الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The current work aims to study experimentally the effect of the corrugated surface which acts as a turbulence promoter on the mass and heat transfer rate at the wall of a stirred tank reactor of square cross section where diffusion of liquid-solid is the controlled step. The mass transfer coefficient was determined by the electrochemical technique. The effect of impeller rotation speed, impeller geometry (axial/radial flow turbine), the orientation of the corrugated surface (horizontal/vertical), and peak to valley height, on the rate of mass transfer was investigated. Via dimensionless analysis, the studied parameters were correlated to the mass transfer coefficient. Different ranges of Schmidt number (1577 < Sc < 3591) and Reynolds number (1338 < Re < 17762) were used to fit the data. The maximum deviation between the correlations and the experimental data was ±7% in all considered cases. The results show that the increase of peak to valley value decreases the mass transfer rate. On the contrary, the mass transfer rate increases with the increase of the impeller rotational speed. For a given set of conditions, it was found that the radial flow configuration of turbine promotes mass transfer relative to axial flow configuration.