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The previous paper (No. 2, Vol. 12-2011) [1] were analyzed the weave and construction parameters of high   density woven fabric and their influence on the pore morphology, which directly effects the functional properties   such as permeability and retention. The analysis encompassed physical and optical methods of testing. In this   paper, newly developed methods, tools and programs will be presented for virtual imaging of the multi-filament   woven fabric geometry with pore structure used to determine permeability and retention properties. Two methods   are applied for the generation of virtual fabric. One method involves developing software that is able to model   woven fabric in new condition from a series of realistic input parameters. In this step, deterministic and stochastic   methods are combined to create the fabric’s geometry. The other method involves reconstruction/generation the   3D woven geometry from sequences of 2D cross section images. The results prove that the 3D pore morphology   of high density multi-filament fabric can be illustrated in correlation of the woven construction parameters. The   developed methods for modeling and the CFD simulation of woven fabric build an important basis for determining   the mechanical flow properties such as permeability and retention characteristics of filters and barrier textiles.   Additionally, the effects of mechanical loads on the fabric morphology and on the permeability values will be   analyzed by applying uniaxial and biaxial tensile loads to the fabric. The tests provide the basis for a realistic   prediction to the effects of the machine and construction parameters on the fabric properties and the resulting   permeability and retention. These predictions can aid in analyzing the suitability of a fabric for a specific   application.

MODELING AND CFD-SIMULATION OF WOVEN TEXTILES TO DETERMINE PERMEABILITY AND RETENTION PROPERTIES