The modeling of fluid flows in porous media using cellular automata is discussed. Efficient methods for simulating these models on scalar, vector, and parallel computers are presented. Results for two-dimensional systems with up to 200 million particles show finite size effects. which may be...

The sintering of non-cohesive particles is examined via granular dynamics techniques. In particular, the relevance of percolation theory to the sintering process is examined and it is shown that directed percolation may provide an adequate description at the sintering threshold for nearly...

Wonderland, a compact, integrated economic, demographic and environmental model, is investigated using methods developed for studying critical phenomena. Simulation results show the parameter space separates into two phases, one of which contains the property of long term, sustainable...