A. Traidia, and F. Roger
AREVA NP, Technical Center, Saint Marcel, France
ENSTA Paristech, Paris, France
Using COMSOL Multiphysics, a finite element model is introduced in this paper to describe the couplings between the welding arc and the weld pool dynamic in pulsed gas tungsten arc welding. The cathode, arc-plasma and melting anode regions are taken into account. The unified time-dependent model describes the heat transfer, fluid flow and electromagnetic fields in the three regions. The ...
J.S. Crompton, L.T. Gritter, S. Yushanov, K.C. Koppenhoefer, and D. Magyari
AltaSim Technologies, LLC, Columbus, OH, USA
Golden Acoustics, Detroit, MI, USA
The preferred acoustic response of recording studios, auditoriums and conference halls is to have an even energy response over the entire room and throughout full audio spectrum. This can be accomplished by using acoustic panels with complex surface structures that scatter acoustic waves and diffuse sound level variability over the room volume or through the use of sound absorbing materials to ...
C. Strozzi, P. Gillard, and J-M. Pascaud
Institut PRISME, Bourges, France
The aim of this work is to present a simple multiphysics simulation using COMSOL able to describe combustion of kerosene vapours in a closed vessel. The emphasis is on the mechanical effects of the reactive processes. The evolution of the thermodynamical variables (pressure, temperature, concentrations…) is obtained by solving several coupled transport equations for: the mass continuity, the ...
A. Castellano, P. Foti, A. Fraddosio, S. Marzano, M.D. Piccioni, D. Scardigno
DICAR, Politecnico di Bari, Bari, Italy
Introduction: Improving the capability of nondestructive evaluations requires the analysis of suitable models dealing with the physical and mechanical phenomena involved in the experiments. For example, ultrasonic tests may be a powerful, fast and effective method for nondestructive characterization of mechanical properties of materials. This requires the study of the related elastodynamic ...
A Study of the Effects of Mounting Supports, and Dissipation on a Piezoelectric Quartz Double-Ended Tuning Fork Gyroscope
G. Choi, Y. Yong
Rutgers University, New Brunswick, NJ, USA
A COMSOL model of a piezoelectric quartz double ended tuning fork gyroscope was implemented. The gyroscope has two detection modes; the first mode detects the angular velocity about a z-axis perpendicular to the tuning fork plane (x-y plane), while the second mode detects the angular velocity about a y-axis that is the longitudinal axis along the length of the tuning fork. Eigenfrequency analyses ...
J. Kundrata, A. Baric
Faculty of Electrical Engineering and Computing, University of Zagreb, Zagreb, Croatia
This paper presents the electrical and thermal analysis of an OLED module. The OLED module consists of the OLED tile and the DC-DC converter incorporated in its backplane. The DC-DC converter is realized as an integrated circuit and its inductor is embedded in the the backplane. The DC-DC converter is highly efficient, but a fraction of the electrical power is dissipated in the integrated circuit ...
A. A. Bhat, S. Agarwal , D. Sujish, B. Muralidharan, B. P. Reddy, G. Padmakumar, K. K. Rajan
Indira Gandhi Center for Atomic Research, Kalpakkam, Tamilnadu, India
Induction furnaces are employed for vacuum distillation process to recover heavy metals after electro-refining operation. Induction furnace of suitable heating rate and cooled by passive means are required to be developed for this purpose. It is planned to set up a mock up induction furnace which will simulate the conditions to be realized in actual vacuum distillation furnace for this purpose. ...
L. Sujatha, B. Preethi
Rajalakshmi Engineering College, Chennai, India
MEMS gyroscope technology provides cost- effective method for improving directional estimation and overall accuracy in the navigation systems. This paper presents a tuning- fork gyroscope (TFG)  with a perforated proof mass. The perforated proof mass used in the design enables the reduction of the damping effect. This MEMS based gyroscope was designed using COMSOL Multiphysics 4.2a. This ...
N. Elabbasi, J. Bergstrom, and S. Brown
Veryst Engineering, LLC.
Peristaltic pumping is an inherently nonlinear multiphysics problem where the deformation of the tube and the pumped fluid are strongly coupled. We used COMSOL Multiphysics to investigate the performance of a 180 degree rotary peristaltic pump with two metallic rollers, and an elastomeric tube pumping a viscous Newtonian fluid. The model captures the peristaltic flow, the flow fluctuations ...
R. C. Thiagarajan
ATOA Scientific Technologies Private Limited, Bangalore, India
Conductive Composites such as carbon fiber reinforced composites are increasingly used in safety critical aerospace applications. The catastrophic macro structural failure of composite structures initiates from a micro level failure event such as fiber breaks. The ability to detect damage early on can improve the safety level and reliability of composite structures. A multilevel self-sensing ...