Technical Papers and Presentations

Ici vous trouverez les présentations issues des Conférences COMSOL à travers le monde. Réalisées par des utilisateurs de COMSOL Multiphysics, ces présentations explorent tous les domaines actuels d'innovation. Les applications couvrent pratiquement tous les secteurs industriels et impliquet des phénomènes électriques, mécaniques, fluidiques et chimiques. utilisez la recherche rapide pour trouver les présentations les plus intéressantes dans votre domaine d'intérêt.

Improving Fuel Usage in Microchannel Based Fuel Cells

P. Fodor, and J. D'Alessandro
Dept. of Physics
Cleveland State University
Cleveland, OH

In this work a miniaturized fuel cell design based on microchannels, into which the liquid fuel and oxidizer streams are fed through T shaped connectors, is optimized for improved fuel usage. This particular design exploits the laminar nature of the fluid flow at small Reynolds numbers to keep the fuel and oxidizer confined in the vicinity of the corresponding electrodes without the need of a ...

Sequential Estimation of Temperature-Dependent Thermal Diffusivity in Cherry Pomace during Nonisothermal Heating

I. Greiby[1], D. Mishra[2], and K. Dolan[3]
[1]Dept. of Biosystems & Agricultural Eng., MSU, East Lansing, MI
[2]Dept. of Biosystems & Agricultural Eng., MSU, East Lansing, and Nestle Nutrition, PTC Fremont, MI
[3]Dept. of Biosystems & Agricultural Eng. and Dept. of Food Science & Human Nutrition, MSU, East Lansing

Fruit and vegetables are a rich source of many bio-active compounds from which value-added nutraceuticals can be produced. To design processes for these solids that will maintain food safety and maximize quality over a large temperature range, temperature-dependent thermal properties are needed. The objective of this work was to estimate temperature and moisture-dependent thermal diffusivity of ...

Optimization of the Lithium Insertion Cell with Silicon Negative Electrode for Automotive Applications

R. Chandrasekaran, and A. Drews
Research and Advanced Engineering
Ford Motor Company
Dearborn, MI

The US Advanced Battery Consortium (USABC) has established goals for long term commercialization of advanced batteries for electric vehicle applications. In this work, a dual lithium-ion insertion cell with silicon as the negative electrode and an intercalation material as the positive electrode is modeled using COMSOL Multiphysics. Both are composite porous electrodes with binder, void volume ...

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 ...

Multiphysics Modeling of Magnetorheological Dampers

D. Case, B. Taheri, and E. Richer
Southern Methodist University
Dallas, TX

A magnetorheological fluid consists of a suspension of microscopic magnetizable particles in a non-magnetic carrier medium. When a magnetic field is produced in the same space, the microscopic particles suspended in the fluid become oriented and form chains along the magnetic flux lines, changing the fluid’s rheology. This project uses COMSOL Multiphysics to examine the magnetic flux lines ...

Kinetics of Zebrafish Dorsoventral Patterning

B. Jordan, and P. Müller
Harvard University
Cambridge, MA

The specification of cell types and morphogenesis of many biological systems are regulated by the concentrations of signalling molecules. Many systems employ a pair of secreted short-range activators and long-range inhibitors, and these are widely used to generate complex patterns during development. However, the biophysical mechanisms that regulate the different ranges of activators and ...

The Role of 1D & 2D Asymmetric Diffusion Layers In Rectification Through Ion-Selective Membranes

W. Booth, J. Schiffbauer, and B. Edwards
West Virginia University
Star City, WV

Ion-selective membranes can be used in lab-on-a-chip devices for various portable applications in this field. These devices can be used as concentrators for analytical chemistry and for micro-scale filtration. Here, a binary aqueous electrolyte solution in a microchannel has a potential bias applied across it and it is driven through an ion-selective membrane. Ion concentration gradients form ...

HIIPER Space Propulsion for Future Space Missions

G. H. Miley[1], M. P. Reilly[2], B. Ulmen[3], P. Keutelian[3], and J. Orcutt[3]
[1]NPL Associates, Inc., Urbana-Champaign, IL
[2]Starfire Industries, Champaign, IL
[3]University of Illinois, Urbana-Champaign, IL

A coupled helicon/IEC plasma jet is in development for space propulsion applications. This device decouples the ionization and plasma acceleration process into separate stages. A realistic model is to consider a plasma media where the relative permittivity is negative or imaginary. Toward this end, COMSOL readily considers complex permittivity values, enabling a first attempt at modeling a ...

Modeling of Tumor Location Effect in Breast Microwave Imaging using COMSOL

E. Khosrowshahli[1], and A. Jeremic[2]
[1]School of Biomedical Engineering, McMaster University, Hamilton, ON, Canada
[2]McMaster University, Dept. of Electrical and Computer Engineering, McMaster University,
Hamilton, ON, Canada

Microwave imaging has been recently proposed as a potentially useful screening technique for breast cancer. This method detects abnormalities in the tissue based on permittivity difference between breast normal and malignant tissue. In this method breast is illuminated by high frequency electromagnetic wave, and received waves are then analyzed in order to construct a map of breast\'s ...

Material Characterization Method Development: From Education to Design Optimization

C. Morgan[1], N. Kenkare[1], M. Williams[2], A. Peterson[2], and D. Williams[2]
[1]Alcon Eye Care Division of Novartis R&D, Duluth, GA
[2]Alcon Eye Care Division of Novartis R&D and Georgia Institute of Technology Co-op Program, GA

Introduction of silicone hydrogel contact lens materials provided products of unprecedented capability to deliver oxygen to the eye during wear. One additional material characteristic of interest is the material’s permeability to ions. This paper discusses descriptive tools and optimization of an impedance method of characterizing ion permeability. A physical model of conductive paper with ...

Quick Search

2661 - 2670 of 3226 First | < Previous | Next > | Last