arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.08011math.AP
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幂律流的非唯一性

Non Uniqueness of power-law flows

Jan Burczak, Stefano Modena, László Székelyhidi

摘要:

我们应用凸积分的技巧得到幂律流体在$d\ge 2$维上的非唯一性和存在性结果。当幂指数$q$低于紧性阈值(即$q \in (1, \frac{2d}{d+2})$)时,我们证明了Leray-Hopf解的不适定性.对于更广泛的一类指数$q \in (1, \frac{3d+2}{d+2})$,我们表现出不适定性的分布(非勒雷-霍普夫)的解决方案,扩展了开创性的文件巴克马斯特和Vicol。在这个更广泛的类中,我们还为$L^2$中的每个数据构造非唯一的解决方案。

英文摘要:

We apply the technique of convex integration to obtain non-uniqueness and existence results for power-law fluids, in dimension $d\ge 2$. For the power index $q$ below the compactness threshold, i.e. $q \in (1, \frac{2d}{d+2})$, we show ill-posedness of Leray-Hopf solutions. For a wider class of indices $q \in (1, \frac{3d+2}{d+2})$ we show ill-posedness of distributional (non-Leray-Hopf) solutions, extending the seminal paper of Buckmaster and Vicol. In this wider class we also construct non-unique solutions for every datum in $L^2$.

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