MODIFIED DIFFUSION-LIMITED AGGREGATION SIMULATION OF ELECTRODEPOSITION IN 2 DIMENSIONS

A modified, diffusion-limited aggregation model that includes a unifor m drift simulates the process of electrodeposition. Through a systemat ic variation of the model's parameters, aggregates (electrodeposits) g rown under different simulation conditions (experimental conditions of the voltage, current density, and concentration) develop as open dend ritic or as compact messy forms. The resulting aggregate morphologies are characterized by geometric quantities derived from the aggregate p article position distribution.;Power laws relate the geometric quantit ies to each other. Ohm's law is obeyed to lowest order in the aggregat e surface curvature where the curvature is an effective conductivity. The distribution of open sites and its moments, which are geometric qu antities, are introduced.