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Flow Laws in Metal Foams: Compressibility and Pore Size Effects

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Abstract

The aim of our experimental work was to establish a simple relation between the flow parameters and the morphological parameters of metallic foam. We used foam samples made from different metals or alloys (Cu, Ni, Ni-Cr, etc) and of various thicknesses. Pore size ranged between 500 and 5000 μm. We measured the pressure profiles in foam samples using a specific experimental set-up of 12 pressure sensors distributed 1 cm apart along the main flow axis. The experimental loop made it possible to use indifferently water or air as working fluid. For the study of the gas (air) flow, velocities ranged roughly from 0 up to 20 m/s and for the liquid (water) flow, velocities ranged between 0 and 0.1 m/s. The measurements of the pressure gradients were performed systematically. We validated the Forchheimer flow model. The influence of the compressibility effects on permeability and inertia coefficient was emphasized. We demonstrated that the pore size Dp in itself is sufficient to describe flow laws in such high porosity material: K and β are respectively proportional to Dp2 and Dp−1.

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Authors and Affiliations

  1. Dpt ME, Polytech’ Marseille – Iusti Lab, 5, rue E. Fermi, technopole de Chateau Gombert, Marseille, 13453, France

    Jean-Philippe Bonnet, Frederic Topin & Lounes Tadrist

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  1. Jean-Philippe Bonnet
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  2. Frederic Topin
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  3. Lounes Tadrist
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Correspondence to Frederic Topin.

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Bonnet, JP., Topin, F. & Tadrist, L. Flow Laws in Metal Foams: Compressibility and Pore Size Effects. Transp Porous Med 73, 233–254 (2008). https://doi.org/10.1007/s11242-007-9169-5

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