论文标题
通过并发引流和蒸发对多孔介质的干燥：孔网络建模研究
Drying of porous media by concurrent drainage and evaporation: A pore network modeling study
论文作者
论文摘要
在多孔培养基干燥期间，可以同时进行排水和蒸发，但是很少研究这些过程与它们对干燥的影响之间的相互作用。在这项工作中，我们开发了一个孔网模型，该模型考虑了带有纳米级孔的多孔介质中的排水，蒸发和稀有的多组分气体传输。使用此模型，我们研究了通过吹扫气体通过其干燥液体溶剂饱和多孔培养基的干燥。模拟表明，干燥在三个阶段进行，而随着干燥在这些阶段的发展，排水效应（蒸发效应）的去除（蒸发效应）变得越来越弱（强）。有趣的是，即使在蒸发效果变得非常强大之后，排水也会对去除溶剂的去除有很大贡献，尤其是当多孔培养基的施加压力差很低时。我们表明，这些现象是排水和蒸发效应之间耦合的结果，而这种耦合取决于工作条件和干燥阶段。
Drainage and evaporation can occur simultaneously during the drying of porous media, but the interactions between these processes and their effects on drying are rarely studied. In this work, we develop a pore network model that considers drainage, evaporation, and rarefied multi-component gas transport in porous media with nanoscale pores. Using this model, we investigate the drying of a liquid solvent-saturated porous medium enabled by the flow of purge gas through it. Simulations show that drying progresses in three stages, and the solvent removal by drainage effects (evaporation effects) becomes increasingly weak (strong) as drying progresses through these stages. Interestingly, drainage can contribute considerably to solvent removal even after evaporation effects become very strong, especially when the applied pressure difference across the porous medium is low. We show that these phenomena are the results of the coupling between the drainage and evaporation effects and this coupling depends on the operating conditions and the stage of drying.
