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Measurement of a thermal exchange coefficient in porous media by infrared thermography - two-temperature model application

机译:红外热成像法测量多孔介质中的热交换系数-两温模型应用

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In this paper, a two-equation model is used to describe macroscopically heat transfer in porous media when the constitutive phases are not in local thermal equilibrium (initially Vortmeyer et al., 1974 and Schlunder, 1975, see review in Quintard et al., 1997). Here the words "porous media" may refer to real porous media, or the concept can be extended to systems like composite materials, some heat exchangers, etc. Such macroscopic models involve a heat exchange coefficient between the phases. The objective of this study is to propose an experimental methodology to measure this exchange coefficient. The idea isto gather sufficient information in terms of temperature fields in order to calculate macroscopic temperature evolutions, and derive the relevant effective transport properties. To solve this problem, the infrared thermography is a tool of choice.
机译:在本文中,当本构相不处于局部热平衡状态时,使用两个方程模型来宏观描述多孔介质中的传热(最初是Vortmeyer等人,1974年; Schlunder,1975年,参见Quintard等人的评论, 1997)。在此,“多孔介质”一词可以指代真正的多孔介质,或者该概念可以扩展到诸如复合材料,某些热交换器等系统。此类宏观模型涉及相之间的热交换系数。这项研究的目的是提出一种测量该交换系数的实验方法。想法是收集有关温度场的足够信息,以便计算宏观温度变化并得出相关的有效传输性质。为了解决这个问题,红外热成像是一种选择的工具。

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