A finite-element algorithm for modeling variably saturated flows
文献类型：期刊论文
| 作者 | Wu MX(吴梦喜) ; Wu MX(吴梦喜)
|
| 刊名 | Journal of Hydrology
 |
| 出版日期 | 2010-09-26 |
| 卷号 | volume 394期号:3-4页码:315-323 |
| 通讯作者邮箱 | wumx@imech.ac.cn |
| 关键词 | Richards’ equation Variably saturated flow Finite element method Transient water table Infiltration |
| ISSN号 | 0022-1694 |
| 通讯作者 | 吴梦喜 |
| 合作状况 | 其它 |
| 中文摘要 | A general numerical algorithm in the context of finite element scheme is developed to solve Richards’ equation, in which a mass-conservative, modified head based scheme (MHB) is proposed to approximate the governing equation, and mass-lumping techniques are used to keep the numerical simulation stable. The MHB scheme is compared with the modified Picard iteration scheme (MPI) in a ponding infiltration example. Although the MHB scheme is a little inferior to the MPI scheme in respect of mass balance, it is superior in convergence character and simplicity. Fully implicit, explicit and geometric average conductivity methods are performed and compared, the first one is superior in simulation accuracy and can use large time-step size, but the others are superior in iteration efficiency. The algorithm works well over a wide variety of problems, such as infiltration fronts, steady-state and transient water tables, and transient seepage faces, as demonstrated by its performance against published experimental data. The algorithm is presented in sufficient detail to facilitate its implementation. |
| 学科主题 | 流体力学 ; 交叉与边缘领域的力学 |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000285701200004 |
| 公开日期 | 2010-11-04 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/42445]  |
| 专题 | 力学研究所_环境力学重点实验室(2009-2011) |
| 通讯作者 | Wu MX(吴梦喜) |
| 推荐引用方式 GB/T 7714 | Wu MX,Wu MX. A finite-element algorithm for modeling variably saturated flows[J]. Journal of Hydrology,2010,volume 394(3-4):315-323. |
| APA | Wu MX,&吴梦喜.(2010).A finite-element algorithm for modeling variably saturated flows.Journal of Hydrology,volume 394(3-4),315-323. |
| MLA | Wu MX,et al."A finite-element algorithm for modeling variably saturated flows".Journal of Hydrology volume 394.3-4(2010):315-323. |
入库方式： OAI收割
来源：力学研究所
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