Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR023423 |
Experimental and Numerical Study of Evaporation From Wavy Surfaces by Coupling Free Flow and Porous Media Flow | |
Gao, Bo1; Davarzani, Hossein2; Helmig, Rainer3; Smits, Kathleen M.1,4 | |
2018-11-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:11页码:9096-9117 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; France; Germany |
英文摘要 | The macroscale roughness of the soil surface has significant influences on the mass/energy interactions between the subsurface and the atmosphere during evaporation. However, most previous works only consider evaporation behavior from flat surfaces. Based on experimental and numerical approaches, the goal of this work is to provide a framework for the understanding of the mechanisms of evaporation from irregular soil surfaces at representative elementary volume scale. A coupling free flow-porous media flow model was developed to describe evaporation under nonisothermal conditions. For simplicity, sinusoidal-type wavy surfaces were considered. To validate this modeling approach, an experiment using an open-ended wind tunnel and soil tank was conducted. The experimental system was instrumented with various environmental sensors to continuously collect atmospheric and subsurface data. Results demonstrate that the surface roughness directly affects both atmospheric and diffusion-dominated stages I and II evaporation behavior, respectively. The atmospheric conditions directly affect the boundary layer during stage I. The evaporation rate is determined by the diffusion in the boundary layer, but not that in the porous media. The soil properties exert intrinsic influence on the capillary flow and determine the evaporation amount. The complex interaction between capillarity and the boundary layer leads to a heterogeneous distribution of evaporative flux with undulation (i.e., location along the soil surface) and time. Additionally, more and steeper waves indicate more influence from capillary flow, enhancing evaporation compared to a single wave system with the same wave amplitude, while steeper waves also result in a thicker boundary layer and weaken evaporation. |
英文关键词 | evaporation wavy surfaces coupling free flow and porous media flow model |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000453369400030 |
WOS关键词 | TURBULENT-FLOW ; PHASE-CHANGE ; SOIL ; WATER ; TRANSPORT ; ROUGHNESS ; HEAT ; TILLAGE ; MASS ; WALL |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/22014 |
专题 | 资源环境科学 |
作者单位 | 1.Colorado Sch Mines, Dept Civil & Environm Engn, Golden, CO 80401 USA; 2.D3E, Bur Rech Geol & Minieres, Orleans, France; 3.Univ Stuttgart, Dept Hydromech & Modelling Hydrosyst, Stuttgart, Germany; 4.Univ Texas Arlington, Dept Civil Engn, Arlington, TX 76019 USA |
推荐引用方式 GB/T 7714 | Gao, Bo,Davarzani, Hossein,Helmig, Rainer,et al. Experimental and Numerical Study of Evaporation From Wavy Surfaces by Coupling Free Flow and Porous Media Flow[J]. WATER RESOURCES RESEARCH,2018,54(11):9096-9117. |
APA | Gao, Bo,Davarzani, Hossein,Helmig, Rainer,&Smits, Kathleen M..(2018).Experimental and Numerical Study of Evaporation From Wavy Surfaces by Coupling Free Flow and Porous Media Flow.WATER RESOURCES RESEARCH,54(11),9096-9117. |
MLA | Gao, Bo,et al."Experimental and Numerical Study of Evaporation From Wavy Surfaces by Coupling Free Flow and Porous Media Flow".WATER RESOURCES RESEARCH 54.11(2018):9096-9117. |
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