Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017WR020361 |
The foam drainage equation for drainage dynamics in unsaturated porous media | |
Lehmann, P.1; Hoogland, F.1; Assouline, S.2; Or, D.1 | |
2017-07-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:7 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland; Israel |
英文摘要 | Similarity in liquid-phase configuration and drainage dynamics of wet foam and gravity drainage from unsaturated porous media expands modeling capabilities for capillary flows and supplements the standard Richards equation representation. The governing equation for draining foam (or a soil variant termed the soil foam drainage equation-SFDE) obviates the need for macroscopic unsaturated hydraulic conductivity function by an explicit account of diminishing flow pathway sizes as the medium gradually drains. The study provides new and simple analytical expressions for drainage rates and volumes from unsaturated porous media subjected to different boundary conditions. Two novel analytical solutions for saturation profile evolution were derived and tested in good agreement with a numerical solution of the SFDE. The study and the proposed solutions rectify the original formulation of foam drainage dynamics of Or and Assouline (2013). The new framework broadens the scope of methods available for quantifying unsaturated flow in porous media, where the intrinsic conductivity and geometrical representation of capillary drainage could improve understanding of colloid and pathogen transport. The explicit geometrical interpretation of flow pathways underlying the hydraulic functions used by the Richards equation offers new insights that benefit both approaches. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000407895000029 |
WOS关键词 | CORNER FLOW ; INFILTRATION ; LIQUIDS ; PORE ; CONDUCTIVITY ; MECHANISMS |
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/21389 |
专题 | 资源环境科学 |
作者单位 | 1.Swiss Fed Inst Technol, Dept Environm Syst Sci, Soil & Terr Environm Phys, Zurich, Switzerland; 2.Volcani Ctr, Inst Soils Water & Environm Sci ARO, Dept Environm Phys & Irrigat, Bet Dagan, Israel |
推荐引用方式 GB/T 7714 | Lehmann, P.,Hoogland, F.,Assouline, S.,et al. The foam drainage equation for drainage dynamics in unsaturated porous media[J]. WATER RESOURCES RESEARCH,2017,53(7). |
APA | Lehmann, P.,Hoogland, F.,Assouline, S.,&Or, D..(2017).The foam drainage equation for drainage dynamics in unsaturated porous media.WATER RESOURCES RESEARCH,53(7). |
MLA | Lehmann, P.,et al."The foam drainage equation for drainage dynamics in unsaturated porous media".WATER RESOURCES RESEARCH 53.7(2017). |
条目包含的文件 | 条目无相关文件。 |
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