A water tank of constant depth H, open to the atmosphere, is connected to the piping system, as shown in Figure P8.45. After a length of pipe L of diameter D, the diameter decreases smoothly to a value of D/2 and then continues on for another length L before exiting to atmosphere. The flow is turbulent and the friction factor f is the same for all piping. CD1 and CD2 are the loss coefficients for the entry and exit. Calculate the depth of the tank required to produce a mean exit velocity of V .

A water tank of constant depth H, open to the atmosphere, is connected to the piping system, as shown in Figure P8.45. After a length of pipe L of diameter D, the diameter decreases smoothly to a value of D/2 and then continues on for another length L before exiting to atmosphere. The flow is turbulent and the friction factor f is the same for all piping. CD1 and CD2 are the loss coefficients for the entry and exit. Calculate the depth of the tank required to produce a mean exit velocity of V .