干旱区生态环境知识资源中心(Arid): The effects of spanwise canopy heterogeneity on the flow field and evaporation rates

Arid

DOI	10.1007/s10652-023-09946-w
	The effects of spanwise canopy heterogeneity on the flow field and evaporation rates
	Winiarska, E.; Soffer, R.; Klopfer, H.; van Hout, R.; Liberzon, D.
通讯作者	van Hout, R
来源期刊	ENVIRONMENTAL FLUID MECHANICS
ISSN	1567-7419
EISSN	1573-1510
出版年	2023
卷号	23 期号:6 页码:1313-1339
英文摘要	The effect of spanwise canopy heterogeneity on the turbulent wind flow field and associated evaporation rates was investigated by combined stereoscopic particle image velocimetry (stereo-PIV) and evaporation rate measurements on a model canopy in an atmospheric boundary layer wind tunnel. The model was designed to simulate a mature corn canopy, based on a similar wall-normal distribution of the projected frontal area index. Stereo-PIV measurements were performed in wall-parallel planes across the spanwise heterogeneity at several elevations. For comparison, measurements were also performed for a homogeneous canopy layout. For the heterogeneous layout, large spanwise gradients of the mean streamwise velocity at the canopy edge were observed, resulting in high shear and high peak values of the in-plane Reynolds shear stress component. Local evaporation rates were measured directly utilizing a specially designed wicks based system. Measurements were conducted at three locations positioned in a line, perpendicular to the incoming flow, across the heterogeneity. The spanwise heterogeneity did not alter the well-accepted sweep-ejection mechanism, sweeps dominated flow was recorded at the sheltered wick positions. Evaporation rates increased with local mean streamwise velocity and power-law based correlations for the Sherwood number versus Reynolds number were derived for sheltered and exposed evaporating wicks. Turbulent flow structures, in the form of sweeps and ejections, were important both in wall-normal and transverse directions (for a heterogeneous canopy). The results indicated that in arid regions, dry air transported in the transverse direction into the canopy is likely to lead to increased evaporation rates at canopy edges.
英文关键词	Canopy flows Spanwise heterogeneity Evaporation rates Wind tunnel measurements Stereo-PIV
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001066743700001
WOS关键词	TURBULENT-BOUNDARY-LAYER ; SECONDARY CURRENTS ; SURFACE-ROUGHNESS ; PIV MEASUREMENTS ; OPEN-CHANNEL ; STEP CHANGE ; WATER ; STRESS ; SMOOTH ; RANGE
WOS类目	Environmental Sciences ; Mechanics ; Meteorology & Atmospheric Sciences ; Oceanography ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Mechanics ; Meteorology & Atmospheric Sciences ; Oceanography ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396141
推荐引用方式 GB/T 7714	Winiarska, E.,Soffer, R.,Klopfer, H.,et al. The effects of spanwise canopy heterogeneity on the flow field and evaporation rates[J],2023,23(6):1313-1339.
APA	Winiarska, E.,Soffer, R.,Klopfer, H.,van Hout, R.,&Liberzon, D..(2023).The effects of spanwise canopy heterogeneity on the flow field and evaporation rates.ENVIRONMENTAL FLUID MECHANICS,23(6),1313-1339.
MLA	Winiarska, E.,et al."The effects of spanwise canopy heterogeneity on the flow field and evaporation rates".ENVIRONMENTAL FLUID MECHANICS 23.6(2023):1313-1339.