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laibin-wang

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[求助] 求助!y+计算中ref.length代表什么?

用这个网页(http://geolab.larc.nasa.gov/APPS/YPlus/)中的公式估算y+,其中有个ref.length代表什么意思?还有哪位大神能否帮我估计一下,明渠,水深0.15m,水槽宽0.456m,水流速度0.25m/s,y+大概多少合理?还有我发现我自己算的Re数给一位师兄的论文中的不一样,我算的是22461,他算的是12715,难道是水力半径,求指导?小白送金币
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