E. P. Furlani, N. M. Litchinitse, and R. Biswas
The Institute for Lasers, Photonics and Biophotonics, University at Buffalo, Buffalo, New York, USA
Department of Electrical Engineering, The State University of New York at Buffalo,Buffalo, New York, USA
We present a study of an optofluidic biosensor. The sensor operates in a transmission mode wherein detection is based on a shift in the transmission spectrum caused by the contrast in refractive index between the carrier fluid and the target biomaterial. We study the behavior of the sensor using 2D full-wave electromagnetic analysis, and perform parametric studies of sensitivity as a function of ...
Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
Design and safety analyses are underway to convert the High Flux Isotope Reactor (HFIR) at the Oak Ridge National Laboratory (ORNL) from a high-enriched uranium (HEU) fuel to a low-enriched uranium (LEU) fuel. The primary constraint for the project is that the overall fuel plate dimensions and the current neutron flux performance must remain unchanged. This allows minimal impact on the facility ...
P. Ghods, K. Karadakis, O. B. Isgor, and G. McRae
Carleton University, Ottawa, Ontario, Canada
Corrosion of rebar in concrete is one of the most prominent durability problems in reinforced concrete, especially where de-icing or seawater salts come into contact with the structures. Previous electrochemical and microscopic investigations have shown that local crevices between the mill scale and the underlying steel surface accelerate the corrosion initiation of rebar in concrete. Steel ...
Effect of Antennae Polarization Relative to Tunnel Orientation on Electromagnetic Wave Scattering due to Underground Tunnels
A. Farid, and T. Raza
Civil Engineering, Boise State University, Boise, Idaho, USA
Illegal immigrants and smugglers frequently use underground tunnels to avoid border security and checkpoints. In addition, the threat of international terrorism has recently made the effort to detect tunnels a national security priority. No single technology and sensing modality is capable of detecting tunnels in all heterogeneous soils environments. The goal of this research is to study and ...
M.G. Levy, X. Liang, R.M. Stratt, and P.M. Weber
Department of Chemistry, Brown University, Providence, Rhode Island, USA
Identifying molecules requires associating molecular structures with their electronic energy levels. In this paper we introduce a novel technique for the calculation of molecular Rydberg levels. The technique allows for easy visualization of the associated wavefuntions to make unambiguous assignments. The value calculated for the 3p state of trimethylamine is most closely in agreement with recent ...
3M Canada Company, London, Ontario, Canada
The collection efficiency of aerosol particles on a ribbon in a turbulent flow is analyzed using COMSOL Multiphysics. The flow field is solved using Chemical Engineering module and particle tracing plots are obtained using equations of motion including Khan and Richardson drag force. A MATLAB script is used to count the captured particles on the ribbon and determine the capture efficiency with ...
G. Bonmassar, and A. Golby
AA. Martinos Center, Massachusetts General Hospital, Charlestown, Massachusetts, USA
Department of Neurosurgery, Brigham and Women’s Hospital, Boston, Massachusetts, USA
A new type of MRI compatible intracranial electrode based on Polymer Thick Film (PTF) is presented and studied using COMSOL Multiphysics. The geometry considered was a two-dimensional cross section cut of 5 mm thick electrodes with 5 cm leads on top of a 2×10 cm slab representing Gelfilm, or the substrate. The resistive leads were compared with metallic leads to estimate the ...
Boundary conditions in multiphase, porous media, transport models of thermal processes with rapid evaporation
A. Datta, and A. Halder
Biological and Environmental Engineering, Cornell University, Ithaca, New York, USA
In modeling of thermal processing of biological materials with rapid evaporation, it is critical to provide boundary conditions consistent with the phenomena happening at the surface to accurately predict spatial temperature and moisture content for quality and safety assurance. Boundary conditions in a mathematical model are as important as governing equations itself and describe how the heat ...
TM Wave Propagation in Optical Nanostructures with a Third-Order Nonlinear Response: Modeling and Validation with COMSOL
A. Kildishev, E. E. Narimanov
Birck Nanotechnology Center, School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana, USA
An enhanced method is used for analysis of third-order nonlinearities in optical nanostructures with scalar TM (H-field) frequency domain formulation. After embedding it in COMSOL Multiphysics it is shown to produce fast and accurate results without superfluous vector E-field formalism. A standard TM representation based on cubic non-linear susceptibility χ(3) results in an intractable ...
M. V. Kisin, R. G. W. Brown, and H. S. El-Ghoroury
Ostendo Technologies, Inc., Carlsbad, CA, USA
We present a modeling software package developed at Ostendo Technologies for analysis and design of semiconductor laser and light-emitting diodes. The current database of material parameters supports complete group of III-Nitride alloys used in visible spectrum applications and can be readily extended to all III-V compounds. Self-consistent multi-band quantum-mechanical model for carrier energy ...