A Study of Mixing Structure in Stirred Tanks Equipped with Multiple Four-Blade Rushton Impellers

Abstract

The effect of multiple Rushton impellers configurations on hydrodynamics and mixing performance in a stirred tank has been investigated. Three configurations defined by one, two and three Rushton impellers are compared. Results issued from our computational fluid dynamics (CFD) code are presented here concerning fields of velocity components and viscous dissipation rate. These results confirm that the multi-impellers systems are necessary to decrease the weaken zones in each stirred tanks. The experimental results developed in this work are compared with our numerical results. The good agreement validates the numerical method.

Numerical investigation of hydrodynamic behavior of shear thinning fluids in stirred tank

“…They determined the entropy generation rate using the velocity gradients. Driss et al [31] compared the experimental data with the CFD simulated results of a stirred tank reactor to show the effect of multiple (one, two and three) Rushton turbine configurations on the mixing performance.…”

“…For isothermal flows, the entropy generation consists of only viscous dissipation of fluid. Many researchers studied the rate of entropy generation experimentally and numerically in a various system with or without heat transfer process [24][25][26][27][28][29][30][31]. But only a few works on entropy generation in stirred tanks are available in the literature.…”

PIV Measurements to Study the Effect of the Reynolds Number on the Hydrodynamic Structure in a Baffled Vessel Stirred by a Rushton Turbine

“…Stirring vessels are devices that find extensive applications particularly in chemical, food and biological process industries. Nowadays, numerical simulations are completed with experimental study to construct a better knowledge about the flow characteristics in a stirred vessel [1][2][3][4][5][6][7][8]. Various methods and techniques may be employed when achieving experimental study.…”

THE PERFORMANCE OF EXTRACTION EQUIPMENT MODIFICATION TOWARD SIZE <br> PARTICLE OF TUBER AND YIELD OF INULIN OF DAHLIA FLOWER TUBER

“…Loose, different types of impeller will produce different material flow patterns so that contact between the material and the stirring knife can occur (Thangaraj et al, 2006). In addition, the number of mixer blades used will also produce different flow patterns (Driss et al, 2012). The turbine stirrer will produce axial and radial flow patterns at once.…”