engineering recuitment TNPSC AE Civil 2024 Test series Fluid Mechanics Open Channel Flow Gradually Varied
Given that g = acceleration due to gravity and R = hydraulic mean depth, the Darcy-Weisbach friction factor ‘f’ is related to Manning’s rugosity coefficient ‘n' as
1
\(\frac{{8g{n^2}}}{{{R^{\frac{1}{3}}}}}\)
2
\(\frac{{g{n^2}}}{{8{R^{\frac{1}{3}}}}}\)
3
\(\frac{{64ng}}{{{R^{\frac{1}{3}}}}}\)
4
\(\frac{{{R^{\frac{1}{3}}}}}{{8g{n^2}}}\)