Experimental Investigation of Free Convection from Foam Heat Sinks in an Inclined Rectangular Channel
Abstract
In
this present study, free convection from an in-line 5x1 array of aluminum foam
heat sinks which were placed on the bottom wall of the inclined rectangular
channel was investigated. Aluminum foam heat sinks were made of Al-6101 alloy.
All heat sinks mounted on a bottom wall of the channel was discrete form and
exposed to uniform heat flux. Aluminum foam materials with three different pore
densities (10, 20 and 40 PPI) were used in experiments. Air was used as coolant
fluid (Pr =0.7). The experiments were made for Rayleigh Number range from 2.03
x107 to 1.33 x108 and the channel inclination angles were
varied from 0° to 90°. Moreover, the heat transfer results from
the aluminum foam heat sinks were also compared to the results obtained for
foam-free (without foam) surfaces. The results showed that both the channel
inclination angle and the usage of foam heat sinks are significant influences
on heat transfer results.
Keywords
foam heat sinks,electronic cooling,Free convection,inclined channel
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