Microscopic numerical simulation of transverse permeability of fiber bundles in liquid composite molding

This paper treated the fiber bundles as porous media and researched the transverse permeability by the microscopic simulation based on Darcy law. Firstly,it builds the regular and random distribution microscopic numerical analysis models for the cross section of fiber bundles and calculates the transverse permeability of the fiber bundles under a constants pressure gradient; Secondly,it investigates the influence of the model size on the permeability values under a constant porosity,analyzes the size effect of computation model and determines the minimal size of the microscopic numerical analysis model to predict the transverse permeability; Finally,it calculates and analyzes the transverse permeability of the fiber bundles within fiber randomly distributed at different porosities,and obtains the influence rule of the porosity to the permeability values,which is compared with the results of the Gebart model and the Cell model.