From microstructure to acoustic behaviour of porous materials

Auteurs-es

  • 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

Mots-clés :

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

Résumé

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.

Fichiers supplémentaires

Publié-e

2004-09-01

Comment citer

1.
Perrot C, Panneton R, Olny X. From microstructure to acoustic behaviour of porous materials. Canadian Acoustics [Internet]. 1 sept. 2004 [cité 29 avr. 2026];32(3):18-9. Disponible à: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1606

Numéro

Vol. 32 No. 3 (2004)

Rubrique

Actes du congrès de la Semaine canadienne d'acoustique

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