Numerical Procedure for Simulating the Two-Phase Flow in Unsaturated Soils with Hydraulic Hysteresis
文献类型：期刊论文
| 作者 | Wei, Changfu; Chen, Pan |
| 刊名 | INTERNATIONAL JOURNAL OF GEOMECHANICS
 |
| 出版日期 | 2016 |
| 卷号 | 16期号:1页码:- |
| 关键词 | Porous media Hysteresis Soil water Unsaturated flow Numerical models Finite-element method |
| ISSN号 | 1532-3641 |
| DOI | 10.1061/(ASCE)GM.1943-5622.0000505 |
| 英文摘要 | When modeling the seepage process in a variably saturated porous medium, it is crucial to properly characterize the effects of hydraulic hysteresis. In this paper, a theoretical model of two-phase flow in porous media is introduced, in which an internal state variable-based model of capillary hysteresis is incorporated. Using this theoretical model, a fully coupled finite-element procedure is developed and implemented into a computer code. The numerical procedure is used to simulate the two-phase flow in the unsaturated soils experiencing various drying/wetting cycles. The simulative results are then compared with the experimental data available in existing literature, showing that the proposed procedure is capable of simulating the two-phase flow processes in the porous media subjected to arbitrary drying/wetting cycles. It is demonstrated that under a nonmonotonic flow condition, the effects of hydraulic hysteresis on the water infiltration and redistribution processes in a soil-column test are significant, and in addition, the effects of air phase cannot be neglected. Noticeably, the proposed procedure can be used to track the hydraulic paths that a soil layer experiences, and hence, the procedure is useful in modeling the water infiltration and moisture redistribution processes in soil layers during a long-term intermittent precipitation event or nonmonotonic underground water-table variation. |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000370074100028 |
| 出版者 | ASCE-AMER SOC CIVIL ENGINEERS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/3821]  |
| 专题 | 岩土力学所知识全产出_期刊论文 国家重点实验室知识产出_期刊论文 |
| 作者单位 | Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn |
| 推荐引用方式 GB/T 7714 | Wei, Changfu,Chen, Pan. Numerical Procedure for Simulating the Two-Phase Flow in Unsaturated Soils with Hydraulic Hysteresis[J]. INTERNATIONAL JOURNAL OF GEOMECHANICS,2016,16(1):-. |
| APA | Wei, Changfu,&Chen, Pan.(2016).Numerical Procedure for Simulating the Two-Phase Flow in Unsaturated Soils with Hydraulic Hysteresis.INTERNATIONAL JOURNAL OF GEOMECHANICS,16(1),-. |
| MLA | Wei, Changfu,et al."Numerical Procedure for Simulating the Two-Phase Flow in Unsaturated Soils with Hydraulic Hysteresis".INTERNATIONAL JOURNAL OF GEOMECHANICS 16.1(2016):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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