Heat and mass transfer in wet porous media in presence of evaporation-condensation
Heat and mass transfer in wet porous media in presence of evaporation-condensation
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DOI：
10.1016/s0017-9310(98)00002-7
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发表时间：
1998-08-01
影响因子：
5.2
通讯作者：
Bloch, JF
中科院分区：
文献类型：
--
作者：
Bouddour, A;Auriault, JL;Bloch, JF
利用周期结构渐近展开的均匀化方法，重新研究了含湿多孔介质中蒸发-冷凝传热传质的模型。为了产生相当于多孔介质的连续介质的“放大”方程，我们从孔隙水平开始。在这个尺度上，物理学是由对流和费克分子扩散与热传递耦合来描述的。相变过程被纳入分析。该方法的主要优点是使用一个系统的，严格的和统一的处理，提供了一个一般的理解，所有的相互作用所涉及的不同的热量和质量传递。进行了四个特征选择模型。它们的有效性域是根据存在的不同现象的相对权重来确定的。与其他模型在文献中的比较。其中一些显示出类似的结构。特别是，不同的宏观模型之间的连续通道进行了研究。最后，非均匀化情形的条件，即，当它是不可能找到一个宏观等效的描述也解决了。(C)1998爱思唯尔科技有限公司版权所有。
The modelling of heat and mass transfer in wet porous media in the presence of evaporation-condensation is revisited by using the homogenization method of asymptotic expansions for periodic structures. In order to produce the 'upscaled' equations for the continuum equivalent to the porous medium, we start from the pore level. At this scale the physics is described by convection and Fick's molecular diffusion coupled with heat transfer. The phase change process is incorporated into the analysis. The main advantage of the method is to use a systematic, rigorous and unified treatment to provide a general comprehension of all the interactions involved by the different heat and mass transfers. Four characteristic selected models are carried out. Their domains of validity are determined in function of the relative weight of the different phenomena in presence. Comparison with other models in the literature is presented. II appears that some of them exhibit a similar structure. In particular, the continuous passage between the different macroscopic models is investigated. Finally, the condition for a non-homogenizable situation, i.e., when it is impossible to find a macroscopic equivalent description is also addressed. (C) 1998 Elsevier Science Ltd. All rights reserved.