气候变化领域集成服务门户(CCPortal): Simulating Airflow Around Flexible Vegetative Windbreaks

CCPortal

DOI	10.1029/2021JD034578
	Simulating Airflow Around Flexible Vegetative Windbreaks
	Liu R.; Zhang J.; Yang X.; Liu S.; Kang L.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:19
英文摘要	Vegetative windbreaks play an important role in reducing soil erosion and sand storms, which are widely applied in arid/semiarid regions. An optimal design of vegetative windbreaks is essential in aeolian engineering practice. In this study, three-dimensional airflows around multiple arrangements of vegetative windbreaks were simulated using a modified Reynolds-Average Navier-Stokes (RANS)-based computational fluid dynamics (CFD) model, based on which, optimal designs of vegetative windbreaks were discussed. We proposed a correction factor in the source terms of the momentum and turbulent transport equations representing the effects due to the vibration of the vegetative windbreaks, which was further calibrated using both simulated and wind tunnel experimental results. Moreover, a quantitative expression of the correction factors associated with structural parameters of vegetative windbreaks was established and verified. For optimal designs to reduce wind erosion, a suite of numerical experiments was conducted to find the optimal height, leaf area density, and vegetation fraction of the vegetative windbreaks under different free-stream wind speeds. The results identified that under low free-stream wind speed (6.4 m/s), the optimal parameters are 9.0 cm, 0.45 cm2/cm3, and 3.92%. Under moderate free-stream wind speed (8.0 m/s), those optimal parameters are 12.4 cm, 0.47 cm2/cm3, and 3.92%. Under relatively high free-stream wind speed (10.8 m/s), the optimal parameters are 12.4 cm, 0.47 cm2/cm3, and 8.00%. The results of the current study will aid in optimizing vegetative windbreak designs and preventing wind erosion in aeolian engineering. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	computational fluid dynamics; flexibility; vegetative windbreaks; wind erosion; wind tunnel experiment
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236959
作者单位	State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University, Beijing, China; School of Environmental and Geographical Sciences (SEGS), Shanghai Normal University, Institute of Urban Study, Shanghai, China; Shanghai Yangtze River Delta Urban Wetland Ecosystem National Field Observation and Research Station, Shanghai, China
推荐引用方式 GB/T 7714	Liu R.,Zhang J.,Yang X.,et al. Simulating Airflow Around Flexible Vegetative Windbreaks[J],2021,126(19).
APA	Liu R.,Zhang J.,Yang X.,Liu S.,&Kang L..(2021).Simulating Airflow Around Flexible Vegetative Windbreaks.Journal of Geophysical Research: Atmospheres,126(19).
MLA	Liu R.,et al."Simulating Airflow Around Flexible Vegetative Windbreaks".Journal of Geophysical Research: Atmospheres 126.19(2021).