Abstract: Numerical solutions of kinetic equations delineating difusant’s spherical diffusion and spherical diffusion with a first-order reaction from surface of a particle in the space,by finite difference method,were given in this paper.With the same parameters and nearly the same boundary conditions,the numerical solutions were compared with the analytical solutions,and good agreement was shown.This effort provides the basis for investigating the formation of dye cloud in color imaging process.

Key words: chemical kinetics, numerical simulation, color imaging process