Presentazioni e Articoli Tecnici

In questa sezione troverete i lavori presentati alle Conferenze mondiali COMSOL. Le presentazioni descrivono ricerche e prodotti innovativi progettati con COMSOL Multiphysics da colleghi di tutto il mondo. I temi delle ricerche presentate abbracciano un'ampia gamma di settori produttivi e aree applicative, in ambito elettrico, meccanico, fluidodinamico e chimico. Lo strumento di Ricerca Rapida vi permetterà di trovare le presentazioni che si riferiscono all'area di vostro interesse.

High Frequency Electromagnetic Device Modeling with COMSOL: Simulation vs. Experiment

P. Alotto[1], F. Dughiero[1], F. Bressan[1], M. Bullo[1]
[1]Università di Padova, Dipartimento di Ingegneria Industriale, Padova, Italy

Computer simulation is mandatory for the optimization of electromagnetic devices. Here we concentrate on two classes of devices operating in the MHz and GHz range, namely microwave ovens and TEM cells for electromagnetic compatibility testing. In particular we concentrate on the issue that numerical results are usually different from the experimental ones and this can be due, among others ...

Heat Transfer Models for Microwave Thawing Applications

S. Curet, O. Rouaud, and L. Boillereaux
ENITIAA, GEPEA – UMR, Nantes

This study deals with numerical and experimental investigations of a microwave thawing process. The microwave power generation is calculated from Maxwell’s equations and then from Lambert’s law, using COMSOL Multiphysics. For those two different approaches, the heat source term depends on the dielectric properties of the material. Numerical simulations are compared with experimental ...

Modeling of Tumor Location Effect in Breast Microwave Imaging using COMSOL

E. Khosrowshahli[1], and A. Jeremic[2]
[1]School of Biomedical Engineering, McMaster University, Hamilton, ON, Canada
[2]McMaster University, Dept. of Electrical and Computer Engineering, McMaster University,
Hamilton, ON, Canada

Microwave imaging has been recently proposed as a potentially useful screening technique for breast cancer. This method detects abnormalities in the tissue based on permittivity difference between breast normal and malignant tissue. In this method breast is illuminated by high frequency electromagnetic wave, and received waves are then analyzed in order to construct a map of breast\'s ...

A finite–element simulation study of the complex effective permittivity of two-phase random composite materials

Brosseau, C.
Laboratoire d'Electronique et Systèmes de Télécommunications, Université de Bretagne Occidentale, Brest, France

In the current work we introduce a finite-element method (FEM) for calculating the effective permittivity of macroscopically inhomogeneous media. Specifically, we consider two-dimensional (2d) two-phase heterostructures consisting of hard circular disk equilibrated distributions. The hard-disk distribution has been chosen as the reference system since it is one of the simplest idealized models ...

A finite–element simulation study of the complex effective permittivity of two-phase random composite materials

Brosseau, C.
Laboratoire d'Electronique et Systèmes de Télécommunications, Université de Bretagne Occidentale, Brest, France

In the current work we introduce a finite-element method (FEM) for calculating the effective permittivity of macroscopically inhomogeneous media. Specifically, we consider two-dimensional (2d) two-phase heterostructures consisting of hard circular disk equilibrated distributions. The hard-disk distribution has been chosen as the reference system since it is one of the simplest idealized models ...

Microwave Heating of Chemical Reaction System with Complex Permittivity

M. Hashiguchi
Keisoku Engineering System Co., Ltd., Tokyo, Japan

Heating mechanism of reactive system under microwave irradiation is computationally studied. TE10 incident wave (2.45GHz and 500W) through a rectangular waveguide and a one step global reaction, A+B=>C, are considered here. It is assumed that the reactants A and B have a complex permittivity and the product C has only real part of permittivity. The governing equations are solved by using COMSOL ...

Propagation of Higher Order Modes in Optical Fibers

J.T. Andrews, R.R. Kumar, and P.K. Sen
Department of Applied Physics, S G S Institute Technology & Science, Indore, Maharashtra, India

Understanding higher order mode generation in optical fibers has the following advantages: (i) Supercontinuum generation is possible (ii) Various fiber optic sensors may have increased sensitivity and (iii) dispersion management as well as optimization is possible with appropriate control of higher order modes. We took simple cases where single mode and multimode fibers (SMF/MMF) are used. ...

Design Optimization of Slotted Waveguide Antenna Stiffened Structures (SWASS)

T. Ha, and R.A. Canfield
Virginia Polytechnic Institute and State University, Blacksburg, VA, US

Design optimization of slotted waveguide antenna stiffened structures (SWASS) is described. SWASS is a multidisciplinary blending of RF slotted waveguide technology and stiffened composite structures technology. Structural analysis and radio frequency (RF) analysis are integrated. A hat-type stiffened panel is modeled to meet the structure and RF requirements. We are motivated by the potential of ...

Quick Search

151 - 158 of 158 First | < Previous | Next > | Last