Flow modeling of linear and nonlinear fluids in two scale fibrous fabrics - Archive ouverte HAL
Article Dans Une Revue International Journal of Material Forming Année : 2015

Flow modeling of linear and nonlinear fluids in two scale fibrous fabrics

Résumé

The fundamental macroscopic material property needed to quantify the flow in a fibrous medium viewed as a porous medium is the permeability. Composite processing models require the permeability as input data to predict flow patterns and pressure fields. As permeability reflects both the magnitude and anisotropy of the fluid/fiber resistance, efficient numerical techniques are needed to solve linear and nonlinear homogenization problems online during the flow simulation. In a previous work the expressions of macroscopic permeability were derived in a double-scale porosity medium for both Newtonian and rheo-thinning resins. In the linear case only a microscopic calculation on a representative volume is required, implying as many microscopic calculations as representative microscopic volumes exist in the whole fibrous structure. In the non-linear case, and even when the porous microstructure can be described by a unique representative volume, microscopic calculation must be carried out many times because the microscale resin viscosity depends on the macroscopic velocity, which in turn depends on the permeability that results from a microscopic calculation. Thus, a nonlinear multi-scale problem results. In this paper an original and efficient offline-online procedure is proposed for the efficient solution of nonlinear flow problems in porous media.

Domaines

Matériaux
Fichier non déposé

Dates et versions

hal-04325829 , version 1 (06-12-2023)

Identifiants

Citer

Elena Lopez, Adrien Leygue, Emmanuelle Abisset-Chavanne, Sébastien Comas-Cardona, Christophe Aufrere, et al.. Flow modeling of linear and nonlinear fluids in two scale fibrous fabrics. International Journal of Material Forming, 2015, 10 (3), pp.317-328. ⟨10.1007/s12289-015-1280-5⟩. ⟨hal-04325829⟩
20 Consultations
0 Téléchargements

Altmetric

Partager

More