Study of a bimolecular annihilation process for coarsening reactants

We consider the spatio-temporal behavior of the A+B --> 0 bimolecular react ion in a system where both reactants tend to segregate into separated phase s. Our study is based on the numerical solution of a pair of reaction-diffu sion equations appropriate to capture the underlying coarsening dynamics. T he interplay between reaction and coarsening leads to a complex pattern of reactants spatial distribution. At short/intermediate times two distinctive dynamical regimes are seen in the decay of overall concentration and dropl et number and the behavior of droplet radii. (C) 1999 American Institute of Physics. [S0021-9606(99)50911-2].