Calculate the diameter D of a settling tank to separate light oil from water. The oil is the dispersed phase. Oil mass flow rate Qoil = 900 kg/h, oil = 800 kg/m3, oil = 0.003 Pa.s. Water mass flow rate Qwater =5050 kg/h, water = 1000 kg/m3, water = 0.001 Pa.s. The droplet diameter dp = 200 m