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A pore network study of evaporation from the surface of a drying non-hygroscopic porous medium
AIChE Journal ( IF 3.7 ) Pub Date : 2017-10-30 08:55:49 , DOI: 10.1002/aic.16004
Alireza Attari Moghaddam 1 , Abdolreza Kharaghani 1 , Evangelos Tsotsas 1 , Marc Prat 2, 3
Affiliation  

The phenomena occurring at the surface of a porous medium during drying in the capillary regime are investigated by pore network simulations. The impact of the formation of wet and dry patches at the surface on the drying rate is studied. The simulations indicate an edge effect characterized by a noticeable variation of saturation in a thin layer adjacent to the porous surface. Also, the results indicate a significant nonlocal equilibrium effect at the surface. The simulation results are exploited to test Schlünder's classical model which offers a simple closure relationship between the evaporation rate and the degree of occupancy of the surface by the liquid. In addition to new insights into the surface phenomena, the results open up new prospects for improving the continuum models of the drying process. © 2017 American Institute of Chemical Engineers AIChE J, 2017

中文翻译:

干燥非吸湿性多孔介质表面蒸发的孔网络研究

通过孔隙网络模拟研究了在毛细管状态下干燥过程中在多孔介质表面发生的现象。研究了表面干湿斑块的形成对干燥速率的影响。模拟表明边缘效应的特征在于邻近多孔表面的薄层中饱和度的显着变化。同样,结果表明在表面上明显的非局部平衡效应。仿真结果被用于测试Schlünder的经典模型,该模型在蒸发速率和液体对表面的占有程度之间提供了简单的闭合关系。除了对表面现象的新见解之外,结果还为改善干燥过程的连续模型提供了新的前景。AIChE的Ĵ,2017年
更新日期:2017-10-30
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