Working Paper Article Version 1 This version is not peer-reviewed

Flow and Convection in Metal Foams: A Survey and New CFD Results

Version 1 : Received: 14 August 2020 / Approved: 15 August 2020 / Online: 15 August 2020 (10:04:38 CEST)

A peer-reviewed article of this Preprint also exists.

Pulvirenti, B.; Celli, M.; Barletta, A. Flow and Convection in Metal Foams: A Survey and New CFD Results. Fluids 2020, 5, 155. Pulvirenti, B.; Celli, M.; Barletta, A. Flow and Convection in Metal Foams: A Survey and New CFD Results. Fluids 2020, 5, 155.

Journal reference: Fluids 2020, 5, 155
DOI: 10.3390/fluids5030155

Abstract

Metal foams are widely studied as possible tools for the enhancement of heat transfer from hot bodies. The basic idea is that a metal foam tends to increase significantly the heat exchange area between the hot solid body and the external cooling fluid. For this reason, this class of porous materials are considered as good candidates for an alternative to finned surfaces, with different pros and cons. Among the pros, we mention the generally wider area of contact between solid and fluid. Among the cons is the difficulty of producing different specimens with the same inner structure, with the consequence that their performance may be significantly variable. This paper will offer a survey of the literature with a focus on the main heat transfer characteristics of the metal foams. Then, a numerical simulation of the heat transfer at the pore scale level for an artificial foam with a spatially periodic structure will be discussed. Finally, these numerical results will be employed to assess the macroscopic modelling of the flow and heat transfer in a metal foam.

Subject Areas

Metal Foam; Porous Medium; Convection; Local Thermal Non-Equilibrium

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