arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0912.4247nlin.PS
收藏

螺旋波的漂移和弯曲

Drift and Meander of Spiral Waves

Andrew J. Foulkes

摘要:

在这篇论文中,我们关注的是反应扩散方程组的螺旋波解的动力学,以及它们在对称破缺扰动下的行为。我们提出了一个渐近理论的研究曲折(准周期螺旋波解决方案)螺旋波漂移由于对称性破缺扰动。这个理论是基于较早的理论:1995年Biktashev等人的漂移理论的刚性旋转螺旋,和1996年Biktashev等人的理论弯曲的螺旋在未扰动系统。我们结合这两种理论,首先重写1995年漂移理论使用的对称商系统方法的1996年曲折理论,然后继续延伸的方法,曲折螺旋考虑Floquet理论和使用奇异摄动法。我们证明了新开发的理论的工作简单的例子。我们还开发了一个数值实现的商系统的方法,证明其数值收敛性和它的使用在计算中,这将是很难做到的标准方法,并将这项研究的螺旋波的响应函数的计算问题。

英文摘要:

In this thesis, we are concerned with the dynamics of spiral wave solutions to Reaction-Diffsion systems of equations, and how they behave when subject to symmetry breaking perturbations. We present an asymptotic theory of the study of meandering (quasiperiodic spiral wave solutions) spiral waves which are drifting due to symmetry breaking perturbations. This theory is based on earlier theories: the 1995 Biktashev et al theory of drift of rigidly rotating spirals, and the 1996 Biktashev et al theory of meander of spirals in unperturbed systems. We combine the two theories by first rewriting the 1995 drift theory using the symmetry quotient system method of the 1996 meander theory, and then go on to extend the approach to meandering spirals by considering Floquet theory and using a singular perturbation method. We demonstrate the work of the newly developed theory on simple examples. We also develop a numerical implementation of the quotient system method, demonstrate its numerical convergence and its use in calculations which would be difficult to do by the standard methods, and also link this study to the problem of calculation of response functions of spiral waves.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑