DIFFUSION TO FRACTAL SURFACES .6. KINETICS IN HYDRODYNAMICAL SYSTEMS

Kinetic expressions for various laminar and turbulent hydrodynamical s ystems are generalized for describing planar, partially active interfa ces where the electroactive subset of the electrode can be approximate d as a fractal. The fractal wall-jet system is shown to be equivalent to the rotating disk problem. The case of turbulent flow towards a pla ne and laminar flow in a tube are also considered, and the theoretical results are verified by computer simulation. Finally, it is shown tha t if a conventional system exhibits power-law behaviour as a function of a diffusion-related kinetic parameter with some exponent xi then, i n the fractal case, the exponent will be replaced by xi(Df(f)-1).