It analyses the relation by Newton's iteration method, which shows the select of the time step has a relation with the mesh size and dispersion error.
利用牛顿迭代法对其进行了全面的分析，发现了时间步长的选取与网格、色散误差的大小有一定的联系。
Click on the path to add the mesh, then select the white arrow tool, and select the end point.
在路径上单击添加网格，然后选择白箭头工具，选择结束点。
Then select the cross points of the two Mesh Paths with the White Arrow Tool.
然后使用白箭头工具选择2个混合路径的交叉点。
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