Application of the electrochemical method for the specification of flow and heat transfer in non-Newtonian media

In the study the electrochemical results of the friction factor in boundary layer and heat transfer distribution coefficient in non-Newtonian liquid agitated by different impellers, have been presented. It has been established that for studies on hydrodynamics in boundary layer and evaluation of local values of friction factor and heat transfer coefficient in Na-CMC and guar gum aqueous solutions by the electrochemical method the following solution of 0.005 kmol/m3 K3[Fe(CN)6], 0.005 kmol/m3 K4[Fe(CN)6] and 0.3 kmol/m3 K2SO4 can be recommended. The common relationship {for a given type of an impeller) between local values of friction coefficient and heat transfer coefficient and Reynolds number proposed by Metzner & Otto (1957) for Newtonian and non-Newtonian fluids have been obtained. The greatest mean values of both coefficients have been obtained for Rushton turbine whereas the lowest values occurred for paddle with 6 pitched blade of the angles of 135st.