Using the 2-K Method

4-12. A tank with a drain pipe is shown in Figure 4-12. The tank contains crude oil and there is concern that the drain pipe might shear off below the tank, allowing the tank contents to leak out. a. If the drain pipe shears 2 meters below the tank, and the oil level is 7 m at the time, estimate the initial mass flow rate of material out of the drain pipe. b. If the pipe shears off at the tank bottom, leaving a 50-mm hole, estimate the initial mass flow rate. The crude oil has a density of 928 kg/m and a viscosity of 0.004 kg/m s. 10m 7 m 2m kepal 50mm ID Pipe Figure 4-12: Tank draining process for Problem 4-12