This work aims to present a method for simultaneously estimating the thermal conductivity, k , and specific heat, c p , in samples of stainless steel 304 and cemented carbide by accounting the imperfect thermal contact at the heater–sample interface. A transient one-dimensional heat conduction model with constant thermal properties is used. The metallic sample is placed in the middle of a polyimide heater and a thermal insulator. A constant heat flux is applied on the specimen upside surface and a thermal insulation condition is maintained on the opposing surface, where a type T thermocouple measures the temperature response. Contact resistance is determined and accounted for as a reducing factor on heat flux. Instead of considering a lumped model, a microscopic approach of the contacting regions is used to describe both the surface roughness and the fluid gap. With the intention of guaranteeing simultaneous and reliable estimates for both thermal properti...

中文翻译：

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接触电阻分析可用于同时估算金属的热性能

这项工作旨在提出一种方法，通过考虑加热器-样品界面处的不完美热接触，来同时估算不锈钢304和硬质合金样品中的热导率k和比热cp。使用具有恒定热特性的瞬态一维热传导模型。将金属样品放在聚酰亚胺加热器和热绝缘体的中间。将恒定的热通量施加到样品的上表面，并在相对的表面上保持绝热状态，在该表面上，T型热电偶测量温度响应。确定接触电阻并将其作为热通量的降低因素。而不是考虑集总模型，接触区域的微观方法用于描述表面粗糙度和流体间隙。为了保证同时对两个热属性进行可靠的估算，...