerization processes etc. In this work, we numerically investigate the droplet formation process of silicone oil in aqueous solution in a MFF device. A conservative level-set method is adopted to numerically model the droplet formation process numerically. The mono-dispersed and poly-dispersed droplet ...

Modeling Magnetic Configurations for Improved Separations of Magnetic and Non-Magnetic Materials

S. Khushrushahi[1], T.A. Hatton[1], M. Zahn[1]
[1]Massachusetts Institute of Technology, Cambridge, MA, USA

Magnetic separation of magnetic liquid phases/particles from non-magnetic liquid phases/particles are needed for applications such as cleaning up oil spills by separating oil and water liquid phases or separating magnetic materials from non-magnetic materials in biomedical and microfluidic applications. Magnetic fluids (also called ferrofluids), in a magnetic field, experience a magnetic force ...

Cryogenic Heat Sink for Helium Gas Cooled Superconducting Power Devices

L. Graber[1], N.G. Suttell[1], D. Shah[1], D.G. Crook[1], C.H. Kim[1], J. Ordonez[1], S. Pamidi[1]
[1]Center for Advanced Power Systems, Florida State University, Tallahassee, FL, USA

Heat sinks for cryogenic applications using helium gas as the coolant are not readily available. They require to be designed specifically for the intended application. A finite element model was developed to study the feasibility and optimize the design. The FEM computing package COMSOL Multiphysics allowed to couple fluid flow and heat transfer as needed. An experiment was designed to validate ...

Modeling Microwave Waveguide Components: The Tuned Stub

R.W. Pryor[1]
[1]Pryor Knowledge Systems, Bloomfield Hills, MI, USA

The waveguide device modeled here specifically demonstrates the exploration of a small, but very important, subset of components of the family of microwave hardware devices designed to facilitate the optimized transfer of power from the generating source to the consuming load. Each of those components is called, in electronics terminology, a Tuned Stub. A stub is a length of transmission line ...

Thermal Adversity in Solid-State Lighting

T. Dreeben[1]
[1]OSRAM SYLVANIA, Beverly, MA, USA

COMSOL Multiphysics is used to simulate natural convection and its impact on peak operating temperatures of solid-sate lighting in thermally adverse conditions. PDE modes in the general form are used in conjunction with a thin-surface conduction formulation in the weak form. COMSOL is used to predict both temperatures and heat flows through numerous components of the configuration. Model ...

Finite Element Convergence and Speed-Up Studies Using COMSOL Multiphysics and LiveLink™ for MATLAB® with Large Assembly Models

H. Pourzand[1], A.H. Aziz[1], A. Singh[1]
[1]Pennsylvania State University, State College, PA, USA

COMSOL Multiphysics along with its LiveLink™ for MATLAB® is used to investigate the needed number of elements and the required order of Lagrangean p element for a number of different simulation models. For this task, convergence study, speed up testing and interactive meshing is performed on a large assembly model which is also imported using the LiveLink™ for SolidWorks®. As a test bench, the ...

COMSOL Thermal Model for a Heated Neural Micro-Probe

M. Christian[1], S. Firebaugh[1], A. Smith[1]
[1]United States Naval Academy, Annapolis, MD, USA

This project utilizes the heat transfer module of the COMSOL Multiphysics environment to model the effects that an ohmic heating probe will have on neural tissue. The model quantifies the thermal impact of active components embedded on a neural micro probe by solving the Penne’s bioheat equation with an external MATLAB function to determine the heat generation along the length of the probe. The ...