Self-Organized Traveling Chemo-Hydrodynamic Fingers Triggered by a Chemical Oscillator

Pulsatile chemo-hydrodynamic patterns
due to a coupling between
an oscillating chemical reaction and buoyancy-driven hydrodynamic
flows can develop when two solutions of separate reactants of the
Belousov–Zhabotinsky reaction are put in contact in the gravity
field and conditions for chemical oscillations are met in the contact
zone. In regular oscillatory conditions, localized periodic changes
in the concentration of intermediate species induce pulsatile density
gradients, which, in turn, generate traveling convective fingers breaking
the transverse symmetry. These patterns are the self-organized result
of a genuine coupling between chemical and hydrodynamic modes.

由于振荡性化学反应与浮力驱动的流体动力流的耦合作用，当将贝卢索夫-扎博廷斯基反应的两种不同反应物溶液置于重力场中并满足接触区的化学振荡条件时，可以形成脉冲式化学-流体动力学模式。在常规振荡条件下，中间物种浓度的局部周期性变化诱导产生脉冲式的密度梯度，进而生成穿越横向对称性的移动对流指。这些模式是化学与流体动力学模式之间真实耦合的自组织结果。