摘要
在求解对流占优的地下水溶质运移问题时，常规数值方法会产生数值扩散和过量现象．本文将混合拉普拉斯变换有限单元法引入求解二维对流扩散问题，结果表明，这种新的计算方法能有效地消除数值扩散和过量现象，同时由于具有一步到位、局部求解的优点。
In this paper, the hybrid Laplace transform finite element method proposed by Chen H.T.et al in the field of heat transfer is expanded to solve two dimensional convection and dispersion problems. The computational results show that this new method can overcome the artificial diffusion and overshoot effectively. Since no time step is used, the present method can calculate the specific node concentration at any specific time. The new algorithm is suitable for predicting the long term contamination of ground water in large field domain.
出处
《水利学报》
EI
CSCD
北大核心
1997年第4期17-25,共9页
Journal of Hydraulic Engineering
关键词
混合法
拉普拉斯变换
有限单元
溶质运移
地下水
hybrid method, Laplace transform, numerical inversion, finite element, ground water. solute transport.
