Interaction of Chemical Waves and Hydrodynamic Flow
Spatial patterns generated by the coupling between chemical reaction and hydrodynamic flow have recently attracted increasing attention [1,2]. Examples are the stationary “mosaic” patterns and the deformation and irregular decomposition of chemical waves observed in an uncovered solution layer of the unstirred Belousov-Zhabotinskii (BZ) reaction [3–6]. Various attempts have been made to explain the origin of these structures by the effects of convective flow caused by evaporative cooling and/or the exothermicity of the reaction. In order to investigate the nonlinear interactions between hydrodynamics and chemical dynamics we carried out direct and quantitative measurements of hydrodynamic flow in an excitable BZ-solution layer using space-resolved microscope video imaging techniques.
KeywordsWave Front Oscillatory Flow Spiral Wave Hydrodynamic Flow Chemical Dynamic