数值耗散 [流] numerical dissipation
- 得出该格式的数值耗散为二阶,数值频散为三阶。
It is found that the numerical dissipation is second order and the numerical dispersion is third order. - 为减少尾迹数值耗散和便于添加上述边界条件,采用了嵌套网格方法。
Embedded grids are adopted to weaken the numerical diffusion of the wake and to apply the above boundary conditions. - 数值试验表明, 改进后的欧拉-拉格朗日方法在水深变化剧烈处比改进前的数值耗散更小、精度更高和表现更合理。
Compared with the original ELM, the numerical experiments show that the improved ELM has lower numerical dissipation, higher accuracy, and better performance over steep topography.