Multiphysics Simulation of Thermoelectric Systems - Modeling of Peltier-Cooling and Thermoelectric Generation
Fraunhofer-Institute for Physical Measurement-Techniques (IPM), Freiburg, Germany
Electro-thermal interaction is commonly considered only as a matter of joule heating. In addition, the Seebeck-, Peltier- and Thompson-Effects are significant in materials with high thermoelectric figure of merit Z. These thermoelectric materials have a high Seebeck-coefficient α, a good electric conductivity σ, and a poor thermal conductivity λ. They have widespread areas of ...
University of Turku, Turku, FInland
An experimental LED light composed of a multi-chip LED-module, a LED driver and an efficient heat sink, was investigated using COMSOL Multiphysics software and the Heat Transfer Module. In an LED light heat is mainly generated in the LEDs but some amount of heat is generated also in the LED driver. The main target of the simulations was to resolve the junction temperatures of LEDs, the most ...
G. R. Prakash, K. M. V. Swamy, S. Huddar, B. G. Sheeparamatti, Kirankumar B. B.
Basaveshwar Engineering College, Bagalkot, Karnataka, India
The focus of this paper is to study the effect on resonance frequency and power enhancement techniques of piezoelectric MEMS and modeling, design, and optimization of a piezoelectric generator based on a two-layer bending element(Figure 1) using COMSOL Multiphysics. An analytical relation was developed based on the shift in resonance frequency(Figure 2) caused by the addition of a thin film ...
Rachita Shettar, Dr. B G. Sheparamatti
Basaveshwar Engineering College, Bagalkot, Karanataka, India
In this paper modeling and simulation results of a thermal bimorph is capable of producing increased displacement for increasing temperatures are presented. Thermal bimorphs are popular actuation technology in MEMS (Micro-Electro-Mechanical Systems). Bimorph actuators consist of two materials with different coefficients of thermal expansion. The main objective of this work is to investigate the ...
Heat Transfer and Phase Transformation on Matrix Assisted Pulsed Laser Evaporation (MAPLE) of Biocompatible Thin Layers
E. Lacatus, G.C. Alecu, M.A. Sopronyi, A. Tudor
POLITEHNICA University of Bucharest, Bucharest, Romania
INFLPR -National Institute for Laser Plasma and Radiation Physics, Bucharest, Romania
Matrix Assisted Pulsed Laser Evaporation (MAPLE) technique is used for the deposition of high quality biocompatible polymer thin films. During the deposition process the temperature of the laser target should be kept below 193K to assure the proper quality of both evaporation and deposition phases of the process. On a first approach COMSOL Multiphysics® was used to describe and analyze the ...
W. Raja, A. Alabastri, S. Tuccio, R. Proietti Zaccaria
Department of Nanostructures, Istituto Italiano di Tecnologia, Genova, Italy
Surface plasmon resonance (SPR) sensors proved themselves as a promising device for many kinds of applications such as optical biosensing, binding constant determinationor nanofilm thickness measurements. Here we simulate using COMSOL Multiphysics® the light-polaritons coupling for the two most commonly used SPR setups: Attenuated total reflection (Kretschmann configuration) and diffraction ...
Esaote SpA, Florence, Italy
Pulse-echo FEM simulation is seldom found in literature for ultrasound imaging array probes, since the complete modeling of such device is extremely complicated. Nevertheless, the 2D FEM described in the present work was successful, thanks to the following design procedure (see figure): Two piezoacoustic models were employed, one for transmission of the pressure wave into the acoustic domain, ...
J. Soons[1,2], C. Steele, S. Puria
Lab of Biomedical physics, University of Antwerp, Antwerp, Belgium
Department of Mechanical Engineering, Stanford University, Stanford, USA
Sound vibrations are collected from the external environment by the eardrum and are guided to the basilar membrane in the cochlea. Pressure differences in the two scalae of the cochlea result in a traveling wave on the basilar membrane. The tiny displacements are detected by the deflection of thousands of hair cells, situated along this membrane. It is hypothesized that some 3/4 of these hair ...
V. Bhatt, R.S Rautela, P. Sharma, D.C. Tiwari, and S. Khushu
Institute of Nuclear Medicine & Allied Sciences (DRDO), Delhi, India
The Helmholtz Coil generates a uniform magnetic field. The commercially available large-size Helmholtz coils prove to be very expensive. This paper describes the economical method of designing and construction of a Helmholtz coil. COMSOL Multiphysics AC/DC Module simulated results and actual results were compared in this study. The coil serves as a component in the system for Hyperpolarisation of ...
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 ...