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Heat Transfer and Flow Characteristics in an Annulus Filled with Aluminum Foam  

Noh Joo-Suk (Department of Indoor Environment System, Kyonggi Institute of Technology)
Han Young-Hee (School of Mechanical Engineering, Chungbuk National University)
Lee Kye-Bock (School of Mechanical Engineering, Chungbuk National University)
Lee Chung-Gu (School of Mechanical Engineering, Chungbuk National University)
Publication Information
Journal of Energy Engineering / v.15, no.1, 2006 , pp. 60-66 More about this Journal
Abstract
An experimental investigation on the flow and convective heat transfer characteristics has been carried out far aluminum foam heat sink inserted into the annulus to examine the feasibility as a heat sink. Two aluminum foams or different permeability were selected to provide the friction factor and heat transfer correlations as function of Darcy, Reynolds and Prandtl number. Experimental results show that the friction factor is higher than clear annulus without aluminum foam, while $6\sim10$ times augmentation in Nusselt number is obtained. This technique can be used for the compactness of the heat exchanger.
Keywords
Annulus; Nusselt number; Friction factor; Permeability; Aluminum foam; Heat flux; Pore density;
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