APPLICATION OF PERMEABILITY NETWORK MODEL TO NON-CRIMP FABRICS*

SUMMARY: We will here combine previous studies to yield a model that can predict the true permeability of NCFs. The model includes the geometrical features from the stitching process as well as statistical variations. A correlated randomisation is performed by the use of Monte Carlo simulations in order to mimic the global geometry of the fabric. The permeability for the unit cells, which describes the local geometry of the fabric, are thereafter determined by CFD-simulations. The permeability model for a biaxial fabric including the features from the stitching process proves that the correlation distance together with the amount of irregularity have only slight influences on the global permeability, while the presence of crossings and the average channel width are extremely important for the total permeability