Subharmonic dynamics of wave trains in the Korteweg‐de Vries/Kuramoto‐Sivashinsky equation
Subharmonic dynamics of wave trains in the Korteweg‐de Vries/Kuramoto‐Sivashinsky equation
复制标题
Korteweg–de Vries/Kuramoto–Sivashinsky 方程中波列的分谐波动力学
DOI:
10.1111/sapm.12475
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发表时间:
2021
影响因子:
2.7
通讯作者:
Perkins, Wesley R.
中科院分区:
文献类型:
--
作者:
Johnson, Mathew A.;Perkins, Wesley R.
We study the stability and nonlinear local dynamics of spectrally stable periodic wave trains of the Korteweg‐de Vries/Kuramoto‐Sivashinsky equation when subjected to classes of periodic perturbations. It is known that for each , such a ‐periodic wave train is asymptotically stable to ‐periodic, i.e., subharmonic, perturbations, in the sense that initially nearby data will converge asymptotically to a small Galilean boost of the underlying wave, with exponential rates of decay. However, both the allowable size of initial perturbations and the exponential rates of decay depend on and, in fact, tend to zero as , leading to a lack of uniformity in such subharmonic stability results. Our goal here is to build upon a recent methodology introduced by the authors in the reaction–diffusion setting and achieve a subharmonic stability result, which is uniform in . This work is motivated by the dynamics of such wave trains when subjected to perturbations that are localized (i.e., integrable on the line).
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DOI:
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