125) (a) A 4.8 m cylindrical tank with a flat bottom is to be converted into an agitation tank with a flat blade turbine agitator with six blades, determine the diameter of the tank (D.) (state and justify your assumption to determine (D.). Given that the turbine diameter (Da) is 0.61m and the width (W) is 0.122m. The tank is to contain four baffles, each having a width Jof 0.15m. The turbine is operated at 90rpm and the liquid in the tank has a viscosity 12cp and a density of 929kg/m". Calculate the required (power) kW of the mixer. (15) 2.3 AND 100 60 40 20 10 6 4 5 4 2 Np 1 0.6 0.4 0.2 0.1 10 2 4 10224 4 1032 4 104 2 + 10% DNP N're Figure Above: Power correlations for various impellers and baffles Curve 1. Flat six-blade turbine with disk:D./W = 5; four baffles each D/J = 12. Curve 2. Flat six-blade open turbine (D/W = 8; four baffles each D./J = 12. Curve 3. Six-blade open turbine (pitched-blade) but blades at 45"; D./W = 8; four baffles each D/J = 12. Curve 4. Propeller, pitch = 2D.; four baffles each D./J = 10; also holds for same propeller in angular off-center position with no baffles. Curve 5. Propeller; pitch = D.; four baffles each D./J = 10; also holds for same propeller in angular off-center position with no baffles. Curve 6. High-efficiency impeller; four baffles each D/J = 12