A. Atalla, and A. Jeremic
McMaster University, Hamilton, Ontario, Canada
The inverse diffusion problems deal with the estimation of many crucial parameters such as the diffusion coefficient, source properties, and boundary conditions. Such algorithms are widely applied in many design problems in different physical, chemical, and biological fields. Recently, the estimation of the boundary properties, of the diffusion process, have attracted researchers. We first ...
Computation of the Longitudinal Dispersion Coefficient in an Adsorbing Porous Medium Using Homogenization
A. Rijnks, M. Darwish, and H. Bruining
StatoilHydro ASA, Bergen, Norway
Shell Exploration & Production International Centre, Rijswijk,
Section of Geoengineering, Faculty of Civil Engineering and Geosciences, TU Delft, Delft, The Netherlands
The method to derive upscaled expressions for the dispersion coefficients for reactive flow in a porous medium uses a periodic unit cell (PUC), which consists for instance of a spherical grain in a cube, but nothing prohibits defining more complex PUC's. Homogenization leads to a coupled system of equations where the flow is described by Stokes equation and the concentration fluctuation is ...
G.T. Martin, and L. Angelone
Hologic, Inc., Bedford, Massachusetts, USA
Massachusetts General Hospital, Harvard Medical School, Marlborough, Massachusetts, USA
The NovaSure Endometrial Ablation System® is designed to remove the endometrial lining in the uterine cavity of women who suffer from menorrhagia. The NovaSure disposable device consists of a 2-pole, 4 electrode array that is inserted into the uterine cavity and deployed. We have developed a COMSOL Multiphysics model of the NovaSure ablation process. The model utilized COMSOL Multiphysics ...
J. Gaillard, D. Locatelli, S. Mulani, and R. Kapania
Microelectronics and Micromechanics Department, Engineering school of ENSICAEN (Ecole National Superieure d'Ingénieurs de Caen), Caen, France
 Engineering Science and Mechanics Department, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
 Aerospace and Ocean Engineering Department, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
The residual stresses developed in a stiffened panel manufactured using Electron Beam Freeform Fabrication (EBF3) process were studied. EBF3 process is a layer additive process that can be used to build near-net shaped parts directly using computer controlled techniques, which can be used for aerospace structures. A COMSOL model was created to simulate the residual stresses using a thermo ...
Quasi-static Analysis on the Effect of Metal Penetrating Depth into the Substrate in Microstriplines
S. Musa, and M. Sadiku
Prairie View A&M University Networking Academy (PVNA), Prairie View, TX, USA
The effect of metallization thickness on planar transmission lines plays an essential role in microwave integrated circuits and thin film technology, especially in the propagation characterization and the electric field distribution in the structures. The objective of this paper is to consider the planar transmission lines with finite thickness not penetrating and penetrating into isotropic ...
M. de Bonis, and G. Ruocco
DITEC, Universitµa degli studi della Basilicata, Campus Macchia Romana, Potenza, Italy
Heat and mass transfer involved in drying is studied by using COMSOL 3.4. The effect of air temperature on the performance of the drying process applied to fresh food slices is scrutinized. COMSOL’s flexible formulation is exploited by using special drying kinetics for the substrate, and by including a treatment of the dependence of the properties upon the residual moisture content. The model ...
M. Itomlenskis, P. Fodor, and M. Kaufman
Physics Department, Cleveland State University, Cleveland, OH, USA
Relief patterning of the surface of microchannels has been actively pursued as a method of promoting mixing in systems with a low Reynold’s number (<<100). In this work, we explore, by using the COMSOL Multiphysics package and its Chemical Engineering Module, the possibility of enhancing the mixing quality of two fluids in a microchannel with a non-periodic fractal pattern of ridges ...
A. Zugliano, R. Artoni, A. Santomaso, A. Primavera, M. Pavlicevic
Danieli & C. Officine Meccaniche, Italy
DIPIC - Universita di Padova, Italy
A simulation of the behavior of bulk solids continuously flowing through a silo with internal flow feeders has been performed by means of a dissipative hydrodynamic model. The results obtained by these calculations and those found experimentally agree, not only with regard to the velocity profiles, but also relative to the pressure on the silo walls. The dissipative hydrodynamic model represents ...
M. Herring Jensen
Widex A/S, Vaerloese, Denmark
In this study we model the sound attenuation properties of a hearing aid earmold tube. The model includes thermoviscous acoustic effects and it couples structural vibrations to the external acoustic field. Moreover, the finite element domain is coupled at two boundaries with an electroacoustic model of a hearing aid and an acoustic 2-cc coupler.
Designing the Actuator for the Next-Generation Astronomical Deformable Mirrors: a Multidisciplinary and Multiphysics Approach
C. Del Vecchio, R. Biasi , D. Gallieni, and A. Riccardi
INAF-OAA, Fierenze, Italy
Microgate Srl, Bolzano, Italy
ADS International Srl, Valmadrera, Italy
The actuation system of the deformable mirror is one of the crucial components of an Adaptive Optics unit. One possible implementation comprehends a linear force motor and a capacitive sensor providing the feedback measure signal. Choosing a magnetic circuit that makes optimum use of the magnetic force delivered by a current and properly arranging the electrostatic geometry allows to obtain very ...