Dynamics of Spiral Wave Tip in Excitable Media with Gradient Parameter

作     者：DENG Bin-Wen ZHANG Guo-Yong CHEN Yong 

作者机构：Institute of Theoretical Physics Lanzhou University Lanzhou 730000 China 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2009年第52卷第7期

页      面：173-179页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080101[工学-一般力学与力学基础] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Supported by National Natural Science Foundation of China under Grant No.10305005 the Fundamental Research Fund for Physics and Mathematic of Lanzhou University 

主　　题：spiral wave spatial gradient Barkley model 

摘      要：Using a Barkley model as an example, we study spirM waves and spiral tips in a gradient excitable medium. The gradient distribution of parameters is introduced to depict the inhomogeneous medium. It is found that the parameter fluctuations play an important role in the morphology of spiral pattern and the movements of spiral tips. For varied gradient parameters, it is observed that there exist three kinds of spiral behaviors, stable rotation, rebound of spiral tip from the boundary, and spiral breakup.