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Determination of structural parameters of metallic foams from permeametry measurements

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Abstract

An experimental technique, permeametry, is carried out in order to determine the dynamic specific surface area and the tortuosity of three nickel foams. A capillary-type model allows calculation of these structural parameters from pressure-drop measurements. Studying pressure drops of two different flow configurations also allows quantification of a third parameter due to the anisotropy of the material structure. The values of the parameters determined throughout this work are compared with those obtained in previous works using different experimental methods.

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Abbreviations

A :

experimental coefficient defined by Equation 3 (Pa sm−2)

A vd :

dynamic specific surface area, related to volume of solid (m−1)

A ve :

specific surface area, related to volume of porous medium (m−1)

B :

experimental coefficient defined by Equation 4 (Pas2m−3)

Cr :

precision criterion

D :

hydraulic diameter of the cell (m)

d :

equivalent pore diameter (m)

f :

friction factor

H :

bed height or thickness of porous material (m)

J :

coefficient defined by Equation 8 (m−1)

K :

coefficient defined by Equation 9 (m−2)

l :

pore length (m)

mre :

mean relative error

n+1:

number of pressure taps

ΔP :

pressure drop (Pa)

R :

anisotropy factor or shape anisotropy ratio

Re:

superficial Reynolds number, Re = ρ U o d/u

Rei :

interstitial Reynolds number, Re i = ρ U o d/(εμ)

T :

tortuosity

U o :

superficial velocity (m s−1)

ε:

porosity

μ:

dynamic viscosity (Pa s)

ρ:

fluid density (kg m−3)

References

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Authors and Affiliations

  1. Laboratoire de Génie des Procédés, Institut Universitaire de Technologie, BP 420, 44606, Saint-Nazaire Cédex, France

    A. Montillet, J. Comiti & J. Legrand

Authors
  1. A. Montillet
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  2. J. Comiti
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  3. J. Legrand
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Montillet, A., Comiti, J. & Legrand, J. Determination of structural parameters of metallic foams from permeametry measurements. J Mater Sci 27, 4460–4464 (1992). https://doi.org/10.1007/BF00541579

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  • DOI: https://doi.org/10.1007/BF00541579

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