自催化反应锋的对流指进
Convective Fingering of an Autocatalytic Reaction Front
摘要：
本文报道了碘酸-亚砷酸化学反应前沿的对流驱动指进不稳定性的实验观察。锋面以垂直板的形式向上传播;板的厚度是变化的，以控制不稳定的程度。我们观察到的发病和随后的非线性演变的手指，这是可见的{ \it p}H指示剂。我们测量的手指在其初始阶段的间距，并将其与黄{ \it et. al.} [{ \it Phys. Rev. E}，{ \bf 48}，4378（1993），未发表]。我们发现协议的理论预测的厚度依赖性。
英文摘要：
We report experimental observations of the convection-driven fingering instability of an iodate-arsenous acid chemical reaction front. The front propagated upward in a vertical slab; the thickness of the slab was varied to control the degree of instability. We observed the onset and subsequent nonlinear evolution of the fingers, which were made visible by a {\it p}H indicator. We measured the spacing of the fingers during their initial stages and compared this to the wavelength of the fastest growing linear mode predicted by the stability analysis of Huang {\it et. al.} [{\it Phys. Rev. E}, {\bf 48}, 4378 (1993), and unpublished]. We find agreement with the thickness dependence predicted by the theory.
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