Phase reduction of limit-torus solutions to partial differential algebraic equations

Phase reduction of limit-torus solutions to partial differential algebraic equations
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偏微分代数方程极限环面解的相约化

DOI:
10.1103/physrevresearch.1.033130
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发表时间:
2019
影响因子:
4.2
通讯作者:
Yoji Kawamura
Yoji Kawamura
中科院分区:
--
文献类型:
--
作者:
岩山洋士;藤瀬光香;James Harries;鈴木紀裕;東善郎;久間晋;繁政英治;渡部昌平;岩山洋士;Yoji Kawamura

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极限环解描述了一个移动和振荡的解。它的特征在于两个相变量,空间相位和时间相位,这分别表示的位置和振动的解决方案,。在这里,我们开发了一个理论框架的相位减少的极限环解偏微分代数方程或偏微分方程的约束。我们推导出这两个阶段的相位灵敏度函数,这些功能量化的时空相位响应的解决方案下施加在每个空间点和每个时间的弱扰动。本文以二维不可压Navier-Stokes流系统中的振荡热对流为研究对象。
A limit-torus solution describes a traveling and oscillating solution. It is characterized by two phase variables, spatial phase and temporal phase, which indicate the position and oscillation of the solution, respectively. Here, we develop a theoretical framework for the phase reduction of limit-torus solutions to partial differential algebraic equations or partial differential equations with constraints. We derive phase sensitivity functions for the two phases; these functions quantify the spatiotemporal phase responses of the solution under weak perturbations applied at each spatial point and at each time. We consider oscillatory thermal convection in a two-dimensional incompressible Navier-Stokes flow system with lateral periodicity as a prototype.
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