In the same conditions, the numerical dispersion will worsen when the grid becomes bigger or difference accuracy becomes lower.

在相同的条件下，剖分步长越大及差分精度越低，数值频散现象越明显。

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The changes of longitudinal dispersivity with the grid sizes were mainly caused by numerical dispersion.

网格抛分使模拟计算的纵向弥散度变化的主要原因是数值弥散。

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First, constructed high order staggered-grid difference formulas, and discussed the stability and numerical dispersion of staggered grid method.

首先，构建高阶交错网格差分公式，讨论了交错网格法的稳定性与数值频散。

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First, constructed high order staggered-grid difference formulas, and discussed the stability and numerical dispersion of staggered grid method.

首先，构建高阶交错网格差分公式，讨论了交错网格法的稳定性与数值频散。

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