A. Häffelin, J. Joos, M. Ender, A. Weber, and E. Ivers-Tiffée
Institut für Werkstoffe der Elektrotechnik (IWE)
Karlsruher Institut für Technologie (KIT)
A fuel cell is an electrochemical system, which converts chemical energy into electricity by a controlled reaction of hydrogen and oxygen. The performance of the electrode is likewise determined by its material and the microstructure. The simulations were performed directly on reconstructions of real electrodes, obtained from focused ion beam (FIB) tomography. A finite element method (FEM) ...
Near-Wellbore Physics of Non-Isothermal Flow Into a Wellbore and its Application to Hydrocarbon Production
John Lovell received a Ph.D. in Electrical Engineering from Delft University in 1993 as well as MA\'s in Mathematics from Oxford and Cornell. He is currently a Business Development Manager for Schlumberger. His numerical expertise includes the creation and application of finite element algorithms for problems relating to the near-wellbore physics of hydrocarbon production from subterranean ...
S. Carcangiu, B. Cannas, M. Usai, and G. Concu
Department of Electric and Electronic Engineering, Cagliari, Italy
Department of Structural and Infrastructural Engineering and Geomatics, Cagliari, Italy
An experimental program has been developed, with the purpose of evaluating the reliability in building diagnosis and characterization of an integrated analysis of several parameters, associated with acoustic waves propagating through the material. The Direct Transmission Technique has been applied. In this paper we developed a numerical model using the Transient Acoustics-Piezoelectric ...
J. Mwebesa, D. Kalumba, and R. Kulabako
Studies by Nishaat (2009) showed that Terzaghi\'s bearing capacity model didn\'t adequately predict the bearing capacity failure in Philippi Dune sands. Nishaat carried out her investigation using a physical model that was built in a geotechnical laboratory. The failure surfaces she observed in the sands did not resemble those predicted by Terzaghi and Meyerhof\'s models. However the use of a ...
J. van Schijndel, S. Uittenbosch, and T. Thomassen
Eindhoven University of Technology
The paper presents the development of a method that determines building material and surface properties using relative simple and low-budget experiments, The method comprehends an optimal design of an experimental set up for smart determination of heat and moisture properties using both normal and inverse modeling techniques. It is concluded that the suggested methodology of the inverse ...
I. Rodriguez, and J. L. Munoz
The field quality requirements of most particle accelerator magnets are very tight and, therefore, very precise simulations are needed to accurately calculate these devices. CERN\'s ROXIE code is widely used as a reference software to calculate normal conducting and superconducting magnets for particle accelerator applications. ROXIE uses the full vector potential coupled to the BEM-FEM method ...
D. Pugal, K. Kim, and A. Aabloo
ME Department, University of Nevada Reno, Reno, NV
University of Tartu, Tartu, Estonia
Modeling electromechanical actuation of ionic polymer-metal composite (IPMC) material is considered in this work. Ionic current in the polymer is described with the Poisson-Nernst-Planck system of equations. Calculated ionic concentration is related to the deformation of the material. To include the effect of the electrodes, the ionic current and the electric current in the electrode domains is ...
A. Regtmeier, A. Weddemann, I. Ennen, and A. Hütten
Dept. of Physics, Thin Films and Physics of Nanostructures, Bielefeld University, Bielefeld, Germany
Dept. of Elect. Eng. and Comp. Science, Lab. for Electromagnetic and Electronic Syst., MIT, Cambridge, MA
Institute of Solid State Physics, Vienna University of Technology, Vienna, Austria
Superparamagnetic nanoparticles have a wide range of applications in modern electric devices. Recent developments have identified them as components for a new type of magnetoresistance sensor. We propose a model for the numeric evaluation of the sensor properties. Based on the solutions of the Landau-Lifshitz-Gilbert equation for a set of homogeneously magnetized spheres arranged in highly ...
S. Musa, M. Sadiku, and A. Emam
Roy G. Perry College of Engineering, Prairie View A&M University, Prairie View, TX
Information Systems Department, King Saud University, Riyadh, Saudi Arabia
The silicon substrate has a significant effect on the inductance parameter of a lossy interconnect line on an integrated circuit. It is essential to take this into account in determining the transmission line electrical parameters. In this paper, a new quasi-TEM capacitance and inductance analysis of multiconductor multilayer interconnects is successfully demonstrated using the finite element ...
Optimization of a High-Temperature High-Pressure Direct Wafer Bonding Process for III-V Semiconductors
R. Martin, J. Kozak, K. Anglin, and W. Goodhue
University of Massachusetts Lowell
Many optoelectronic devices utilize a heterojunction of a pair semiconducting materials including high-efficiency MEMS devices, solar cells, LEDs, and VCSELs. One fabrication technique which achieves such a device is direct wafer fusion. To optimize the process, COMSOL Multiphysics 4.0 was used to test various geometric configurations of the fixture. 2D and 3D models were created in order ...