arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1906.09658math.AP
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全Ericksen-Leslie模型下双相液晶的Poillille流动

Poiseuille flow of nematic liquid crystals via the full Ericksen-Leslie model

Geng Chen, Tao Huang, Weishi Liu

摘要:

本文研究了双折射液晶的全Ericksen-Leslie模型Poiffille流的Cauchy问题。该模型是一个关于速度的抛物型方程和关于指向矢的拟线性波动方程的耦合系统。对于一个特定的选择的几个物理参数值,我们构造的解决方案,光滑的初始数据和有限的能量,产生,在有限的时间,尖点奇点-梯度爆破。尖点奇异性的形成是由于解的类波特征的局部相互作用,这与抛物型Ericksen-Leslie系统有限时间奇异性的形成机制不同.物理模型的有限时间奇点形成可能会引起一些应用方面的关注。然而,这是令人满意地解决;更准确地说,我们能够建立整体存在的弱解是Hölder连续的,并有界的能量。本文的一个主要贡献是我们的速度上的磁通密度的导演和揭示的奇异性取消的效果识别-磁通密度保持一致有界,而它的两个组件接近无穷大的形成尖点奇点。

英文摘要:

In this paper, we study the Cauchy problem of the Poiseuille flow of full Ericksen-Leslie model for nematic liquid crystals. The model is a coupled system of a parabolic equation for the velocity and a quasilinear wave equation for the director. For a particular choice of several physical parameter values, we construct solutions with smooth initial data and finite energy that produce, in finite time, cusp singularities - blowups of gradients. The formation of cusp singularity is due to local interactions of wave-like characteristics of solutions, which is different from the mechanism of finite time singularity formations for the parabolic Ericksen-Leslie system. The finite time singularity formation for the physical model might raise some concerns for purposes of applications. This is, however, resolved satisfactorily; more precisely, we are able to establish the global existence of weak solutions that are Hölder continuous and have bounded energy. One major contribution of this paper is our identification of the effect of the flux density of the velocity on the director and the reveal of a singularity cancellation - the flux density remains uniformly bounded while its two components approach infinity at formations of cusp singularities.

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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