剖面二维悬移质泥沙输移方程的分步解法

Fractional steps method for solving vertical 2-D suspended sediment transport equation

利用空间概念上的分步法 ,对剖面二维悬移质泥沙输移方程 ,提出两种不同的计算格式。通过比较分析后认为 :在对流项较弱时 ,可采用隐格式计算 ;在对流项占优时 ,为消除解的振荡 ,应采用显隐混合格式。另外 。

The method of fractional steps is used to split vertical 2 D suspended sediment transport equation. Then two different computation schemes are presented. Through comparison and analysis, it is suggested that: as the advection term is poor, the implicit scheme is proper; as the advection term is preponderant, the implicit explicit hybrid scheme is very reasonable. Experimental results are used to verify two computation schemes, and good agreements are obtained.