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arXiv 1104.5684math.AP
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可压缩双折射液晶流的强解

Strong solutions of the compressible nematic liquid crystal flow

Tao Huang, Changyou Wang, Huanyao Wen

摘要:

研究了简化Ericksen-Leslie方程组在区域$Ω\subset\mathbb R^3$中的可压缩双折射液晶流动的强解.我们首先证明了局部存在唯一的强解,只要初始数据$ρ_0, u_0, d_0$是充分正则的,并满足自然相容条件。初始密度函数$ρ_0$可以在开子集上消失(即,可能存在初始真空)。然后,我们证明了这样的局部强解在有限时间爆破的数量$\|ρ\|_{L^\infty_tL^\infty_x}$和$\|\nabla d\|_{L^3_tL^\infty_x}$方面的可能崩溃的一个标准。

英文摘要:

We study strong solutions of the simplified Ericksen-Leslie system modeling compressible nematic liquid crystal flows in a domain $Ω\subset\mathbb R^3$. We first prove the local existence of unique strong solutions provided that the initial data $ρ_0, u_0, d_0$are sufficiently regular and satisfy a natural compatibility condition. The initial density function $ρ_0$ may vanish on an open subset (i.e., an initial vacuum may exist). We then prove a criterion for possible breakdown of such a local strong solution at finite time in terms of blow up of the quantities $\|ρ\|_{L^\infty_tL^\infty_x}$ and $\|\nabla d\|_{L^3_tL^\infty_x}$.

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