G.G. Gentili, S. Pietralunga, M. Bolzoni
Politecnico di Milano, Dipartimento di Elettronica e Informazione, Milano, Italy
INFN-CNR, Istituto di Fotonica e Nanotecnologie, Milano, Italy
Grating-assisted optical coupling into long-range modes of strip plasmonic waveguides is analyzed by a 3D numerical simulation with COMSOL Multiphysics. We used the RF Module and its scattering formulation. A comparison with results obtained using the common 2D approximated analysis is shown for the case of 1D grating coupler and input Gaussian beam. Excited diffracted modal field distribution ...
Optimizing Performance of Equipment for Thermostimulation of Muscle Tissue using COMSOL Multiphysics
J. Kocbach, K. Folgerø, L. Mohn, O. Brix
Christian Michelsen Research, Bergen, Norway
Luzmon Norway, Bergen, Norway
Michelsen Medical, Bergen, Norway
The design challenge for thermostimulation equipment is to get a combination of high electric field strength and high temperature within the muscle tissue without causing pain or skin burns. In the present work, COMSOL Multiphysics is used to simulate the temperature distribution and electric field distribution within body tissue for varying body composition and varying design parameters of the ...
R. Costley, H. Diaz-Alvarez, M. McKenna, A. Miller
U.S. Army Engineer Research and Development Center, Vicksburg, MS, USA
Two finite element models have been developed to investigate the acoustic radiation from a Pratt truss train bridge. The first model was a time dependent structural model that determined the vibration response of the structure due to two wheels, representing a single axle, moving across the bridge at constant speed. This model was expanded to include multiple axles to represent a locomotive. The ...
N. Badi, R. Mekala
Department of Physics, Center for Advanced Materials, University of Houston, Houston, TX, USA
Department of Electrical & Computer Engineering, University of Houston, Houston, TX, USA
Thermally conducting but electrically insulating materials are needed for heat-sink LED lighting applications. We report on a cost effective and innovative method based on creating core-shell nanoparticles in polymer with aluminum (Al) nanoparticles as the high thermal conductivity core and ultrathin aluminum oxide (Al?O?) as a capping shell. The solid oxide shell around the Al core prevents ...
AC Electroosmosis and Dielectrophoresis for Trapping Spherical Particles between Rectangular and Triangular Electrodes
S. Narayan, H. Francis, S. Ghonge, D.N. Prasad, A. Sethi, S. Banerjee, S. Kapur
Department of Physics, Birla Institute of Technology and Science, Pilani, Hyderabad Campus, Hyderabad, Andhra Pradesh, India
Department of Biological Sciences, Birla Institute of Technology and Science, Pilani, Hyderabad Campus, Hyderabad, Andhra Pradesh, India
We describe methods and results of simulations done for predicting behavior of particles in an aqueous solution under an applied AC electric field on electrodes of rectangular and triangular shapes. Here the two major effects which come into play are Dielectrophoresis and AC Electroosmosis. Two simulations have been presented, one for rectangular and one for triangular shaped electrodes. We have ...
Lawrence Berkeley National Laboratory, Hayward, CA, USA
A pocket-size portable particle size detector for diesel and cigarette smoke aerosols is being designed using particle size and composition methods. Aerodynamics, fluid properties, material composition and aerosol composition are taken into account. Testing methods for the design include using an impactor and virtual impactor with two quartz crystal resonators to determine particle composition ...
J. Heinonen, M. Erdmanis, I. Tittonen
Aalto University, Department of Micro- and Nanosciences, Espoo, Finland
We present a simplified 3D model that simulates the operation of a linear microscale integrated ion trap. It employs a set of metalized electrodes, which are formed on top of an insulator layer on silicon substrate. The confinement in all three dimensions is provided by the application of the specific AC and DC voltages to the corresponding trap electrodes. The distribution of the trapping ...
D. Papasidero, F. Manenti
Politecnico di Milano, Dipartimento di Chimica, Materiali e Ingegneria Chimica “Giulio Natta”, Milano, Italy
One big challenge for the food industry is to predict and optimize flavors. The Maillard reaction occurs in food matrices containing carbohydrates and proteins under specific operating conditions. The presented research couples thermal and kinetic modeling to the bread baking process, an ideal field to study this complex set of reactions responsible for many bread flavors. The thermal model ...
Ritsumeikan University, Kyoto, Kyoto, Japan
Vertical axis wind turbine has low rotation performance compared with that of horizontal axis wind turbine. This study proposes a new blade shape for vertical axis wind turbine effective for wide range of wind speed. Results obtained from a numerical COMSOL simulation and wind tunnel experiments show the proposed new blade profile has higher performance as compared with conventional blade ...
COMSOL Multiphysics® Simulation of Energy Conversion and Storage Concepts Based on Oxide Crystals - new
C. Cherkouk, M. Zschornak, J. Hanzig, M. Nentwich, F. Meutzner, M. Urena, T. Leisegang, D. C. Meyer
Institute of Experimental Physics, Technische Universität Bergakademie, Freiberg, Germany
Fraunhofer-Technologiezentrum, Freiberg, Germany
A mathematical model based on a finite element method (FEM) is presented as an initial approach for a system converting waste heat energy into chemical energy. This system consists of a pyroelectric LiNbO3 plate placed into a cylinder which undergoes a laminar water flow with an appropriate periodic heat source. It solves the heat transfer equation in non-isothermal flow, where the density of ...