Investigation on the Flow Field and Mixing Efficiency of a Stirred Tank Equipped with Improved Intermig Impellers
-
Yongjun Zhou
,
Weizhen Lin
Abstract
The flow field in a transparent stirred tank with a diameter of D = 0.42 m equipped with dual-layer improved Intermig impellers was numerically investigated using a multi-reference frame method based on the computational fluid dynamics (CFD) simulation code: Fluent. The simulation results were validated by experiments based on a stirred tank testing platform and a Particle Image Velocimetry (PIV) testing instrument. The effects on the flow field arising from the diameter of impellers, the installation height of impellers (C1), the rotational speed as well as the distance between two impellers (C2) were investigated. It was revealed that the distance between two impellers and the installation height has obvious influences on the local flow field around impellers. Appropriately increasing the two parameters can enhance the axial flow and achieve a better mass transfer effect. For the tank model rescaled for experiments, the optimized geometrical parameters are C1 = 0.36D and C2 = 0.49D that can result in full occupation of large eddies in the entire volume. The mixing process simulation indicates that the mixing efficiency is the best in the region near the impellers while it is the worst in the bottom of the tank. An appropriate increase in the diameter of the lower impellers and a reduction in the distance from the lower impellers to the tank bottom can improve the mixing efficiency in the central region near the tank bottom.
Acknowledgements
This project was supported by the National Natural Science Foundation of China (51775262), the Natural Science Foundation of Jiangsu Province of China (BK20161546), the Natural Science Foundation for Colleges and Universities in Jiangsu Province of China (16KJA470001), and the Project of Jiangsu provincial Six Talent Peaks (ZBZZ-014).
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Artikel in diesem Heft
- Review
- Simulation of Particle Mixing and Separation in Multi-Component Fluidized Bed Using Eulerian-Eulerian Method: A Review
- Articles
- Acidic Functionalized Nanobohemite: An Active Catalyst for Methyl Ester Production
- Investigation on the Flow Field and Mixing Efficiency of a Stirred Tank Equipped with Improved Intermig Impellers
- Modeling and Testing of a Milli-Structured Reactor for Carbon Dioxide Methanation
- Catalytic Steam Gasification of Glucose for Hydrogen Production Using Stable Based Ni on a γ–Alumina Fluidizable Catalyst
- PIV Measurement and CFD Simulation of Liquid-Liquid Mixing in Mixer Settler with Rigid-Flexible Impeller
- Catalytic Synthesis of Monoglycerides by Glycerolysis of Triglycerides
- Exergy and Energy Analysis of Coal Gasification in Supercritical Water with External Recycle System
- CFD Study on the Flow Field and Power Characteristics in a Rushton Turbine Stirred Tank in Laminar Regime
- Numerical Simulation of Flow Distribution in the Reactor Used for CFRPs Degradation under Supercritical Condition
- Short Communication
- Rebuttal To: “On the Understanding of the Adsorption of 2-Phenylethanol on Polyurethane-Keratin Based Membranes” by Cordero-Soto et al. (Int. J. Chem. React. Eng. 2017, 15 (5), Article Number: 20170103)
