对流过程采用逆风-中心差分格式求解；
The first is a convective problem, and solved by the central-upwind deference scheme;
对流项用迎风—中心差分格式模拟，压力方程用SOR法迭代求解。
The convection term is discretized with upwind-central difference scheme, while the pressure equation is solved by SOR.
研究还发现振荡流场长期输运作用数值模拟适用迎风差分格式，而不适用中心差分格式。
In addition, this study has discovered that the up-wind differencing but not the central differencing is fit to simulate the long-term transport of the oscillatory current.
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