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arXiv 2404.13482math.AP
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具有退化迁移率的相场晶体模型的非负弱解

A Nonnegative Weak Solution to the Phase Field Crystal Model with Degenerate Mobility

Toai Luong, Steve Wise

AI总结:

本文研究具有退化迁移率的相场晶体方程,证明了在正初始数据下非负弱解的存在性,并验证其满足能量耗散不等式。

摘要:

相场晶体是一种用于描述介观尺度下晶体材料行为的模型。在本研究中,我们考察了一个受退化迁移率$M(u)$(当$u\leq 0$时为零)影响的相场晶体方程的适定性。首先,我们证明了具有非退化截断迁移率的相场晶体方程弱解的存在性。然后,假设初始数据$u_0(x)$为正,我们建立了退化情形下非负弱解的存在性。该解是非退化迁移率对应解的极限。我们还验证了这样的弱解满足能量耗散不等式。

英文摘要:

Phase field crystal is a model used to describe the behavior of crystalline materials at the mesoscale. In this study, we investigate the well-posedness of a phase field crystal equation subject to a degenerate mobility $M(u)$ that equals zero for $u\leq 0$. First, we prove the existence of a weak solution to a phase field crystal equation with non-degenerate cutoff mobility. Then, assuming that the initial data $u_0(x)$ is positive, we establish the existence of a nonnegative weak solution to the degenerate case. Such solution is the limit of solutions corresponding to non-degenerate mobilities. We also verify that such a weak solution satisfies an energy dissipation inequality.

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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