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arXiv 2104.01212math.AP
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稳态传热问题中两种材料接触点的估计方法

Estimation Technique for a Contact Point Between two Materials in a Stationary Heat Transfer Problem

Guillermo Federico Umbricht, Diana Rubio, Domingo Alberto Tarzia

摘要:

本文研究了由两个连续的、各向同性的、均质的不同材料组成的、直径可忽略的、完全孤立的杆在其侧面上的稳态传热过程的反问题。在左边界处,施加代表恒定温度源的狄利克雷型条件,而在右边界处考虑模拟对流散热的罗宾型条件。文献中的许多文章集中在界面处的热和应力分析,但没有人致力于估计两种材料之间的接触点位置。在这项工作中,它是假设的接口位置是未知的。一种技术,以确定它从一个独特的噪声流测量在右边界。推导出了由在右边界上测得的热流估算界面点的充要条件。得到了数值解和估计误差的表达式。此外,弹性分析包括研究数据误差的影响。结果表明,我们的方法是有用的,以确定材料界面的位置。

英文摘要:

An inverse problem for a stationary heat transfer process is studied for a totally isolated bar on its lateral surface, of negligible diameter, made up of two consecutive sections of different, isotropic and homogeneous materials. At the left boundary, a Dirichlet type condition is imposed that represents a constant temperature source while a Robin type condition that models the heat dissipation by convection is considered at the right one. Many articles in the literature focus on thermal and stress analysis at the interface but no one is dedicated to the estimation of the contact point location between the two materials. In this work, it is assumed that the interface position is unknown. A technique to determine it from a unique noisy flow measurement at the right boundary is introduced. Necessary and sufficient conditions are derived in order to obtain the estimation of the interface point from a heat flux measured at the right boundary. Numerical solutions are obtained together with an expression for the estimation error. Moreover, an elasticity analysis is included to study the influence of data errors. The results show that our approach is useful for determining the location of the materials interface.

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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