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Influence of Thermal Contact Resistance of Aluminum Foams in Forced Convection: Experimental Analysis

Department of Engineering, University of Rome ‘Niccolò Cusano’, Via Don Carlo Gnocchi 3, 00166 Roma, Italy
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Materials 2017, 10(8), 907; https://doi.org/10.3390/ma10080907
Received: 1 July 2017 / Revised: 31 July 2017 / Accepted: 3 August 2017 / Published: 5 August 2017
(This article belongs to the Section Porous Materials)
In this paper, the heat transfer performances of aluminum metal foams, placed on horizontal plane surface, was evaluated in forced convection conditions. Three different types of contacts between the sample and the heated base plate have been investigated: simple contact, brazed contact and grease paste contact. First, in order to perform the study, an ad hoc experimental set-up was built. Second, the value of thermal contact resistance was estimated. The results show that both the use of a conductive paste and the brazing contact, realized by means of a copper electro-deposition, allows a great reduction of the global thermal resistance, increasing de facto the global heat transfer coefficient of almost 80%, compared to the simple contact case. Finally, it was shown that, while the contribution of thermal resistance is negligible for the cases of brazed and grease paste contact, it is significantly high for the case of simple contact. View Full-Text
Keywords: open cell metal foams; heat transfer enhancement; contact resistance; forced convection open cell metal foams; heat transfer enhancement; contact resistance; forced convection
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MDPI and ACS Style

Guarino, S.; Di Ilio, G.; Venettacci, S. Influence of Thermal Contact Resistance of Aluminum Foams in Forced Convection: Experimental Analysis. Materials 2017, 10, 907.

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