Question 2 An Ice cream production plant in Pretoria is mixing a ton of brown sugar in a warm 1.1 m of water. They are using a flat-blade turbine agitator with a disk having six blades installed in the mixing tank (blender). The turbine diameter D. is 85 cm and the blender Db diameter is twice the turbine diameter. Db = H, and the width W is 0.5 m. The blender contains four baffles, each having a width J of 20 cm. The turbine is operated at 90 rpm and the solution in the tank has a viscosity of 0.012 Pa.s, assuming a perfect mixing. Determine the energy required to operate the mixing unit in a day. (15)

Question 2 An Ice cream production plant in Pretoria is mixing a ton of brown sugar in a warm 1.1m3 of water. They are using a flat-blade turbine agitator with a disk having six blades installed in the mixing tank (blender). The turbine diameter Da is 85cm and the blender Db diameter is twice the turbine diameter. Db=H, and the width W is 0.5m. The blender contains four baffles, each having a width J of 20cm. The turbine is operated at 90rpm and the solution in the tank has a viscosity of 0.012 Pa.s. assuming a perfect mixing. Determine the energy required to operate the mixing unit in a day