Question: Equation 10.41 for the discharge coefficient is for free (nearly frictionless) outflow. If the outlet is drowned, as in Fig. 10.10c, there is dissipation and

Equation 10.41 for the discharge coefficient is for free (nearly frictionless) outflow. If the outlet is drowned, as in Fig. 10.10c, there is dissipation and Cd drops sharply. Fig. P10.77 at right shows data from Ref. 3 on drowned vertical sluice gates. Use this chart to repeat Prob. 10.73, and plot the estimated flow rate versus y2 in the range 0
Equation 10.41 for the discharge

0.6 Free outflow 0.5 0.4 G,0.3 Drowned tailwater Fig. 10.10 0.2 0.1 = 2 3 45 678 0 2 4 68 10 12 14 16

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