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arXiv 1104.4192math.AP
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一类向列相液晶流体动力学方程组解的整体存在性和稳定性

Global Existence and Stability for a Hydrodynamic System in the Nematic Liquid Crystal Flows

Jihong Zhao, Qiao Liu, Shangbin Cui

摘要:

在本文中,我们考虑一个耦合的流体动力学系统,其中包括Navier-斯托克斯方程的速度场和运动学输运方程的分子取向场。利用Chemin-Lerner对热方程的时空估计和Fourier局部化技巧,证明了当初值属于负阶临界Besov空间时,存在唯一的局部解,并且当初值足够小时,该解是整体解.作为推论,我们得到了整体自相似解的存在性。为了说明所得解与标准意义下的弱解之间的关系,我们建立了一个稳定性结果,该结果直接得出了所有与相同初值相关的整体弱解与所得解一致,即弱-强唯一性成立.

英文摘要:

In this paper we consider a coupled hydrodynamical system which involves the Navier-Stokes equations for the velocity field and kinematic transport equations for the molecular orientation field. By applying the Chemin-Lerner's time-space estimates for the heat equation and the Fourier localization technique, we prove that when initial data belongs to the critical Besov spaces with negative-order, there exists a unique local solution, and this solution is global when initial data is small enough. As a corollary, we obtain existence of global self-similar solutions. In order to figure out the relation between the solution obtained here and weak solution of standard sense, we establish a stability result, which yields in a direct way that all global weak solutions associated with the same initial data must coincide with the solution obtained here, namely, weak-strong uniqueness holds.

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。

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