摘要
青海察尔汗盐湖是我国第一大规模开发的钾盐基地,该文主要是对察尔汗盐湖首采区关于提取卤水的二维动态模型进行求解研究——将混合拉普拉斯变换有限单元法引入到求解首采区卤水动态二维模型中溶质运移的问题中。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,而此方法能够有限地消除数值扩散和过量的现象,还具有一步到位、局部求解的优点。还将此方法应用到具有空间一阶导数项的对流弥散方程,以检验算法的数值有效性和求解溶质运移模型的能力。
ChaErHan is the largest scal producing KCL salt lake. In the paper,the major task is to study the al-gorthm of 2 - D model,that is the application of HLTFEM. The hybrid Laplace transform finite element method is expanded to solve two - dimensional covection and dispersion problem - s. Since no time step is used ,the method can calculate the specific node concentration at any specific time. The test results show that this new method can overcome the artifical diffusion and overshoot effectively.
出处
《计算机仿真》
CSCD
2005年第6期75-78,共4页
Computer Simulation
关键词
弥散系数
拉普拉斯变换
数值反演
有限单元
对流
Dispersal coefficient
Laplace transform
Numerical inversion
Finite elment
Solute transport
