EXERCISE $3$

A pipe connects two tanks A and $B,$ the distance of the liquid levels in the two tanks is $Y=6m$ the length and diameter of the pipe are, respectively, $L=18m,D=80mm.$ A valve suitable at regulating the flowrate is located in correspondence of the half of its length. Calculate the flow rate in the system assuming a loss coefficient of the valve $K=4$ and the flow regime to be fully turbulent anol the relaitve roughvess of the hive $=0\mathrm{.}5.$ With the recovered value, check the validity of the hypothesis on the flow regime.