M.J. Jakubinek[1,2], C.A. Whitman[2,3], and M.A. White[1,2,3]
Department of Physics and Atmospheric Science, Dalhousie University, Halifax, Nova Scotia, Canada
Institute for Research in Materials, Dalhousie University, Halifax, Nova Scotia, Canada
Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, Canada
There is considerable interest in the possibility of combining NTE materials with normal (positive) thermal expansion materials, to reduce the potential of failure of a material or component due to thermal stress fracture. Finite element analysis (FEM) is used to explore the overall expansion and thermal stress in composites.
A Study on the Effects of the Nusselt Number and the Dimensional Parameters on Carbon Nanostructure-Based Pin Fin Heatsinks Grown-on-Package for Electronic Package Cooling by Natural Convection
P. Rezai1,2, M. S. Kabir1,2, and P. Enoksson1
1Department of Microtechnology and Nanoscience, Chalmers University of Technology, Gothenburg, Sweden
2SMOLTEK AB, Gothenburg, Sweden
In this paper, an experimental and theoretical study of natural convectional heat transfer from directly grown-on-package carbon nanostructure-based pin fin heatsinks is studied. The simulations are done by using the Heat Transfer Module in COMSOL Multiphysics. To verify the model, we chose a reference commercial Al-based heatsink manufactured by Thermaflo Inc.In all simulations, a rectangular ...
D. Sujish, S. Agarwal, B. Muralidharan, B.K. Sharma, V. Suresh Kumar, B. Prabhakara Reddy, G. Ravisankar, K. Nagarajan, C.A. Babu, and P. Kalyanasundaram
Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu, India
Non aqueous metal fuel reprocessing involves electrochemical deposition of spent metallic fuel on the cathode of an electrolytic cell. Apart from metal fuel, the cathode deposit would also contain occluded molten salts and liquid cathode. Subsequent purification and consolidation of these heavy metals is conducted in a vacuum retort. Here the cathode deposits are charged into graphite crucible ...
P. Goyal, V. Verma, R.K. Singh, and K.K. Vaze
Bhabha Atomic Research Centre, Mumbai, Maharashtra, India
High level radioactive waste (HLW) generated by nuclear fuel cycle is immobilized using glass melters. In Glass melters such as Joule Heated Ceramic Melter (JHCM) electrodes immersed in the glass generates heat by the joule heating due to electric current passing between electrodes through glass. For melter performance it is required to evlaute temperature distribution in the melter. Thermal ...
M. Fält, and R. Zevenhoven
Thermal and Flow Engineering Laboratory, Department of Chemical Engineering
Åbo Akademi University
Air-conditioning produced by traditional vapor compression cycle is an energy demanding operation. By using passive cooling methods is it possible to avoid, or at least reduce, the need for vapor compression cooling. A passive radiative cooling method could be a three windowed skylight, filled with a greenhouse gas. Earlier modeling of such a skylight has shown promising results, and work has ...
J.A. Ospina and E. Canuto
Politecnico di Torino, Torino, Italy
The research project under which the COMSOL simulations are performed deals with multilayer and fine thermal control of an optical reference cavity for space applications. The cavity, made of Ultra Low Expansion glass (Corning ULE), must be kept close to the zero expansion temperature of the glass (close to room temperature). The target can only be met by active control, while leaving the cavity ...
Deregnaucourt, F.,Boulenguez, J., Falières, J.M.1, Pietrzyk, S.2
1 Société CABAC Logistique, Captieux, France
2 Laboratoire de Catalyse de Lille/LGCA USTL-ENSCL-ECLille, Villeneuve d’Ascq, France
Self-reheating tins are composed of two parts; one of them contains a ready-to-eat preserved product, the other one, the components of an exothermic process which, once started, brings the edible product to the temperature at which it is usually eaten. Some existing data on the temperatures in the heating and heated parts during the process have been used to validate the results obtained by ...
T. Chen, and P.G. Ifju
University of Florida, Gainesville, Florida, USA
This paper describes using thermal structural interaction to model the shrinkage behavior in cement paste under drying. An inverse method of combining the finite element analysis and the least-squares method is implemented to fit experimentally determined shrinkage in order to obtain material propertiesfrom the complex geometry used in the tests. The finite element model is created in COMSOL ...
G. Cammarata, and G. Petrone
Department of Industrial and Mechanical Engineering, University of Catania, Catania, Italy
In this study fluid-dynamical and thermal performance of active chilled beams is investigated by 2D and 3D modelling in COMSOL Multiphysics. Three different typologies of those air conditioning systems are considered. Results, obtained for typical range of variation of operational conditions, are principally produced as temperature and velocity distributions. Special attention is paid to the ...
W. Vetterling, and Z. Peng
Zink Imaging, Inc., Bedford, Massachusetts, USA
This document describes a method for maintaining the long-term calibration of a full color direct thermal printer. An essential component of the system is a thermal model created using COMSOL Multiphysics that allows fitting of color data recorded at different temperatures and exposure times to model results for the same conditions. The fitted results reveal the depth and thickness of color dye ...