脉动周期流中的自催化反应前沿
Autocatalytic reaction front in a pulsative periodic flow
摘要：
反应和未反应的物种之间的自催化反应前沿可以作为孤立波传播，即以恒定的前沿速度和具有固定的浓度分布，这是由分子扩散和化学反应之间的平衡引起的。支持介质中的速度场可能会通过不同的现象影响这种锋面的传播：对流，扩散增强，锋面形状变化......我们在这里报告的实验研究和晶格BGK数值模拟的振荡流的影响，碘酸和亚砷酸之间的自催化反应在Hele-Shaw细胞。在实验所涵盖的低频范围内，前行为由穿过间隙的流动控制，并且可以用2D数值模拟再现。在弱流速条件下，也推导出了解析解，并与我们的数据相吻合。
英文摘要：
Autocatalytic reaction fronts between reacted and unreacted species may propagate as solitary waves, namely at a constant front velocity and with a stationary concentration profile, resulting from a balance between molecular diffusion and chemical reaction. A velocity field in the supporting medium may affect the propagation of such fronts through different phenomena: convection, diffusion enhancement, front shape changes... We report here on an experimental study and lattice BGK numerical simulations of the effect of an oscillating flow on the autocatalytic reaction between iodate and arsenous acid in a Hele-Shaw cell. In the low frequency range covered by the experiments, the front behavior is controlled by the flow across the gap and can be reproduced with 2D numerical simulations. An analytical solution is also derived under the condition of a weak flow velocity, and is found to be in reasonable agreement with our data.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
