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arXiv 0902.0257math.AP
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Kuramoto-Sivashinsky型模型和适定Burnett方程的整体解和爆破

On global solutions and blow-up for Kuramoto-Sivashinsky-type models, and well-posed Burnett equations

V. A. Galaktionov, E. Mitidieri, S. I. Pohozaev

摘要:

研究了Kuramoto-Sivashinsky方程及其它相关的一维和N维$2m$阶半线性抛物型偏微分方程的初边值问题和Cauchy问题.利用(i)插值理论和Galerkin方法的经典工具,(ii)特征函数和非线性容量方法,(iii)加权Gronwall不等式的Henry版本,(vi)两种尺度(blow-up)参数,对整体解的存在性、爆破和一致界进行了综述.对于IBVP,证明了Dirichlet和Navier边界条件下整体解的存在性.对于一些相关的N维高阶偏微分方程,建立了Cauchy问题整体解的一致有界性。作为另一个相关的应用,研究了经典Navier-斯托克斯方程的高阶推广,即适定的Burnett型方程。作为一个简单的例子,得到了著名的Leray-Prodi-Serrin-Ladyzhenskaya正则性结果的推广.

英文摘要:

The initial boundary-value problem (IBVP) and the Cauchy problem for the Kuramoto--Sivashinsky equation and other related $2m$th-order semilinear parabolic partial differential equations in one and N dimensions are considered. Global existence and blow-up as well as uniform bounds are reviewed by using: (i) classic tools of interpolation theory and Galerkin methods, (ii) eigenfunction and nonlinear capacity methods, (iii) Henry's version of weighted Gronwall's inequalities, and (vi) two types of scaling (blow-up) arguments. For the IBVPs, existence of global solutions is proved for both Dirichlet and "Navier" boundary conditions. For some related higher-order PDEs in N dimensions uniform boundedness of global solutions of the Cauchy problem are established. As another related application, the well-posed Burnett-type equations, which are a higher-order extension of the classic Navier-Stokes equations, are studied. As a simple illustration, a generalization of the famous Leray-Prodi-Serrin-Ladyzhenskaya regularity results is obtained.

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