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arXiv 2312.01705math.APmath-phmath.FAmath.MPmath.OC
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不规则界面上热扩散最优形状的存在性

Existence of optimal shapes for heat diffusions across irregular interfaces

Gabriel Claret, Anna Rozanova-Pierrat

AI总结:

本文研究不规则界面上两种介质间的热传导问题,通过引入双侧迹算子和Mosco收敛,证明了一类允许分形边界的(ε, ∞)-域中存在使热能传递最大化的最优形状,而Lipschitz域中通常无法达到该最优值。

摘要:

我们考虑一个跨越不规则界面——即非Lipschitz或分形界面——在两种介质(一种热介质和一种冷介质)之间的热传导问题。该界面被建模为一个d-上正则测度的支集。我们引入了双侧扩张域的内部和外部迹算子的性质,这使得能够在一大类域上证明该问题的适定性(在Hadamard意义下),该类域包含正则域,也包含具有可变边界维数的域。然后,我们证明了与其中一个域的热含量以及(ε, ∞)-域的热传递相关联的能量形式在Mosco意义下的收敛性。最后,我们证明了在一类允许分形边界的(ε, ∞)-域中,使热能传递最大化的最优形状的存在性,而该最优值在Lipschitz域类中通常无法达到。

英文摘要:

We consider a heat transmission problem across an irregular interface -- that is, non-Lipschitz or fractal -- between two media (a hot one and a cold one). The interface is modelled as the support of a d-upper regular measure. We introduce the proprieties of the interior and exterior trace operators for two-sided extension domains, which allow to prove the well-posedness (in the sense of Hadamard) of the problem on a large class of domains, which contains regular domains, but also domains with variable boundary dimension. Then, we prove the convergence in the sense of Mosco of the energy form connected to the heat content of one of the domains and the heat transfer for ($ε$, $\infty$)-domains. Finally, we prove the existence of an optimal shape maximizing the heat energy transfer in a class of ($ε$, $\infty$)-domains, allowing fractal boundaries, while that optimum can generally not be reached in the class of Lipschitz domains.

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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