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arXiv 1503.01279cond-mat.mtrl-sci
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铜从4K到熔化温度的绝热焦耳加热

Adiabatic Joule Heating of Copper from 4 K to the Melting Temperature

Alain Guillet, Fabrice Delamarre

摘要:

考虑铜导线的焦耳效应加热及其电阻率和比热随温度的变化,建立了温度随时间演化的数值和解析解(后者在293 ~ 1356 K之间)。温度与时间的演化遵循朗伯函数。计算是基于假设的绝热加热和均匀的电流分布内的电线。我们证明,在非常低的温度下,加热速率强烈依赖于铜纯度。

英文摘要:

Considering a copper wire heated by Joule effect and the variation of its resistivity and specific heat with temperature, we established numerical and analytical solutions (between 293 and 1356 K for the latter) for the evolution of its temperature over time. The Temperature vs. Time evolution follows a Lambertian function. The calculations are based on the assumption of adiabatic heating and uniform current distribution within the wire. We demonstrate that at very low temperature the heating rate is strongly dependent on copper purity.

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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