In this work, we develop a finite differential hot-wire method to uncover the localized heat dissipation physics along microwires. The localized convection effect can be decoupled at the finite differential element with a spatial resolution of 10 microns. The heat convection coefficient is characterized from 314 W m −2 K to 1116 W m −2 K along different positions of microwires with different diameters, which decreases from wire ends to its middle point. The slope of temperature gradient at wire surface versus temperature is determined from 20150 m −1 to 8640 m −1 , which can be used to calculate the boundary layer thickness around microwires.

中文翻译：

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用于微尺度局部传热的有限差分热线法

在这项工作中，我们开发了一种有限差分热线方法，以揭示沿微线的局部散热物理学。局部对流效应可以在有限差分元件上以10微米的空间分辨率解耦。沿着直径不同的微线的不同位置，热对流系数的特征是从314 W m -2 K到1116 W m -2 K，其从线的末端到其中点减小。导线表面的温度梯度相对于温度的斜率从20150 m -1到8640 m -1确定，可用于计算微导线周围的边界层厚度。