O. Vogel, and J. Ulm
Proportional solenoids are well-known and used in a wide range of applications today. This paper is about methods of influencing the characteristic force-stroke-curves of magnetic actuators by means of different pole geometries. The conical design of the stator pole which is mostly used to accomplish proportional solenoids is analyzed by both a simple analytic reluctance model and a FEM model ...
Lamb Waves and Dispersion Curves in Plates and It’s Applications in NDE Experiences Using Comsol Multiphysics
P. Gómez, J. P. Fernandez, and P. D. García
Hydro-Geophysics & NDE Modeling Unit
University of Oviedo
In this paper, a model for numerically obtaining lamb wave modes and dispersion curves in plates is presented. It is shown that COMSOL Multiphysics can be employed to simulate the behavior of guided waves in dispersive plates, which is useful for NDE applications. A two dimensional steel plate (4x0.1 meters) is excited with a space-time impact point source. To model the point source, we use ...
I. Avram, and I. Gavril Tarnovan
The Technical University of Cluj Napoca
This paper presents a study on the propagation modes of electromagnetic waves through a step index fiber optics. To analyze the propagation of electromagnetic field, a simulation in Comsol 4.0 has been implemented using two different optical fibers. Obtaining the propagation modes, called linearly polarized modes (LPnm) to get their characterization according to the radial and azimuthal ...
M. Bianchi Janetti, and F. Ochs
University of Innsbruck
Unit Building Physics
The simulation of heat and moisture transfer represents an essential resource in designing energy efficient buildings. In this paper a time-dependent wall model, consisting of several homogeneous domains, with third-type boundary conditions imposed on the surfaces, is implemented in the COMSOL Multiphysics environment. Temperature and moisture content is calculated inside the construction for ...
L. Spicci, and M. Cati
The present paper describes the development of a full FEM model for linear array high performance 5MHz ultrasound imaging transducer. As a preliminary design, a mono dimensional electro-acoustical KLM model was realized, then the complete FEM was developed and optimized. The optimized transducer was manufactured, so that agreement between transducer measured performances and simulation results ...
M. Herlitschke, M. Blasl, and F. Costache
Fraunhofer Institute for Photonic Microsystems
3D FEM simulation of millimeter-scale, complex electro-optically induced waveguide based devices demands the use of grids with more than several million nodes. Hence the simulation could take substantial time and require large amounts of available memory. This paper presents a computation algorithm based on the conversion of an initial 3D waveguide structure into an analogous 2D structure, ...
J. Förster, and H. Vogt
Institute of Electronic Components and Circuits
A one-dimensional model of Excimer Laser-Annealing of amorphous silicon layers which are irradiated with a KrF excimer laser is described. For realisation, the application mode heat transfer in solids is used. The model predicts a melt threshold for the energy density of the laser of 88.5 mJ/cm^2. It also predicts a linear increase of the melt duration with a slope of approximately 625 ...
M. Goncalves, T. Makaryan, G. Papageorgiou, U. Herr, and O. Marti
Ulm University - Inst. of Experimental Physics, Ulm, Germany
Yerevan State University, Yerevan, Armenia
Ulm University - Institute of Micro and Nanomaterials, Ulm, Germany
Surface enhanced Raman scattering (SERS) investigations of silver and gold triangular nanoparticles reveal strong field enhancements at the corners of the particles. Though the measurements were done at wavelengths far from the surface-plasmon resonance of the particles, large field enhancements can be generated by near-field coupling between the triangular particles and smaller metal ...
Military University of Technology
The article presents the process of verification of the passive magnetic bearing by the Comsol Multiphysic program. There is shown construction of the radial passive magnetic bearing PMB60x85x20-5, which was designed in the Military University of Technology. The distribution of the magnetic flux density and the static characteristic of the bearing were estimated by the Comsol Multiphysic. The ...
H. Ye, E. M. Boudoudou, E. Scholz, and M. Clemens
Chair of Electromagnetic Theory
Bergische Universität Wuppertal
For PE insulated cables both the temperature difference ?T and the electric field coefficient ? have a significant influence on the electric field distribution because PE has a nonlinear electric conductivity which is approximately a function of the temperature and the electric field strength. The coupled electric-thermal simulations are carried out for PE insulated HVDC-cables. The influence ...