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最近看到的一种轴对称模型,采用中心差分处理,把下式45式代入42式,不就需要t - 2δt,请问这种情况应该怎么处理呢??
其中,
OpenFOAM中可以用U.oldTime()获取
@东岳 那请问东岳老师,在t=0,和t=1时刻,这个函数返回的值是什么意义呢?