Abstract
Power consumption of large paddle impellers was measured for shear thinning fluids. The large paddle impellers are MAXBLEND, FULLZONE, Super Mix MR203 and Super Mix MR205. The test fluids were 3.5wt%, 4.0wt%, 4.5wt% carboxymethylcellulose(CMC) solutions. The shear stress of CMC solutions was correlated with the power law model. The correlation of power consumption was conducted by the use of Metzner-Otto method. As a result, this method was valid for estimating power consumption of large paddle impeller. The Metzner-Otto constant increased with increasing the impeller diameter.
