物理化学学报 >> 2000, Vol. 16 >> Issue (04): 338-344.doi: 10.3866/PKU.WHXB20000409

研究论文 上一篇    下一篇

调制BZ-CSTR反应体系小振荡诱导非平衡相变

魏庆莉, 侯哲, 李艳妮, 陈兰, 蔡遵生, 赵学庄   

  1. 南开大学化学系，天津 300071
  • 收稿日期:1999-07-05 修回日期:1999-11-22 发布日期:2000-04-15
  • 通讯作者: 赵学庄

Modulation Induced Nonlinear Phase Transitions of Small Amplitude Oscillation in CSTR-BZ Reaction

Wei Qing-Li, Hou Zhe, Li Yan-Ni, Chen Lan, Cai Zun-Sheng, Zhao Xue-Zhuang   

  1. Department of Chemistry,Nankai University,Tianjin 300071
  • Received:1999-07-05 Revised:1999-11-22 Published:2000-04-15
  • Contact: Zhao Xue-Zhuang

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摘要：

以流量为扰动参数,对连续搅拌釜式反应器(CSTR)中的Belousov-Zhabotinsky(BZ)反应体系小振荡进行周期或噪声扰动,改变扰动周期或扰动强度,在某些条件下可以诱导非平衡相变. 以BZ反应的四变量Montanator模型为基础,对相应流率区进行周期或噪声扰动,计算结果与实验基本定性一致.

关键词: CSTR-BZ, 小振荡, 周期扰动, 外噪声, 非平衡相变

Abstract:

Nonlinear phase transitions are observed both from experiment and simulations in the modulated CSTR-BZ reaction system. The small amplitude oscillation of potential at low flow region is perturbed by periodic or noise (random) signal on the flow. Phase transition may occur under certain conditions (perturbation frequency and perturbation amplitude).The 4-variables Montanator model is used in the modeling calculations, and our experiments are in qualitative agreement with the model calculations.

Key words: CSTR-BZ, Small oscillation, Periodicperturbation, Extemal noise, Nonlinear phase transition