PERCOLATION WITH 2 INVADERS AND 2 DEFENDERS - VOLATILE CLUSTERS, OSCILLATIONS, AND SCALING

propose a novel model of two-phase flow in porous media in which both fluids act as the invaders as well as the defenders. Monte Carlo simul ations show that the structure of the fluids' clusters is volatile and changes with the time t and length scale. Moreover, n(s), the number of clusters of size s, and (s), the mean cluster size, both oscillate with t, indicating the constant breakup and recoalescence of the clust ers. New dynamical scaling laws for the cluster size distribution are also obtained.