On the computation of Darcian velocity and mass balance in the finite element modeling of groundwater flow

研究成果: 雜誌貢獻期刊論文同行評審

113 引文 斯高帕斯(Scopus)

摘要

Darcian velocity has been conventionally calculated in the finite element modeling of groundwater flow by taking the derivatives of the computed pressure field. This results in discontinuities in the velocity field at nodal points and element boundaries. Discontinuities become enormous when the computed pressure field is far from a linear distribution. It is proposed in this paper that the finite element procedure that is used to simulate the pressure field or the moisture content field also be applied to Darcy's law with the derivatives of the computed pressure field as the load function. The problem of discontinuity is then eliminated, and the error of mass balance over the region of interest is much reduced. The reduction is from 23.8% to 2.2% by one numerical scheme and from 29.7% to –3.6% by another for a transient problem.

原文???core.languages.en_GB???
頁(從 - 到)1529-1534
頁數6
期刊Water Resources Research
17
發行號5
DOIs
出版狀態已出版 - 10月 1981

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