A qualitative study to the in-plane permeability modelling of Non-Crimp\ud
Fabrics has been carried out. A network flow model was developed to describe flow through\ud
inter bundle channels (meso level). To improve this model, it was extended with details that\ud
consider stitch yarn influenced regions. The model predicts a highly anisotropic permeability.\ud
The predicted permeability in the machine direction of the fabric corresponds with the\ud
experimental results. However, prediction of permeability perpendicular to the fabric’s\ud
machine direction does not correspond with the experimental results. Possibly, flow through\ud
fibre filaments (micro level) is significant and the network flow model has to be extended to\ud
include this type of flow