A finite-element algorithm for modeling variably saturated flows

IMECH-IR > 环境力学重点实验室(2009-2011)

	A finite-element algorithm for modeling variably saturated flows
	Wu MX(吴梦喜); Wu MX(吴梦喜)
发表期刊	Journal of Hydrology
	2010-09-26
卷号	volume 394 期号:3-4 页码:315-323
ISSN	0022-1694
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.
关键词	Richards’ Equation Variably Saturated Flow Finite Element Method Transient Water Table Infiltration
学科领域	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
引用统计	被引频次：26[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/42445
专题	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.

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