The tank shown below receives a continuous flow of 200 L/min of glycerol at 20 oC ( = 1260 kg/m3 , = 888 cP) for a reaction to take place. The product effluent (i.e., leaving the tank)should be delivered to another tank below at the same volumetric flow rate. You propose to use gravity, as shown below, using a 10 m long galvanized iron pipe and controlling the flow with a globe valve. However, you must size the exit pipe, considering friction losses in the pipe and at the globe valve, 900 elbow, and pipe entrance (L/D = 15). What is the optimal exit pipe inner diameter (in cm) to maintain an exit flow of 200 L/min? (13 pts)

Galvanized Iron, D= ? Open Globe Valve