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Article
Structural Size and Temperature Dependence of Solid to Air Heat Transfer
International Journal of Thermal Sciences
  • Tarekul Alam, Pennsylvania State University - Main Campus
  • A. P. Raghu, Pennsylvania State University - Main Campus
  • M. Amanul Haque, Pennsylvania State University - Main Campus
  • Christopher Muratore, University of Dayton
  • Andrey A. Voevodin, Air Force Research Laboratory
Document Type
Article
Publication Date
11-1-2013
Abstract
Accurate prediction of heat transfer from micro and nanoscale devices is very important for their operation and reliability. While the general consensus is that the heat transfer coefficient increases at the smaller scales, the literature also indicates contradiction in the scaling across length scales. In this paper, we present an experimental technique to accurately characterize heat transfer from micro to nano scales using infrared microscopy on nanofabricated specimens that are integrated with micro heaters. The heat transfer coefficient for quiescent air is found to be about two orders of magnitude higher than its bulk counterpart. It also showed pronounced inversely proportional relationship with temperature and suggested that solid to air conduction is the dominant mode of heat transfer. It was found that pressure only indirectly influences heat transfer. Based on the experimental data, we present an empirical relationship for the heat transfer coefficient that depends on the ratio of the surface area to cross-sectional area, temperature of the heated solid and its proximity to other solid bodies.
Inclusive pages
1–7
ISBN/ISSN
1290-0729
Comments

Permission documentation is on file.

Publisher
Elsevier
Peer Reviewed
Yes
Citation Information
Tarekul Alam, A. P. Raghu, M. Amanul Haque, Christopher Muratore, et al.. "Structural Size and Temperature Dependence of Solid to Air Heat Transfer" International Journal of Thermal Sciences Vol. 73 (2013)
Available at: http://works.bepress.com/christopher-muratore/75/