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.

Analysis of Thermoelectric Phenomena

J. Crompton, S. Yushanov, L. Gritter, and K. Koppenhoefer
AltaSim Technologies, LLC.
Columbus, OH

Thermoelectric phenomena provide the direct conversion of heat into electricity or electricity into heat, the phenomena is described by three related mechanisms: the Seebeck, Peltier and Thomson effects. Thermoelectric devices have found many applications ranging from temperature measurement, solid state heating or cooling and direct energy conversion from waste heat. In this paper, analysis ...

Multiphysics Modeling of Electro-Optic Devices

J. Toney
Srico, Inc.
Columbus, OH

Designers of electro-optic modulators and related devices often use separate tools to study the optical and electrical portions of the device. The flexibility of COMSOL Multiphysics makes it possible to construct unified models of EO phenomena including realistic waveguide profiles and anisotropic material properties. We demonstrate the use of the RF Module to compute both RF and optical ...

A 2D Axisymmetric Electrodeposition Model

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

Electroplating is a vital technology widely employed for many technological applications ranging from decorative or anti-corrosion coatings to high precision nanotechnology passive electromagnetic cloaking devices. This 2D Axisymmetric Electroplating Model demonstrates one of the modeling methodologies that can be used to calculate the transient generation of a coating thickness of a ...

Modeling of Microwave Heating of a Rotating Object in a Domestic Oven in COMSOL Multiphysics

J. Raj[1], S. Birla[2], K. Pitchai[3], J. Subbiah[2], and D. Jones[2]
[1]Indian Institute of Crop Processing Technology, Thanjavur, Tamil Nadu, India
[2]Dept. of Biological Systems Engineering, University of Nebraska Lincoln, Lincoln, NE
[3]Dept. of Food-Science, University of Nebraska Lincoln, Lincoln, NE

Domestic microwave ovens are notorious for their uneven heating of food materials. This is caused by a varying electromagnetic field whose variation is caused by a number of factors dependent on the oven and the food parameters. Experimental validation of heating would therefore give highly variable results and would be labour, resource and time intensive. Thus modeling of the microwave ...

Study of AC Electrothermal Phenomena Models

S. Loire, and P. Kauffmann
University of California
Santa Barbara, CA

Recently, electrokinetic flows have raised the interest of the scientific community. Driving flow with an electric field leads to promising applications for mixing, concentration, pumping application in lab on chips. However, current models are still inaccurate and don\'t fit the measures. The simple decoupled model developed by Ramos et al does not predict velocities for all parameters. ...

Poromechanics Investigation at Pore-scale Using Digital Rock Physics Laboratory

S. Zhang[1],
N. Saxena[2],
P. Barthelemy[1], and
M. Marsh[1]
[1]Visualization Sciences Group, Burlington, MA, USA
[2]Stanford University, Palo Alto, CA, USA

Understanding the rock structure at nano to micro scale is of growing importance in geology, oil and gas, and hydrology. New approaches that relies on a variety of high resolution 3D imaging techniques offered tremendous potential. These new approaches, in the meanwhile, introduce significant new challenges. Starting from digital imaging data, the paper introduces an image-to-simulation ...

The Transient Modeling of Single-Bubble Nucleate Boiling in a Sub-Cooled Liquid Using an ALE Moving Mesh

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

This paper investigates the evolution of a single bubble going through growth, pinch-off, and condensation while rising due to buoyancy forces in a sub-cooled liquid. Phase change is modeled on the evolving liquid-vapor interface by considering changes in enthalpy and heat fluxes at the interface. A comparison of the ALE model is made with the same single-bubble system computed with a level ...

Modeling of Susceptor Assisted Microwave Heating in Domestic Ovens

K. Pitchai[1], S. Birla[2], J. Diamond Raj[3], J. Subbiah[2], and D. Jones[2]
[1]Dept. of Food Science and Technology, University of Nebraska, Lincoln, NE
[2]Dept. of Biological Systems Engineering, University of Nebraska, Lincoln, NE
[3]Indian Institute of Crop Processing Technology, Thanjavur, Tamil Nadu, India

Susceptors are very thin metallic microwave absorbing films used in microwaveable food packaging. They tend to heat up very rapidly during microwave heating and this effect helps to overcome two major issues faced in domestic microwave ovens; 1) Non-uniform heating and 2) lack of browning. While susceptors are being widely used, there is still a lack of scientific knowledge about their ...

COMSOL Modeling of Groundwater Flow and Pollutant Transport in a Two-Dimensional Geometry with Heterogeneities

M. Gobbert, M. Whitmore, B. Peercy, M. Baker, and D. Trott
University of Maryland Baltimore County
Baltimore, MD

The Delmarva Peninsula is located on the East Coast of the United States, between the Chesapeake Bay and Atlantic Ocean. Industrial farming in the Delmarva Peninsula leads to levels of nutrients nitrogen, which grossly exceed natural levels and greatly impair the health of the bay. The main source of water carrying excess nitrogen to streams is groundwater. We use the software package COMSOL ...

Finite Element Convergence for Time-Dependent PDEs with a Point Source in COMSOL 4

M. Gobbert, and D. Trott
University of Maryland Baltimore County
Baltimore, MD

Many application problems have non-smooth forcing terms, such as the Dirac delta function. The convergence order for the FEM solution is limited by the regularity of the solution in this case. This paper presents information on the techniques needed in COMSOL 4 to enable FEM convergence studies for time-dependent problems of this type, including how to correctly implement the Dirac delta ...