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Science in China Series D: Earth Sciences

, Volume 41, Issue 4, pp 429–436 | Cite as

Numerical simulation of an unsaturated flow equation

  • Zhenghui Xie
  • Qingcun Zeng
  • Yongjiu Dai
  • Bin Wang
Article

Abstract

A numerical model for an unsaturated flow problem by using the finite element method is established in order to simulate liquid moisture flow In an unsaturated zone with homogeneous soil and deep subsurface water, and with different initial and boundary conditions. For infiltration or evaporation problems, a traditional method usually yields oscillatory non-physics profiles. However, nonoscillatory solutions are obtained and non-physics solutions for these problems are evaded by using the mass-lumped finite element method. Moreover, the kind of boundary condition is handled very well.

Keywords

unsaturated flow finite element mass lumping numerical simulation 

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Copyright information

© Science in China Press 1998

Authors and Affiliations

  • Zhenghui Xie
    • 1
  • Qingcun Zeng
    • 1
  • Yongjiu Dai
    • 1
  • Bin Wang
    • 1
  1. 1.LASGInstitute of Atmospheric Physics, Chinese Academy of SciencesBeijingChina

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