M.A. Rojas, and V. Grechka
 University of Houston
 Shell International E&P
We present static and dynamic computations of the apparent properties for stacks of horizontal isotropic layers (VTI symmetry). The effective stiffness tensors of such media are given by the Backus theory for statics in the limit of zero thicknesses of the constituent layers. We used COMSOL Multiphysics to verify the theoretical static bounds for these effective stiffnesses.
R. Millett, J. Wheeldon, T. Hall, and H. Schriemer [1,2]
 Centre for Research in Photonics, School of Information Technology and Engineering, University of Ottawa, Canada
 Centre for Research in Photonics, Dept. of Physics, University of Ottawa, Canada
A 2D multiphysics model has been developed to simulate heterojunctions separating abruptly doped semiconductor layers of different dopant concentrations. Numerical results are presented for the case of nN, pN and PpN heterojunctions, and a general procedure for simulating multiple heterojunctions is described.
Use of COMSOL Multiphysics for Efficient, Automatic Inverse Modeling of PDE-based Systems: Applications to Aquifer Characterization
M.A. Cardiff, and P.K. Kitanidis
Inverse Modeling refers to the practice of using measurements to estimate unknown parameters of a system, under conditions in which only a model for the forward problem is given. Here, we present a framework for the inverse modeling of PDE-based systems using COMSOL Multiphysics and MATLAB. Included in our framework is an automatic adjoint state formulation, allowing for more efficient ...
R. W. Gamache, C. Rappaport, and M. Farid.
TransTech Systems inc., Northeastern University
The major impediment to detection and characterization of low dielectric contrast nonmetallic buried in soil is the distorting and masking effects of clutter from rough ground surfaces and soil volumetric inhomogeneities. In this work, a 2D FDFD code developed specifically for the buried mine problem will be compared to a commercial FEM code, COMSOL Multiphysics.
Implementation of ALE Moving Mesh for Transient Modeling of Nanowire Trajectories Caused by Electrokinetic Forces
S.M. Davison, and K.V. Sharp
Pennsylvania State University
Moving nanowires through microfluidic channels under electrokinetic forces can be a valuable technique to aid in the fabrication of certain devices. The trajectories of a nanowire under the influence of an externally applied electric field have been modelled through a straight channel, through a converging channel, and around a 90° corner. In a straight channel, a nanowire initially ...
This presentation summarizes three different types of modeling using COMSOL Multiphysics. It is divided into three parts: Compressible flow, Multiphase flow, and Plasma Simulations. For the first part, we perform a special case study of the Mass Flow Verifier. A Mass Flow Verifier validates the accuracy of a Mass Flow Controller by measuring the rate of change of pressure in a fixed volume. ...
Y.L. Rao, and G. Zhang[1-3]
 Micro/Nano Bioengineering Laboratory, Department of Biological and Agricultural Engineering, The University of Georgia
 Nanoscale Science and Engineering Center, The University of Georgia
 Faculty of Engineering, The University of Georgia
Integration of surface acoustic wave (SAW) devices with nanostructures has gained interest in the development of sensors with high sensitivity. To better design nanostructure integrated SAW devices, it is essential to model three dimensional (3-D) SAW devices and analyze the wave propagation characteristics in nanostructure-enhanced SAW devices. In this work, a 3-D finite element model of ...
Study of the Electric Field Intensity in Bushing Integrated ZnO Surge Arresters by Means of Finite Element Analysis
Shahid Abbaspour (PWUT) University of Technology, Tehran, Iran
In this paper, the electric field in different types of ZnO surge arresters has been investigated by means of finite element modeling using COMSOL Multiphysics. Both conventional and novel built-in-bushing type arresters were studied. Electric field modeling helps designers consider important factors affecting the maximum field intensity in the arrester, avoiding damages to the arrester ...
Yuhua Duan1,2, Dan C. Sorescu1 and J. Karl Johnson1,3
1National Energy Technology Laboratory, 2Parsons Project Services Inc.,3Department of Chemical Engineering
Microwave sintering has been applied to a wide variety of, and recent experimental results have showed that for semi-metal or magnetic materials, the magnetic field (H) can have a significantly larger contribution than the electric field (E) during sintering. We have employed COMSOL Multiphysics to simulate the sintering process by adding the magnetic field contribution into the heating source. ...
D.O. Ludwigsen, C. Jewett, and M. Jusczcyk
Students encounter cavity resonance and waveguide phenomena in acoustics courses and texts, where the study is usually limited to cases with simple geometries: parallelepipeds, cylinders, and spheres. At Kettering University, we are beginning to employ finite element modeling in our acoustics classes to help undergraduates better understand the acoustic modes of actual structures. This ...