Adaptive modelling of variably saturated seepage problems
Adaptive modelling of variably saturated seepage problems
复制标题
可变饱和渗流问题的自适应建模
DOI:
10.1093/qjmam/hbab001
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Ashby B
中科院分区:
文献类型:
--
作者:
Ashby B
In this article, we present a goal-oriented adaptive finite element method for a class of subsurface flow problems in porous media, which exhibit seepage faces. We focus on a representative case of the steady state flows governed by a nonlinear Darcy–Buckingham law with physical constraints on subsurface-atmosphere boundaries. This leads to the formulation of the problem as a variational inequality. The solutions to this problem are investigated using an adaptive finite element method based on a dual-weighted a posteriori error estimate, derived with the aim of reducing error in a specific target quantity. The quantity of interest is chosen as volumetric water flux across the seepage face, and therefore depends on an a priori unknown free boundary. We apply our method to challenging numerical examples as well as specific case studies, from which this research originates, illustrating the major difficulties that arise in practical situations. We summarise extensive numerical results that clearly demonstrate the designed method produces rapid error reduction measured against the number of degrees of freedom.
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DOI:
10.1007/978-3-8348-9546-2
发表时间:
2008-08
期刊:
--
影响因子:
--
作者:
F. Suttmeier
通讯作者:
F. Suttmeier
DOI:
10.1137/140960499
发表时间:
2015
期刊:
SIAM J. Sci. Comput.
影响因子:
--
作者:
K. Cliffe;Joe Collis;P. Houston
通讯作者:
P. Houston
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
C. Scudeler;C. Paniconi;D. Pasetto;M. Putti
通讯作者:
M. Putti
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
H.;Maruyama
通讯作者:
Maruyama
影响因子:
1.7
作者:
H. Blum;F. Suttmeier
通讯作者:
F. Suttmeier