Water nanofluid falling film on a Non-Darcy porous vertical plate evaporator

IF 2.5 4区工程技术 Q2 ENGINEERING, MECHANICAL

Journal of Porous Media Pub Date : 2024-01-01 DOI:10.1615/jpormedia.2024050229

Abdelaziz Nasr

引用次数: 0

Abstract

A numerical analysis of the falling nanofilm evaporation on a vertical porous wetted wall by mixed convection was performed. The right-wall was dry and isothermal, while the left wall is embedded in a non-Darcy porous medium filled with nanofilm (water+low fraction volume of copper nanoparticles) and exposed to a uniform heat flux from the outside. The nanofluid film makes up the liquid, while dry air and water vapor comprise the gas mixture. The results obtained from this study pertain to the impact of porosity, thickness of the porous layer, concentration of nanoparticles on heat and mass exchange, and liquid film evaporation. The results indicate that mass and heat exchange, as well as liquid film evaporation, are improved in the case of nanofilm by introducing a liquid-saturated porous medium. It is shown that in the case of a porous layer, the dispersion of the nanoparticles into water film ameliorates the liquid film evaporation of the plate evaporator and weakly improves the mass and heat exchange.

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非达西多孔垂直板式蒸发器上的纳米水流降膜

研究人员通过混合对流对垂直多孔湿润壁上的下落纳米薄膜蒸发进行了数值分析。右侧墙壁干燥且等温，左侧墙壁嵌入充满纳米薄膜（水+低分数体积的纳米铜粒子）的非达西多孔介质中，并暴露在来自外部的均匀热流中。纳米流体薄膜构成液体，而干燥空气和水蒸气构成气体混合物。研究结果涉及多孔性、多孔层厚度、纳米颗粒浓度对热量和质量交换以及液膜蒸发的影响。结果表明，通过引入液体饱和多孔介质，纳米薄膜的质量和热量交换以及液膜蒸发都得到了改善。结果表明，在多孔层的情况下，纳米粒子在水膜中的分散改善了板式蒸发器的液膜蒸发，并微弱地改善了质量和热交换。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Porous Media 工程技术-工程：机械

CiteScore

3.50

自引率

8.70%

发文量

审稿时长

12.5 months

期刊介绍： The Journal of Porous Media publishes original full-length research articles (and technical notes) in a wide variety of areas related to porous media studies, such as mathematical modeling, numerical and experimental techniques, industrial and environmental heat and mass transfer, conduction, convection, radiation, particle transport and capillary effects, reactive flows, deformable porous media, biomedical applications, and mechanics of the porous substrate. Emphasis will be given to manuscripts that present novel findings pertinent to these areas. The journal will also consider publication of state-of-the-art reviews. Manuscripts applying known methods to previously solved problems or providing results in the absence of scientific motivation or application will not be accepted. Submitted articles should contribute to the understanding of specific scientific problems or to solution techniques that are useful in applications. Papers that link theory with computational practice to provide insight into the processes are welcome.