TRANSPORT AND DIFFUSION IN 3-DIMENSIONAL COMPOSITE MEDIA

We will review recent progress in our understanding of classical trans port in porous media. Theoretical concepts will be illustrated with tw o distinct kinds of calculations. The first involve the grain consolid ation model and are based on a particular multisize packing of spheric al grains. The computational methods developed here are sufficiently a ccurate that we propose to combine them with direct measurements of th e pore and grain geometry based on X-ray microtomography. Our prelimin ary results indicate that this approach may well play an important par t in future studies of transport in porous media.