A self-consistent approach for the acoustical modeling of vegetal wools

Abstract

Vegetal wools have the capacity to store atmospheric carbon dioxyde, one of the main gases responsible for climate change. So, these insulating materials are used as key elements for green buildings. Moreover, vegetal wools present high sound absorption level performances contributing to the acoustic comfort of indoor living spaces. These properties are directly related to the morphology and the * .

Effect of Polydispersity on the Transport and Sound Absorbing Properties of Three-Dimensional Random Fibrous Structures

“…For that purpose, numerous theoretical studies have been conducted during the last decades. In most cases, composite felts are modeled as aligned fiber bundles (Berdichevsky and Cai [4], Boutin [5], Thiery and Boutin [6], Piegay et al [7], Tarnow [8,9,10], Umnova et al [11], Semeniuk and Göransson [12], Semeniuk et al [13]). These approaches often assume that the representative elementary volume of a composite felt can be reduced to the most basic geometrical information, i.e., the porosity ϕ and the fiber size, so that it is based on a bicomposite cylindrical pattern made of an internal cylindrical fiber and an external fluid shell that ensures the fluid connectivity.…”

Micro-Macro Modelling Approach of Vegetal Wools Thermal Conductivity

“…Indeed, they are able to store large quantities of carbon dioxide in a short time (Pittau et al, 2019). Vegetal fibres in these bio-based fibrous insulating materials are characterized by a large variability of their morphologies, their shapes and their size distributions (Piégay et al 2018, Piégay et al 2021). These specificities of the vegetal wools microstructure have a strong influence on their thermal properties and more particularly on their thermal conductivity.…”