计算物理 ›› 1996, Vol. 13 ›› Issue (2): 201-206.

• 论文 • 上一篇    下一篇

改进特征有限元法求解高度非线性的海水入侵问题

吴吉春, 薛禹群, 谢春红, 张志辉   

  1. 南京大学地球科学系、数学系, 南京 210093
  • 收稿日期:1994-12-06 出版日期:1996-06-25 发布日期:1996-06-25
  • 基金资助:
    本文工作得到国家自然科学基金资助

IMPROVED CHARACTERISTIC FINITE ELEMENT METHOD IN SOLVING HIGHLY NONLINEAR SEA WATER INTRUSION PROBLEM

Wu Jichun, Xue Yuqun, Xie Chunhong, Zhang Zhihui   

  1. Dept. of Earth Sciences and Dept. of Mathematics, Nanjing University, Nanjing 210093
  • Received:1994-12-06 Online:1996-06-25 Published:1996-06-25

摘要: 提出用改进特征有限元法来求解高度非线性的海水入侵问题,以克服在求解这一问题时碰到的数值弥散和振荡困难。所求解的三维海水入侵数学模型以交换阳离子Na+、Ca2+作为模拟因子,考虑了水-岩间的阳离子交换作用。将模型计算结果与观测结果进行了对比验证。

关键词: 改进特征有限元法, 海水入侵, 阳离子交换, 数值模拟

Abstract: In order to surmount the difficulty of numerical dispersion and numerical oscillation an improved characteristic finite element method is presented to solve the highly nonlinear sea water intrusion problem.The solved three-dimensional mathematical model,which regards exchanging cations Na+ and Ca2+ as simulation factor,takes account of cation exchange reaction between water and rock.The simulated results are satisfactory by comparison with the field data,and show that this model can be applied to predict the movement and evolution of exchanging cations during sea water intrusion.

Key words: Improved characteristic finite element method, Sea water intrusion, Cation exchange, Numerical simulation

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