学术报告
Propagation of Local Disturbances in Reaction Diffusion Systems Modelling Quadratic Auto-Catalysis
题目：Propagation of Local Disturbances in Reaction Diffusion Systems Modelling Quadratic Auto-Catalysis
报告人: Prof. Yuanwei Qi (齐远伟) （Central Florida University，USA）
摘要: In this talk, I show the recent work to study the propagation of initial disturbance in quadratic Auto-Catalytic chemical reaction in one-dimensional slab geometry, where two chemical species $A$, called reactant, and $B$, called auto-catalyst, are involved in the simple scheme $A + B /rightarrow 2B$. Experiments demonstrate that chemical systems, for which quadratic or cubic autocatalysis forms a key step, can support propagating chemical wavefronts. When the auto-catalyst is introduced locally into an expanse of the reactant which is initially at uniform concentration, the developing reaction is often observed to generate two wavefronts, which propagate outward from the initial reaction zone. We show rigorously that with such an initial setting the spatial region is divided into three regions by the two wavefronts. In the middle expanding region, the reactant isalmost consumed so $A/approx0$, whereas in the other two regions there is basically no reaction so $B/approx 0$. Most of the chemical reaction takes place near the wavefronts. The detailed characterization of concentrations is given for each of the three zones. Joint work with Xinfu Chen.
时间：2016年5月30日（周一）10:40-11:40
地点：首都师大北二区教学楼133教室
欢迎全体师生积极参加！
