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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-421-2

International Heat Transfer Conference 15
August, 10-15, 2014, Kyoto, Japan

Experimental Investigation on Mixed Convection in Horizontal Channels Heated Below and Partially Filled with Aluminium Foam

Get access (open in a dialog) DOI: 10.1615/IHTC15.mcv.009297
pages 4647-4658

Аннотация

An experimental investigation on mixed convection in a rectangular channel heated from below and partially filled with an aluminum foam is presented. The working fluid is air and the aluminum foam layer is sets on the heated wall of the channel. The channel upper plate has a heat transfer toward the external ambient. The effect of the aluminum foam on the mixed convection in the heated channel by wall temperature measurements and flow visualization are analyzed. Results are given for heated channel without and with foam in terms of wall temperature profiles for different Reynolds number value, wall heat flux and aluminum foam layers with different pores per inch. Temperature rise profiles along the lower heated wall for the channel with foam are compared with the ones for the channel without foam. Results allow to observe that foams with higher pore per inch show lower average wall temperature values whereas the local wall temperatures showed different behaviors for the different pore per inch values. The presence of foam in heated channel determined weaker secondary motions with respect to the clean cases. The effect of the foams seems more significant for the high Reynolds number values and average Nusselt number increases with the foam presence in the heated channel.