D. Borelli and C. Schenone
DIPTEM, University of Genova, Genova, Italy
The present paper describes the results of a Finite Element Model used to analyze sound propagation in lined ducts. By means of a numerical model it was possible to predict the insertion loss inside rectangular lined ducts in a frequency range from 250 Hz to 4000 Hz. The model was validated by a comparison with experimental data obtained in accordance to ISO 11691 and ISO 7235 standards. The ...
F. Cipitì, L. Pino, A. Vita, M. Laganà, and V. Recupero
The paper presents a two-dimensional model to describe the gas flow in a propane autothermal reactor, developed at the CNR-ITAE Institute, and aimed to design a Beta 5 kWe hydrogen generator, named HYGen II, to be used with Polymer Electrolyte Fuel Cells (PEFCs) for residential applications. The main aim of the mathematical model was to optimize the reactor geometrical key parameters (diameter ...
G. Louarn, M. Collet, and S. Cuenot
Institut des Matériaux Jean Rouxel, Nantes
In this work, we present the modeling of V-shaped silicon micro-cantilevers. The sensitivity of different V-shaped silicon cantilevers is estimated, as a function of the geometrical dimensions of the cantilever.
Naval Undersea Warfare Center/ Division Newport, Newport, RI, USA
The paper addresses a class of problems for modeling and consequently simulating the electromagnetic field radiation pattern from two arms Archimedes spiral coils. The frequency spatial wavelengths relative to the coil dimensions are in a range where the electromagnetic Maxwell’s equations are solved numerically via the RF Module of COMSOL ...
R.E. Tosh, and H.H. Chen-Mayer
National Institute of Standards and Technology, Gaithersburg, Maryland, USA
Primary reference standards for determining absorbed dose to water in radiotherapy beams used at cancer clinics and hospitals ultimately must make reference to the temperature change in water produced by ionizing radiation. The most direct experimental technique for this purpose is water calorimetry. Since the dose distributions delivered by such beams are nonuniform, temperature signals ...
T. Chen, and P.G. Ifju
University of Florida, Gainesville, Florida, USA
This paper describes using thermal structural interaction to model the shrinkage behavior in cement paste under drying. An inverse method of combining the finite element analysis and the least-squares method is implemented to fit experimentally determined shrinkage in order to obtain material propertiesfrom the complex geometry used in the tests. The finite element model is created in COMSOL ...
H.C. Wong, K.N. Cho, and W.C. Tang
Department of Biomedical Engineering, University of California, Irvine, California, USA
Atherosclerosis causes the deposition of plaque on the inner walls of arteries, which leads to restricted blood flow. Using the balloon angioplasty procedure, stents can be inserted and expanded in the atherosclerotic artery. We used COMSOL Multiphysics Structural Mechanics, Solid Stress-Strain module to perform static, large deformation analyses. Our results show that lower stent stresses were ...
C.B. Crawford, Y. Shin, and G. Porter
Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky, USA
Traditionally the design cycle for magnetic fields involves guessing at a reasonable conductor / magnetic material configuration, using FEA software to calculate the resulting field, modifying the configuration, and iterating to produce the desired field. Our method involved solving the classical Laplace equation on regions with imposed boundary conditions, which was implemented straightforwardly ...
B. Oetiker, B. Friedman, and H.E. Hall Jr.
Department of Physics, Sam Houston State University, Huntsville, Texas, USA
High-resolution imaging is useful in oil and gas exploration to identify producing fractures that can be in the millimeter thickness range. In principle, high-resolution imaging maybe achieved using “current injection” to measure the electrical conductivity of the formation. Two current injection devices are compared for possible use as Logging While Drilling (LWD)imaging: The ...
Fast Computation of Capacitance Matrix and Potential Distribution for Multiconductor in Non-Homogenous Multilayered Dielectric Media
S.M. Musa, and M.N.O. Sadiku
Prairie View A&M University Networking Academy, Prairie View, Texas, USA
This paper presents the fast computational and modeling of multiconductor transmission lines interconnect in non-homogenous multilayered dielectric media using the finite element method (FEM). We illustrate the potential distribution of the multiconductor transmission lines for the models and their solution time. We compared some of our results of computing the capacitance matrix with method of ...