F. Roger, and A. Traidia
ENSTA Paristech, Paris, France
AREVA NP, Saint Marcel, France
The prediction of mechanical response of assemblies during arc welding necessitates the knowledge of thermal history of the components and the constitutive behavior of the materials. COMSOL can simulate thermal and structural interaction but it needs to evaluate the time evolution of internal variables like viscoplastic strain and hardening parameters. In the present paper we extend the ...
M. Hussain , Ramanathan S. , R. C. Thiagarajan ,
 ATOA Scientific Technologies, Bengaluru, Karnataka, India
Casting product performance depends on material, flow, Process Temperature, Solidification, Shrinkage and residual stress. In a casting process, not all available resources are utilized effectively which results in low quality of casting, defects and metal wastage. Physics based modeling is increasingly used to optimize product performance, improve quality and reduce defects of casting products. ...
R. Kiflemariam, M. Almas, C. Lin
Department of Mechanical & Materials Engineering, Florida International University, Miami, FL, USA
2D steady state heat conduction-electric current model was created in COMSOL Multiphysics® software to study the performance of thermoelectric generator-photovoltaic-thermal (TEG-PVT) system. Four different cases were studied in the paper. In case 1, PV cells without concentrator was simulated while in case 2, concentrator ratio range from 2 to 5 was utilized, In case 3, the convection heat ...
M. Darif, and N. Semmar
GREMI-UMR6606, CNRS-Universite d’Orleans, Orléans, France
A 2D transient heat conduction model was created in COMSOL Multiphysics to simulate temperature changes in material irradiated by a KrF laser beam confined on silicon’s surface. In this paper, the obtained results are shown and discussed in case of bulk Silicon. The heat source is distributed in time with ‘gate’ and ‘gaussian’ shapes. The thermal properties values ...
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 (ns*cm^2) ...
D. Groulx, and W. Ogoh
Dalhousie University, Halifax, NS, Canada
A 1D phase change problem, known as Stefan’s problem, for which analytical solutions are available, is solved as a 2D problem using COMSOL Multiphysics. The PCM medium is semi-infinite, initially solid at its melting temperature Tm, and at t = 0, the wall temperature is raised to Tw > Tm, prompting the PCM to start melting, from pure conduction, in a linear fashion starting at x = 0. The length ...
V. Dhinakaran, S. Khope, N. S. Shanmugam , K. Sankaranarayanasamy
National Institute of Technology, Tiruchirappalli, Tiruchirappalli, Tamil Nadu, India
Plasma Arc Welding (PAW) is one of the important arc welding processes commonly used in electronics, medical, automotive and aerospace industries due its high accuracy, finishing, and ability of welding any hard materials. It is an extension of Tungsten Inert Gas welding (TIG or GTAW). PAW has been unnoticed because it is more complex and requires more expensive equipment compared to other ...
R. Jia, J. Hu, X. Xiong
Department of Mechanical Engineering, University of Bridgeport, Bridgeport, CT, USA
Department of Electrical and Computer Engineering, University of Bridgeport, Bridgeport, CT, USA
Plate fin heat exchangers are widely used for heat recovery or cooling purposes in many industries, such as cryogenics, aerospace and automobile industries. This paper developed a numerical model to simulate the heat transfer and fluid flow in a counter flow plate fin heat exchanger and optimize its design parameters. The conjugate heat transfer in the finned plate and fluids in the channels ...
P. Aliabadi, S. Mahmoud, R. K. AL-Dadah
Mechanical Engineering Department, University of Birmingham, Birmingham, UK
This study is focused on using a thermoelectric device (TED) as an alternative to the cryogenic liquid for cooling cryosurgical probe used for cancerous tissue ablation. Thermoelectric device, namely Peltier, is a solid state device which converts electric current to thermal gradient. In past years thermoelectric devices have been successfully utilized in refrigeration and air conditioning ...
Numerical Study of a High Temperature Latent Heat Storage (200-300oC) Using Eutectic Nitrate Salt of Sodium Nitrate and Potassium Nitrate
C.W. Foong, J.E. Hustad, J. Løvseth, and O.J. Nydal
Department of Energy and Process Engineering, Norwegian University of Science and Technology, Trondheim, Norway
In this study, a small scale direct solar thermal energy storage system with secondary reflector is designed and developed. The main advantage of thermal energy storage is that cooking can be carried out during the time when there is little or no sun shine. In addition, no heat transport fluid is needed in this system. A well insulated heat storage should keep the heat for about 24 hours. KNO3 ...