numerical diffusion

基本解释

Embedded grids are adopted to weaken the numerical diffusion of the wake and to apply the above boundary conditions.
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。
To reduce the influence of the numerical diffusion on the computational results, such as decreasing the grid size has been used.
给出了分离器内速度矢量图，为减小数值伪扩散对强旋流动的影响，采用了减少网络尺寸等措施。
Standard numerical methods solving these equations often produce nonphysical oscillations, and upwind methods usually cause excessive numerical diffusion which smear the sharp fronts.
求解一般抛物方程所采用的标准有限元或有限差分法会产生难以接受的数值震荡和数值弥散；