Dynamic viscous permeability of an open-cell aluminum foam: Computations versus experiments

Perrot, Camille; Chevillotte, Fabien; Panneton, Raymond

doi:10.1063/1.2829774

Cited by 75 publications

(35 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the case of a medium with arbitrary pore shape, it needs to be estimated numerically. 32 The value of α 0 increases with the increased value of the standard deviation in the pore size σ s , and doubles when σ s increases from 0 (uniform, identical pores, e.g., glass beads) to 0.6 (pronounced pore size distribution, e.g., recycled granulates of a highly irregular shape).…”

Section: (σS Ln 2)mentioning

confidence: 99%

See 1 more Smart Citation

A Review of Acoustical Methods for Porous Material Characterisation

Horoshenkov¹

2017

IJAV

View full text Add to dashboard Cite

The purpose of this paper is to present and discuss a range of in-situ and laboratory methods can be used to measure the morphological characteristics of porous materials. In the case of foams and granular media used for noise control applications, the most common of these characteristics are pore size and its distribution, porosity, and pore connectivity. In the case of fibrous media, the most useful non-acoustical characteristics are the fibre size and packing density. In the case of outdoor surfaces such as gravel, sandy soils, and agricultural land, which can be partly saturated with water, it is of direct interest to measure the degree of water saturation hydraulic permeability and pore size gradient. In the case of materials with good physiochemical properties, it is of interest to determine their internal pore surface area, porosity, and pore size scales. In this paper, the existing and newly emerging acoustic characterisation methods are discussed in terms of their complexity, accuracy, and sample requirements. The application of these methods relate to traditional needs to measure and predict the in-situ performance of noise control elements and outdoor surfaces, to ensure the quality control during material manufacturing process and to be able to measure non-invasively the micro-and nano-structure of porous media which is used in catalytic filters, electric capacitors and for gas storage. Parts of this paper were presented at the 22nd International Congress on Sound and Vibration in Florence.

show abstract

Section: (σS Ln 2)mentioning

confidence: 99%

“…In some more recent publications this parameter has been modified and assigned with notations other than β which was originally used by Pride et al (e.g., parameter P in Eq. (25) in ref., 32 parameter b in Eq. (5.32) in ref.…”

Section: Granular Materialsmentioning

confidence: 99%

A Review of Acoustical Methods for Porous Material Characterisation

Horoshenkov¹

2017

IJAV

View full text Add to dashboard Cite

show abstract

“…The dynamic interaction between a flowing fluid and the solid constituents of a porous medium is a key issue controlling wave propagation in geological [1][2][3] , biological 4,5 , and engineered systems 6,7 . The general theory of wave propagation in porous media was developed in references [8][9][10][11][12] .…”

Section: Introductionmentioning

confidence: 99%

Frequency-dependent viscous flow in channels with fractal rough surfaces

Cortis

Berryman

2010

Physics of Fluids

View full text Add to dashboard Cite

The viscous dynamic permeability of some fractal-like channels is studied. For our particular class of geometries, the ratio of the pore surface area-to-volume tends to ∞ (but has a finite cutoff), and the universal scaling of the dynamic permeability, k(ω), needs modification. We performed accurate numerical computations of k(ω) for channels characterized by deterministic fractal wall surfaces, for a broad range

show abstract

“…8,[11][12][13][14] The idealized periodic unit cell is then reconstructed, using x-ray tomography (l-san) and advanced computational fluid dynamics analysis is performed to derive properties relevant for the acoustic behavior. These methods allow a great understanding of the impact of microstructure on acoustic behavior.…”

Section: Introductionmentioning

confidence: 99%

Effect of the microstructure closed pore content on the acoustic behavior of polyurethane foams

Doutres¹,

Atalla²,

Dong³

2011

Journal of Applied Physics

129

134

View full text Add to dashboard Cite

The present paper proposes to investigate the links between the microstructure of polyurethane foams and their sound absorbing efficiency, and more specifically the effect of membranes closing the cells. This study is based on the complete characterization of 15 polyurethane foam with various cell sizes and reticulation rates (i.e., open pore content): (i) characterization of the microstructure properties (cell size C s , strut thickness t, reticulation rate R w …) from SEM pictures, (ii) characterization of nonacoustic parameters (porosity U, airflow resistivity r, tortuosity a 1 …) from direct and indirect methods. Existing analytical links between microstructure properties and nonacoustic parameters are first applied to fully reticulated materials. Then, they are improved empirically to account for the presence of the closed pore content. The proposed expressions associated to the Johnson-Champoux-Allard porous model allow a good estimation of the sound absorbing behavior of all polyurethane foams, fully reticulated or not. This paper also demonstrates the important effect of the presence of cell membranes: increase of the airflow resistivity, tortuosity, and the ratio between the thermal and viscous characteristic lengths while decreasing these two characteristic lengths. Thus, the sound absorption efficiency at low frequencies is improved but can be worsened in some higher frequency bands.

show abstract

Dynamic viscous permeability of an open-cell aluminum foam: Computations versus experiments

Cited by 75 publications

References 34 publications

A Review of Acoustical Methods for Porous Material Characterisation

A Review of Acoustical Methods for Porous Material Characterisation

Frequency-dependent viscous flow in channels with fractal rough surfaces

Effect of the microstructure closed pore content on the acoustic behavior of polyurethane foams

Contact Info

Product

Resources

About