Enhanced Micromixing of Non-Newtonian Fluids by a Novel Zigzag Punched Impeller

Yang, Juan; Zhang, Qinghua; Mao, Zai‐Sha; Yang, Chao

doi:10.1021/acs.iecr.9b00465

Cited by 13 publications

(12 citation statements)

References 23 publications

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“…Many authors − have investigated the kinetic models of these reactions. In the past 3 years, the kinetic models developed by Guichardon and Falk are still the most widely used models in various mixing devices, including the stirred tank, microchannel reactor, high-speed disperser, rotating packed bed, spinning disc reactor, high-shear mixer, and so on. − To compare conveniently with other mixing devices, we also employ these kinetic models. …”

Section: Experimental Methods and Apparatusmentioning

confidence: 99%

Mixing Performance of an Inline High-Shear Mixer with a Novel Pore-Array Liquid Distributor

Xia

Zhao

et al. 2019

Ind. Eng. Chem. Res.

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A novel pore-array intensified tube-in-tube microchannel (PA) with high throughput was developed to couple with a high-shear mixer (PAHSM) for improving its mixing performance. Effects of structural and operating parameters were intensively investigated with the Villermaux/Dushman system. The results indicated that the mixing performance in PAHSM was significantly impacted by the structural parameters, and it increased with both the rotor speed and flow rate but not with the flow ratio. The micromixing time estimated with the incorporation model could reach 10–4 s. Compared with other mixing devices, the PA liquid distributor can significantly enhance the mixing performance of HSM with high throughput but low pressure drop. An artificial neural network (ANN) was applied to correlate the micromixing time with the investigated parameters, and the comparison between the model and experimental data indicated that it was an efficient method to fit experimental data in the PAHSM.

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Section: Experimental Methods and Apparatusmentioning

confidence: 99%

Mixing Performance of an Inline High-Shear Mixer with a Novel Pore-Array Liquid Distributor

Xia

Zhao

et al. 2019

Ind. Eng. Chem. Res.

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“…The hydrodynamics of solid-liquid suspension process in the stirred tank with a dual rigid impeller, a dual rigid-flexible impeller, and a punched rigid-flexible impeller was numerically simulated by Gu et al, 9 indicating that the punched impeller can produce a series of jet flows in the rotation process, and the jet flows could form a variety of vortices to enhance the turbulence extent of the mixing system. Yang et al 10 developed a novel zigzag punched impeller (ZPI) and found through experiment that the ZPI can not only reduce power consumption but also produce efficient impinging streams to disturb regular circular motion of the fluid, and its mixing outperforms the standard six straight blade turbine and down-pumping pitched blade turbine. Through these investigations, it is found that the reasonable design of the punched impeller can improve the mixing performance of solid-liquid suspension.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation for a punched impeller in a solid-liquid stirred tank based on the EE-KTGF model

Zhang

Zhou

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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The improvement of mixing efficiency in solid-liquid stirred vessel is one of the important challenges in industrial processes. The present study aims at evaluating the performance of the punched impeller. The mixing process in a stirred tank with down pumping pitched blade turbine (PBTD) and down pumping pitched blade punched turbine (PPBTD) was predicted adopting Eulerian-Eulerian method combined with Kinetic Theory of Granular Flow (EE-KTGF). The flow field and solid particles distribution of two impellers were compared in detail through various parameters. It was found that that the PPBTD impeller has positive significance in improving suspension quality and reducing power consumption. Moreover, the effects of aperture diameter, aperture ratio and liquid viscosity on mixing characteristics were discussed. It can be observed that the PPBTD impeller can effectively enhance the mixing degree of liquid with different viscosity. The aperture diameter and aperture ratio have great influence on turbulence parameters, solid particles distribution and power consumption. The better suspension quality can be obtained and power consumption was dramatically decreased by 7.1% when the aperture diameter and aperture ratio are 8 mm and 13%, respectively. These results can be the significant guidance to the design of punched impeller in chemical and biochemical engineering applications.

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“…Zhao et al [17] investigated the effects of blade shape on trailing vortices, indicating that trailing vortices could provide a source of turbulence and have a potential benefit for mixing in a stirred tank. Yang et al [18] developed a novel zigzag punched impeller with promising outcomes. Another alternative is based on cut blade surfaces.…”

Section: Introductionmentioning

confidence: 99%

Study of Novel Punched-Bionic Impellers for High Efficiency and Homogeneity in PCM Mixing and Other Solid-Liquid Stirs

et al. 2021

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Improvement of stirring performance is one of the primary objectives in solid–liquid mixing processes, such as the preparation of phase change materials (PCMs) for energy saving in refrigeration and heat pump systems. In this paper, three novel impellers are proposed: pitched-blade punched turbine (PBPT), bionic cut blade turbine (BCBT) and bionic cut punched blade turbine (BCPBT). An experimental test was conducted to validate the stirring system model based on the Eulerian–Eulerian method with the kinetic theory of granular flow. Then the performance of the novel impellers was predicted, studied, and compared. The outcomes indicate that a novel impeller, specifically BCPBT, can effectively suspend particles and dramatically reduce power consumption. A better solid–liquid suspension quality was obtained with an aperture diameter of 8 mm and aperture ratio of 13%. Within the range of impeller speeds and liquid viscosity studied in this this paper, higher impeller speeds and more viscous liquids are more conducive to particle dispersion. One of the most important contributions of this work lies in the design of novel impellers, an extent of energy conservation to 17% and efficient mixing was achieved. These results have reference significance for improving the energy efficiency of temperature regulation systems.

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Enhanced Micromixing of Non-Newtonian Fluids by a Novel Zigzag Punched Impeller

Cited by 13 publications

References 23 publications

Mixing Performance of an Inline High-Shear Mixer with a Novel Pore-Array Liquid Distributor

Mixing Performance of an Inline High-Shear Mixer with a Novel Pore-Array Liquid Distributor

Numerical simulation for a punched impeller in a solid-liquid stirred tank based on the EE-KTGF model

Study of Novel Punched-Bionic Impellers for High Efficiency and Homogeneity in PCM Mixing and Other Solid-Liquid Stirs

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