Open channel flow is a sort of generalize for water flow phenomenon, which water stream with free surface be leashed by solid boundary with finity scale.

明渠水流是对具有自由表面的水流在有限尺度的固体边界约束下流动现象的一种概化。

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Then basing on the free-vortex equation, potential equation and stream function of flow are achieved by mathematical analyze, and solving these equations gives flow fields.

从自由涡运动方程出发，推导出管内流场的势函数和流函数方程，获得了管内流场的数学分析解；

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My innermost feelings are the free flow mountain stream, never stops to front !

我的内心是自由流淌的溪水，汩汩向前永远不停。

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