V. Mathur, J. Li, and W.D. Goodhue
Photonics Center, Department of Physics and Applied Physics, University of Massachusetts, Lowell
In this work a micro-cantilever optical-MEMS sensor based on the AlGaAs system is designed and modeled. The device consists of two micro-cantilever beams perfectly aligned with the free ends separated by approximately 200 nm up to 2000 nm. The finite element method (FEM) (COMSOL Multiphysics) has been employed here to model the structural deformation and light propagation through the device. ...
COMSOL Modelling of the Gas Mixing Process in a Ripple Reducer for NPL’s Time Division Dilution System
J. Wang, B.A. Goody, and M.J.T. Milton
National Physical Laboratory, Teddington, Middlesex, UK
The mixing process of a ripple reducer designed for a time division dilution system (TDD) that dynamically generates calibration gas mixtures is modelled in 2D using COMSOL Multiphysics. The model can been used to visualize and optimize the mixing process and extract parameters of interest at chosen times and positions. The simulated time response of an analyte concentration agrees with ...
O. Falou , J.C. Kumaradas, and M.C. Kolios[1,2]
 Dept. of Electrical and Computer Engineering, Ryerson University
 Dept. of Physics, Ryerson University
A finite-element model of wave propagation using COMSOL Multiphysics has been developed to solve the problem of ultrasound scattering from spherical structures. This model will be used to predict ultrasound backscatter from cells for ultrasound tissue characterization, and scattering from microbubble contrast agents. In this paper, we discuss an improvement to our model by using a ...
M. Bikdash, S. Karagol, and M. Charifa
Department of Electrical Engineering, North Carolina A&T State University
Tools are developed that mine the mesh and simulation data provided by the finite-element mesher and solver in COMSOL. The tools developed are used in two applications. In the first, a thermal system is decomposed and an equivalent circuit (EC) is developed for reduced order modeling. In the second application which arises in robotics, the COMSOL mesh is used to plan paths of the robot ...
S.D. Ekpe, F. Jimenez, and S.K. Dew
University of Alberta, Edmonton
This work is focused on the coupling of a Monte Carlo code with COMSOL Multiphysics conduction/convection, and electrostatic modules in solving fluid-Poisson model for the plasma properties for a practical DC magnetron low pressure plasma discharge. The magnetostatic module was used in calculating the required magnetic field.
Mathematical Frame-work for the Productivity Index of Wells with Fast Forchheimer (non-Darcy) Flow in Porous Media
E. Aulisa , A. Ibragimov, P. Valko , and J. Walton
 Texas Tech University, Department of Mathematics and Statistics
 Texas A & M University, Department of Petroleum Engineering
 Texas A & M University, Department of Mathematics
In the current paper, similar features for fast or turbulent, non-linear flows subjected to Forchheimer equations are analyzed. Under some hydrodynamic and thermodynamic constrains, it has been shown that there exists the so called pseudo-steady state regime for Forchheimer flows in reservoir media. This invariant is called diffusive capacitance, which is the mathematical model for the well ...
J.R. Pascault, and H.S. Zhou
Worcester Polytechnic Institute, Department of Chemical Engineering, Microfluidics and Biosensors Laboratory
In this study, we show that the specific DNA hybridization is diffusion limited; whereas the non-specific hybridization is reaction limited. By means of an electrical field, DNA is put in motion. It results in an overallenhancement of the kinetics and a better ratio of specific hybrids over total hybrids.
Z. Shi, X. Wang, and Z. Zhang
Oakland University, Rochester, MI
Two different two-dimensional mathematical models of the one PEM fuel cell are modeled using COMSOL Multiphysics, each considering a different cross-section. The first Models considers the influence of fluid behavior in the channel, while the second considers the interdigitated flow pattern. Results, including the mass concentration, the polarization curve, potential distribution and velocity ...
W. Huang, X. Huang, and K. Reifsnider
Connecticut Global Fuel Cell Center, University of Connecticut
Meso-scale structures significantly influence fuel cell performance and durability. We have modelled the multiphysics processes in the solid oxide fuel cell cathode-electrolyte interfaces considering the detailed distribution and geometry of the ionic conducting phase, the electronic conducting phase, and the pores. The model is solved using COMSOL Multiphysics and results provide ...
J. Cheng, K.V. Sharp, and M.M. Mench
The Fuel Cell Dynamics and Diagnostics Laboratory and the Microscale Flow Laboratory, Department of Mechanical and Nuclear Engineering, Pennsylvania State University
The dynamics of fuel cell coolant flow with charged nanoparticles were modeled using COMSOL Multiphysics. A computational fluid dynamics physicochemical model of the multi-phase coolant flow has been formulated. For nanoparticles in the fluid, electrokinetic force, hydrodynamic force, and buoyancy forces have been taken into account for the prediction of electrodeposition rate onto channel ...