A turbine with six blades disk of 0.6 m in diameter is mounted centrally in a baffled tank for a juice preparation process. This agitated vessel is being filled to depth of 2 m with an aqueous solution of 30% tomato juice concentrate at 20 C which has a viscosity and density of 1.5 x 102 Pas and 1030 kg/m respectively. a) Determine the suitable power required for the impeller if it is required to keep the impeller rotation speed at 85 rpm. (5 marks) b) The same agitated vessel is used to mix 60% tomato paste mixture having a viscosity and density of 150 Pa s and 1010kg/m respectively. By applying the same impeller speed as in a), determine the power required for this system, (3 marks) c) Comment on the suitability of existing agitated vessel design for the fluid considered in part b) (4 marks) Table B Values of constants and K, for baffled tanks Type of Impleller Propeller, three blade Pitch 1.0 Pitch 1.5 41 0.32 0.87 48 5.75 Turbine Six-blade disk Six pitched blades Four pitched blades 1.63 1.27 44.5 1.70 Flat paddle, two blades Helical ribbon Anchor 36.5 52 300 0.35