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DOI	10.1016/j.atmosres.2020.105123
	On the aerodynamic fog collection efficiency of fog water collectors via three-dimensional numerical simulations
	Carvajal D.; Silva-Llanca L.; Larraguibel D.; González B.
发表日期	2020
ISSN	0169-8095
卷号	245
英文摘要	Fog water collection gained interest in recent years as an emerging solution for water scarcity in arid and semi-arid areas. During a fog event, a porous mesh screen of plastic polymer retains the water through droplet impaction, where the droplets coalesce and trickle into a gutter for collection. This type of collecting system has existed since the 1960s; however, a substantial lack of understanding remains as to the aerodynamics that dominates the collection phenomena. The Aerodynamic Collection Efficiency (ηa) is the determining factor in the overall performance of such systems. This paper aims to further the fundamental knowledge on the aerodynamic behavior during fog collection. For this, a three-dimensional computational fluid dynamics model was developed, where the collector's mesh was modeled as a porous medium, which simulates a conventional two-dimensional double layer mesh. A parametric study was carried out varying the mesh's geometric characteristics (flat and concave), mesh-to-ground distance, and wind speed. The effect of wind speed on aerodynamic collection efficiency is mainly determined by the relative relationship between the viscous and inertial pressure drop in the porous medium. A greater curvature reduces the mesh's airflow impedance, leading to a significant improvement of the aerodynamic collection efficiency. Within the parameter range of our study, we found a maximum aerodynamic collection efficiency of 35% for the largest curvature (1.1 m), the highest mesh-to-ground distance (2 m), and the maximum wind speed (5 to 7 m s−1). © 2020 Elsevier B.V.
英文关键词	Aerodynamic collection efficiency; Computational fluid dynamics; Fog water collection; Turbulence numerical simulations
语种	英语
scopus关键词	Aerodynamics; Computational fluid dynamics; Drops; Efficiency; Fog; Mesh generation; Porous materials; Wind; Arid and semi-arid areas; Collecting systems; Collection efficiency; Geometric characteristics; Inertial pressure; Maximum wind speed; Three dimensional computational fluid dynamics; Three-dimensional numerical simulations; Collector efficiency; aerodynamics; atmospheric modeling; climate modeling; computational fluid dynamics; fog; numerical model; three-dimensional modeling
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141815
作者单位	Universidad de La Serena, Instituto de Investigación Multidisciplinario en Ciencia y Tecnología, Benavente 980, La Serena, Chile; Universidad de La Serena, Instituto de Investigación Multidisciplinario en Ciencia y Tecnología, Departamento de Ingeniería Mecánica, Benavente 980, La Serena, Chile
推荐引用方式 GB/T 7714	Carvajal D.,Silva-Llanca L.,Larraguibel D.,et al. On the aerodynamic fog collection efficiency of fog water collectors via three-dimensional numerical simulations[J],2020,245.
APA	Carvajal D.,Silva-Llanca L.,Larraguibel D.,&González B..(2020).On the aerodynamic fog collection efficiency of fog water collectors via three-dimensional numerical simulations.Atmospheric Research,245.
MLA	Carvajal D.,et al."On the aerodynamic fog collection efficiency of fog water collectors via three-dimensional numerical simulations".Atmospheric Research 245(2020).