FLOW WAVES INDUCED BY CHEMICAL WAVE TRAINS TRAINS AND DYNAMIC BEHAVIOR OF SURFACE DEFORMATION WAVES

化学波列诱发的流动波与表面变形波的动力行为

基本信息

批准号：
11837013
负责人：
HIDETOSHI Miike
金额：
$ 2.18万
依托单位：
Yamaguchi University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11837013/
关键词：
BZ (Belousov-Zhabotinskv) Reaction Chemical Reaction Waves Reaction-Diffusion System Spiral Waves Flow Waves Oscillatory Flow Marangoni Convection Surface Deformation 振動対流流体現象表面変形

项目摘要

Belousov-Zhabotinsky (BZ) reaction is known as a typical example of the system under non-equilibrium and open conditions. Self-organizations such as spiral structures and target patterns observed in the system have been understood by modeling the pattern dynamics with reaction-diffusion mechanism. We have found convection flows induced in the solution layer exciting chemical waves. They are oscillatory flow associated with the spiral waves and developed convection associated with the accelerating chemical waves (bim waves). In this study, we carried out both experimental and theoretical approaches to understand the curious phenomena such as flow waves appeared in the chemical wave trains. It was pointed out that not only the Marangoni instability associated with the respective chemical wave trains but also a global distribution of reactants and/or catalysts are effective to bring the surface tension driven convection. New findings are1) Outgoing flow waves are observed in a reactor having a large diameter (more than 15 cm) under the excitation of chemical spiral waves,2) The flow waves change their pattern shape from target to spiral. The spiral flow waves (having wavelength 60mm, rotation period 40s, and propagation velocity 1500μm/s) are rotating in the underlying pattern of chemical spiral waves (having wavelenth 1.0mm, rotation period 20s, and propagation velocity 100μm/s).3) Taking the distribution gradients of catalysts and reactants into account numerical experiments are carried out. We observed two curious dynamics of periodic instability in the chemical waves and periodic change in the convection structure.The above results have been reported at an international conference on "Dynamic Aspects of Complex Systems from Cell to Brain (2000.11 : Sendai, Japan)". Especially, a mechanistic explanation of the new findings will be presented in the international conference on Marangoni convection to be held in Germany (Giessen : 2001.9).

Belousov-Zhabotinsky（BZ）反应在非平衡和开放条件下被称为该系统的典型例子。通过用反应扩散机制对模式动力学建模，可以理解系统中观察到的自我组织，例如精神结构和目标模式。我们发现在解决方案层中引起的对话流令人兴奋的化学波。它们是与精神波相关的振荡流，并与加速化学波（BIM波）相关的转化。在这项研究中，我们进行了实验和理论方法，以理解化学波序列中出现的奇怪现象，例如流浪波。有人指出，不仅与相对化学波列相关的Marangoni不稳定性，而且反应物和/或催化剂的全球分布也有效地带来了表面张力驱动的连接。新发现为1）在化学螺旋波的兴奋下，在具有较大直径（超过15厘米）的反应器中观察到外向流，2）流波将其模式形状从目标变为精神。螺旋流动波（具有波浪长度为60mm，旋转周期40s和繁殖速度1500μm/s）在化学螺旋波的基础模式下旋转（具有WaveLenth 1.0mm 1.0mm，旋转周期20s，并且传播速度100μm/s）.3）。我们观察到化学波中周期性不稳定和施工结构的周期性变化的两种奇怪动态。在国际上，关于“从细胞到大脑的复杂系统的动态方面（2000.11：日本仙境）的国际动态方面）进行了报道。特别是，将在德国举行的国际马龙诺建设会议上提出对新发现的机械解释（Giessen：2001年9月）。