From microstructure to acoustic behaviour of porous materials

Authors

  • C. Perrot GAUS, Mechanical Engineering Department, Université de Sherbrooke, Sherbrooke, Que. J1K 2R1, Canada
  • R. Panneton GAUS, Mechanical Engineering Department, Université de Sherbrooke, Sherbrooke, Que. J1K 2R1, Canada
  • X. Olny LASH, DGCB URA CNRS 1652, Ecl. Natl. Travaux Pub. de l'Etal, 69518 Cedex, France

Keywords:

Acoustic waves, Algorithms, Computational methods, Computerized tomography, Foams, Microstructure, Porosity, Porous materials, Thermodynamic properties, Viscosity, Acoustic energy, Helmoltz equations, Kelvin structure, Sound absorption

Abstract

A method to determine the macroscopic parameters of absorbent materials from the knowledge of their cellular microstructure, either identified by computer microtomography or scaled by macro-micro geometrical model is discussed. All the relevant quantities have been computed on cellular systems. Study of the fluid velocity field for a hexagonal porous system reveal significant quantitative agreement between macroscopic parameters derived and measured from real aluminum foam. The results reveal the deep relationship between Kelvin structure and real reticulated foams.

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Published

2004-09-01

How to Cite

1.
Perrot C, Panneton R, Olny X. From microstructure to acoustic behaviour of porous materials. Canadian Acoustics [Internet]. 2004 Sep. 1 [cited 2021 Oct. 28];32(3):18-9. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1606

Issue

Section

Proceedings of the Acoustics Week in Canada