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arXiv 0804.1628math.AP
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一类奇异相场系统解的存在性和有界性

Existence and boundedness of solutions for a singular phase field system

Elena Bonetti, Pierluigi Colli, Mauro Fabrizio, Gianni Gilardi

摘要:

本文用熵和有序结构平衡定律对描述相变的热力学模型进行了数学分析。我们考虑一个宏观的描述的现象,并提出了模型。然后,针对含有关于温度变量的非线性奇异项的偏微分方程组,研究了其初边值问题边值问题。解的存在性以及相变量$χ$和绝对温度$θ$的有界性。最后,在源项连续依赖于$θ$的Lipschitz的框架下证明了唯一性.

英文摘要:

This paper is devoted to the mathematical analysis of a thermomechanical model describing phase transitions in terms of the entropy and order structure balance law. We consider a macroscopic description of the phenomenon and make a presentation of the model. Then, the initial and boundary value problem is addressed for the related PDE system, which contains some nonlinear and singular terms with respect to the temperature variable. Existence of the solution is shown along with the boundedness of both phase variable $χ$ and absolute temperature $θ$. Finally, uniqueness is proved in the framework of a source term depending Lipschitz continuously on $θ$.

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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