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Gael Zaragoza and Russell Goodall Metal Foams with Graded Pore Size for Heat Transfer Applications Advanced Engineering Materials 15

Article first published online: 22 AUG 2012 | DOI: 10.1002/adem.201200166

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Open cell metal foams show great potential as a heat exchangers, due to their permeability to fluids and the high conductivity of the metallic network. In this study, aluminum foams were produced using the replication technique with NaCl, flour, and water used to create the preform. The samples included both uniform pore sizes and examples where different pore sizes were created in different parts of the sample. A bespoke rig was used to measure the thermal and fluid flow performance of the foams, and results for heat transfer coefficient are presented. It is also found that asymmetric behavior can be obtained when non-uniform pore sizes are present; a factor that could be exploited in heat exchanger design.

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