明渠流 meaning in English

open channel flow
open-channel flow

Velocity profile of open - channel flows in the transitional roughness region on mobile beds
过渡区动床明渠流的流速分布
In pattern , the concentration rises from the surface to the bottom ( in open channel flows ) . as for
型是指浓度从水面到底壁呈上小下大（明渠流）。
And the relation between these velocity was analyzed at last . this is the conclusion : ( 1 ) the distribution of the velocity and concentration are get in the open channel flow and as the sewage flow is gravity flow , the equations is fit for this too . ( 2 ) generally speaking , the self - cleaning velocity should be the starting velocity , and it could fit for the self - cleaning target in limited sense theoretically , but when facing some higher requirement , it is not large enough
最后结合污水流动的最小设计流速与颗粒起动流速、临界不淤流速的关系进行了分析,结论如下: ( 1 )文中所得出的速度分布与浓度分布是在明渠两相流动情况下推得的,由于污水管道流动多为重力流,是明渠流中的一种,所以文中的分析在认识污水流动特性方面具有一定的参考价值。