Determination and Verification of the Forchheimer Coefficients for Ceramic Foam Filters using COMSOL CFD Modeling
M.W. Kennedy, K. Zhang, J.A. Bakken, R.E. Aune
Norwegian University of Science and Technology, Trondheim, Norway
Experiments have been conducted with water at velocities from ~0.015-0.77 m/s to determine the permeability of 50 mm thick commercially available 30, 40, 50 and 80 Pores Per Inch (PPI) Ceramic Foam Filters (CFF) used for liquid metal filtration. Measurements were made using two different setups, for use with the Forchheimer equation: 49 mm \"straight through\" and 101 mm diameter \"expanding ...
Optimization of Thermal Properties Identification of Complex Thin Films Using MATLAB® and COMSOL Multiphysics
N. Semmar, B. Wane
GREMI, UMR7344, CNRS-University of Orleans, Orléans Cedex 2, France
The importance of laser processing and thermal properties investigation of bulk materials and thin layers is still increasing. For thermal properties investigation many experimental systems were developed based on the photothermal effect. One of typical ways is to induce a rapid surface temperature increase is to use a pulsed laser beam, create a simplified model of this interaction, and compare ...
A Simplified Numerical Model for Simulating Sliding Door and Surgical Staff Movement in an Operating Theater
Dipartimento di Energetica, Università di Firenze, Firenze, Italy
This paper deals with a numerical investigation on sliding door and people moving effects on the indoor climate of a standard ISO5 class OT with an ultraclean air filter system and a total ceiling unidirectional diffuser. A simple method to analyze the effects on the OT climate by different sliding door conditions combined with crossing persons and persons with a stretcher crossing is provided. ...
W. Wang, K. Genc
University of Massachusetts, Lowell, MA, USA
Simpleware, Exeter, United Kingdom
During the past decade reverse engineering has become a common and acceptable practice utilized by many aftermarket suppliers, and even original equipment manufacturers (OEM). This presentation focuses on the applications of multiphysics software such as COMSOL and Simpleware® in reinventing the design details and manufacturing processes of an existing part in the absence of the original design ...
F. Figueroa, P. Aguirre
Sensor Technik Wiedemann GmbH, Kaufbeuren, Germany
Circuit board failures are often ignored because they could be impreceptible. This simulation examines how internal layers around a soldered pin via subject to temperature changes during the soldering process are affected, show the forces involved and determine breaking points. A 2D thermo-mechanical model of a soldered pin is achieved in two simulation steps. First, a connecting pin already ...
A. Daneryd, D. Ericsson
ABB Corporate Research, Västerås, Sweden
COMSOL AB, Stockholm, Sweden
For certain classes of scientific and technical computations the cloud may offer easily accessible, scalable, and affordable gigantic computing power. A power that for these classes may lead to a step change in model and analysis complexity compared to what is feasible with dedicated clusters and similar networked solutions. Acoustics with or without interaction with coupled physics fields ...
Heat Propagation Improvement in YBCO-Coated Conductors for Superconducting Fault Current Limiters - new
D. M. Djokic, L. Antognazza, M. Abplanalp, M. Decroux
DPMC, University of Geneva, Geneva, Switzerland
ABB Corporate Research Centre, Dättwil, Switzerland
YBCO Coated Conductors (CCs), used for applications in Resistive Superconducting Fault Current Limiters (RSFCLs), are known to have insufficiently high Normal Zone Propagation Velocity (NZPV) during quench events. The improvement can be made by enhancing the thermal conductivity of YBCO-CCs with no decrease in the electrical resistivity. We studied the advantage of multilayered structures grown ...
H. P. Ferreira, A. Endalecio, E. Rodriguez, R. M. Stephan
Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
Levitation has found important applications in several areas of engineering, from microgravity to transportation systems. Electrodynamic levitation consists of the interaction of a varying in time magnetic field – provided by an alternating voltage supplying a coil or a moving permanent magnet. The main applications of this technique are MagLev trains and magnetic bearings. The electrodynamic ...
Optimization of Bending-Type Ultrasonic Transducers with Rotational Symmetry Using COMSOL Multiphysics®
M. Jungwirth and M. Rabl
Wels School of Engineering, Upper Austria University of Applied Sciences, Wels, Austria
Ultrasonic sensors are commonly used for a wide variety of non-contact presence, proximity or distance measuring applications in industry, especially the automotive branch. This paper shows how the radiation properties of bending-type ultrasonic transducers with rotational symmetry depend on shape, dimensions and material parameters. In order to determine their dependencies, the behavior of such ...
P. Piskur, W. Tarnowski, and K. Just
Koszalin Technical University, Koszalin, Poland
In this paper a poly-optimization of the design of the electromechanical actuator is presented. The shape of the actuator is defined by the decision variables. The number of decision variables under consideration is up to ten but in the next step while the multi-coils system will be analyzed the number of decision variables will increase up to hundred, so the genetic algorithm has been used. The ...