摘要
运用Galerkin特征有限元法,建立了以为因变量的一维非饱和土壤水分运动Richards模型的特征有限元数值模型,得出了近似解最优阶2的误差估计.通过数值模拟,并与用一般有限元方法计算的结果进行比较.结果表明,此方法计算精度更高,更符合实际工作要求.
The Galerkin characteristic finite element method is applied to set up the numerical model of 1-D water flow in unsaturated soils with θ as variable, and the optimal error estimates is obtained. The result of numerical simulation is compared with the result of normal finite element method. It demonstrates that the method is more suitable for the demand of practical work because of its higher precision.
出处
《江汉大学学报（自然科学版）》
2007年第1期11-14,共4页
Journal of Jianghan University：Natural Science Edition
关键词
土壤水分运动
特征有限元法
误差估计
数值模拟
soils water flow
characteristic finite element method
error estimate
numerical simulation
