Complex motion of precipitation bands

Abstract

Formation and dynamics of an Al(OH)_3 precipitation ring is studied by diffusing NaOH into a gel containing AlCl_3. Limited feeding of the outer electrolyte (NaOH) is found to yield an intricate ring-dynamics which involves stopping and reversal of the direction of motion of the precipitation ring, and evolution into stationary multi-ring structures. A model of the ring-dynamics is developed by combining a phase separation scenario for the precipitation with the redissolution (complex formation) of the precipitate in the excess of the outer electrolyte.

6 pages, 15 figures

References in corpus (4)

• Formation of Liesegang patterns: A spinodal decomposition scenario
• Formation of Liesegang Patterns
• Liesegang patterns : Studies on the width law
• Formation of Liesegang patterns: Simulations using a kinetic Ising model

Cited by in corpus (4)

• Simulation of reaction-diffusion processes in three dimensions using CUDA
• Coarsening of Precipitation Patterns in a Moving Reaction-Diffusion Front
• Diffusion-controlled formation and collapse of a d-dimensional A-particle island in the B-particle sea
• Diffusion-controlled coalescence, fragmentation and collapse of $d$-dimensional $A$-particle islands in the $B$-particle sea