  In this work we want to simulate with the Lattice-Boltzmann method in 2D the
capillary infiltration into porous structures obtained from the packing of
particles. The experimental problem motivating our work is the densification of
carbon preforms by reactive melt infiltration. The aim is to determine
optimization principles for the manufacturing of high-performance ceramics.
Simulations are performed for packings with varying structural properties. Our
analysis suggests that the observed slow infiltrations can be ascribed to
interface dynamics. Pinning represents the primary factor retarding fluid
penetration. The mechanism responsible for this phenomenon is analyzed in
detail. When surface growth is allowed, it is found that the phenomenon of
pinning becomes stronger. Systems trying to reproduce typical experimental
conditions are also investigated. It turns out that the standard for accurate
simulations is challenging. The primary obstacle to overcome for enhanced
accuracy seems to be the over-occurrence of pinning.
