低浓度三分子模型差速流动引起的化学不稳定性  

Chemical instability induced by differential flow in low-concentration Brusselator

作　　者：王宝英[1] 龚玉兵[2] 

机构地区：[1]烟台师范学院图书馆,山东烟台264025 [2]烟台师范学院物理系,山东烟台264025

出　　处：《烟台师范学院学报（自然科学版）》2003年第1期17-20,24,共5页Yantai Teachers University journal(Natural Science Edition)

摘　　要：建立了低浓度三分子反应模型反应-流动-扩散方程,从理论上分析了出现差速流动化学不稳定的条件,得到了临界流动速率φc和扰动波包的群速度vg,讨论了扰动增长率与流速φ的关系,初步讨论了出现不稳定时的系统空间结构.研究表明,化学反应在低浓度条件下也可能出现差速流动引起的化学不稳定.The reactionflowdiffusion equation for lowconcentration Brusselator is developed,and the existence condition for differential flowinduced chemical instability in the model is theoretically analyzed.The neutral value φc of flow rate of reactant φ and the group velocity vg of perturbation wave packet are derived;The relations between flow rate φ and the perturbation growth rate Reλ are discussed,and the spatial structure of the system while instability exhibits is initially studied.The results show that the differential flowinduced chemical instability may exhibit under the condition of low concentration for chemical reaction.

关 键 词：低浓度三分子反应模型 反应-流动-扩散方程 差速流动 化学不稳定性 扰动增长率 流速 

分 类 号：O643.12[理学—物理化学]