CFD Assessment of the Hydrodynamic Performance of Two Impellers for a Baffled Stirred Reactor

When converting a baffled stirred reactor to work with different fluid, usually the original impeller must be replaced customized one. If was designed for mixing liquids, its performance liquid–solid suspensions may not satisfactory. A case study is presented, where two-blade new three-blade design. The shows clear improvements in suspension, while keeping shaft power practically at same level. As result, homogenous mixture obtained, thus ensuring required quality of final product. present numerical investigations employ Eulerian multiphase model renormalization (RNG) k–ε turbulence simulate three-dimensional unsteady free-surface flow tank. sliding mesh approach used account rotation within expert code, FLUENT 16. comparative quantitative analysis solid phase distribution and relevant velocity profiles show that design three-blade-impeller significantly increasing sedimentation time beyond chemical reaction specific time. necessary drive has slightly higher value than but it can sustained by existing driving system.