Corrigendum to “On the examination of the Darcy permeability of fibrous porous media; New correlations” [Chem. Eng. Sci. 173 (2017) 525–536]

Effect of the fibre diameter polydispersity on the permeability of nonwoven filter media

“…The aim of this study is to cope with this problem starting from the existing data, that is, to determine a general expression of the dimensionless permeability and the right equivalent fibre diameter. As previously underlined by other authors, [ 6 ] deducing the permeability value from experimental measurements (Equation ()) is quite complicated due to the experimental uncertainties on the thickness and the fibre size distribution. One alternative to overcome this bias is to resort to numerical tools to build 3‐D fibrous media with specific characteristics (solid volume fraction, thickness, and fibre size distribution) that are perfectly known.…”

“…In fact, the more the fibres’ through‐plane angle deviates from zero, the more κ increases. More recently, Zhu et al [ 6 ] have proposed two new correlations via their work on the impact of compression on the permeability of seven fibrous media.…”

“…In fact, the more the fibres' through-plane angle deviates from zero, the more κ increases. More recently, Zhu et al [6] have proposed two new correlations via their work on the impact of compression on the permeability of seven fibrous media. These previous studies (numerical simulations or experimental works) have shown that i. the permeability increases as the fibre volume fraction decreases for a constant fibre diameter; ii.…”

“…For higher fibre volume fractions, that is, α > 0.8 (concentrated region), the permeability drops towards zero at a critical value of fibre volume fraction (α C ). [7] Different expressions of the permeability, depending on the direction of the flow relative to the orientation of the fibres, were identified in the literature in particular by Jackson and James, [8] Woudberg, [9] Thomas et al, [10] and Zhu et al [6] These expressions are based on different types of flows: parallel or crossed flows with respect to the fibres which can be randomly placed or arranged according to a periodic pattern. As this orientation is the closest to real nonwoven media for air filtration applications, only the flow perpendicular to the fibres will be discussed in this study.…”