Heat transfer and power consumption of Newtonian and non-Newtonian liquids in stirred tanks with vertical tube baffles

•The transient method was used to calculate the convection coefficient.•Nusselt equations in a Reynolds range between 10 and 500,000 have been proposed.•The effect of the impeller type on heat transfer was evaluated.•ower consumed by mechanical impellers has been evaluated graphically.•Applied study for engineers working in various segments of the industrial area.