D. Pradeep, N. Krishnan, and H. Nemade
Department of Electronics and Communication Engineering, Indian Institute of Technology Guwahati, India
Surface acoustic wave (SAW) devices based on Rayleigh wave, shear wave, love wave, acoustic plate mode (APM) wave and flexural plate wave have been explored for sensors, actuators and telecommunication applications. An interdigital transducer (IDT) is a metallic comb-like structure fabricated over piezoelectric substrate. SAWs are generated over the substrate by applying electrical signal to the ...
A. Daoud, and N. Kandev
Institut de recherche d'Hydro-Quebec (LTE), Shawinigan, Quebec, Canada
The electromagnetic pumping (EMP) of electrically-conducting fluid is of growing interest for many industrial applications requiring precise flow control, enabling stopping or reversing flow direction without any moving parts or mechanical devices. Presented in this work are the results of a 3D numerical magneto-hydrodynamic (MHD) simulation of direct current (DC) EMP for liquid ...
I. Hoke, C. Dahmani, T. Weyh
Heinz-Nixdorf Lehrstuhl für Medizinische Elektronik, Fakultät für Elektro-und Informationstechnik, Technische Universität München, Germany
The application of nanoparticles coupled with medical agents to brain tumors remains one of the biggest obstacles in neuro scientific research. This work explores an optimal design of an electromagnet to overcome the blood-brain barrier by means of an intensive external magnetic field gradient. It is found that the field gradients depend strongly on the design of the magnet tip. The model ...
A Numerical Model for Transient Heat Conduction in Semi-Infinite Solids Irradiated by a Moving Heat Source
N. Bianco, O. Manca, S. Nardini, and S. Tamburrino
Dipartimento di Energetica, Termofluidodinamica applicata e Condizionamenti ambientali, Università degli Studi Federico II, Napoli, Italy
Dipartimento di Ingegneria Aerospaziale e Meccanica, Seconda Università degli Studi di Napoli, Aversa (CE), Italy
A numerical analysis on transient three-dimensional temperature distribution in a semi-infinite solid, irradiated by a moving Gaussian laser beam, is carried out numerically by means of the code COMSOL Multiphysics. The investigated workpiece is simply a solid. A laser source is considered moving with constant velocity along the motion direction. The convective heat transfer on the upper surface ...
L. Martinelli, and A. Lamberti
Universita di Bologna, Italy
Objective of this contribution is to show how to implement the Mild Slope Equations with COMSOL Multiphysics. These equations are commonly used to study the propagation of waves in harbors. Some interesting features are presented, namely the use of weak terms (used for the modelling of the source term); the evaluation of a smooth phase gradient from the complex dependent variable; a robust ...
Simulation of the Destruction Effects in CMOS-Devices caused by Impact of Fast Transient Electromagnetic Pulses
M. Rohe, S. Korte, and M. Koch
Institute for the Basics of Electrical Engineering and Measurement Science, Leibniz Universität Hannover, Germany
In this paper will be presented how an electronic system and its components will respond in case of an impact of an external electromagnetic pulse (EMP). In the first instance the coupling process of transient electromagnetic pulses into electronic systems will be shown. Out of that the disturbing signal inside the system, which is necessary for the following simulation, will be described ...
P. Goes, E. Hoferlin, and M. De Wulf
OCAS N.V. – ArcelorMittal Research Gent, Belgium
Finite element modelling of electrical machines usually assumes uniform magnetic properties and loss behaviour throughout the steel laminations. It is well known that manufacturing processes, like the assembly of the machine, deteriorate the properties of the core material. Generally, the measured iron losses in the machine are higher than the losses obtained under standard conditions. Taking ...
E. Le Guen, R. Fabbro, F. Coste, M. Carin, and P. Le Masson
LALP (CNRS)/GIP GERAILP, Arcueil, France
LIMATB, Université de Bretagne Sud, Lorient, France
Hybrid laser-MIG arc welding has very interesting advantages compared to laser welding or arc welding used separately. It is known that improvement of productivity results in higher welding speeds, thicker welded materials, joint fit-up allowance, better stability of molten pool, and improvement of joint metallurgical quality. In order to use these techniques efficiently in industrial ...
Maschinenbau, Verfahrens- und Umwelttechnik, TFH Berlin, Berlin, Germany
In our Master program entitled “Verfahrenstechnik / Process Engineering” the main focus is placed on the use of computational method. This paper will present the plan of a particular course entitled “Transportprozesse” (Transport Processes or Transport Phenomena). The contents of our lectures and exercises deal with mass and heat transfer, chemical reactions and fluid ...
R. Wislati , H. Haase
Leibniz Universität Hannover, Germany
In this paper an electromagnetic solenoid actuator (EMVA) consisting of an upper and lower electromagnet, a linear moving armature and two preloaded springs is considered as a potential approach in Variable Valve Actuation (VVA) Systems for Internal Combustion Engines. In opposition to common approaches the underlying EMVA make use of a permanent magnet in the upper electromagnet. The analysis ...