Study on mixing characteristics of viscoplastic fluid in a rigid-flexible impeller stirred tank
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Deyin Gu
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Yinghua Song
Abstract
The rigid-flexible impeller (RF impeller) was used in the mixing process of viscoplastic fluid, and the mixing performance of RF impeller was explored by using numerical simulation and experimental analysis. Results indicated that RF impeller could reduce the power consumption (P) and demonstrate the advantage of energy-saving compared with Rushton turbine (RT). RF impeller demonstrated a more pronounced force coupling effect between the impeller and surrounding fluid, and exhibited superior adaptability in the flow field compared with RT. Meanwhile, the utilization of RF impeller can effectively enhance the expansion of high velocity region, expand the cavern zone, and decrease the mixing efficiency number while maintaining constant P compared with RT, and the size of high velocity region and cavern zone could be increased with an increase in impeller speed. Moreover, the cavern structure was obtained through the visualization experiment, and the results were similar to that in the simulation. The findings suggested that incorporating rigid-flexible combination structure design of impeller blades could effectively expand the cavern zone, reduce the stagnant zone, and enhance the mixing efficiency in the viscoplastic fluid mixing process.
Funding source: National Natural Science Foundation Project of China
Award Identifier / Grant number: 22208037
Award Identifier / Grant number: (KJQN202200805)
Funding source: Chongqing Technology and Business University
Award Identifier / Grant number: (S202311799023)
Funding source: Natural Science Foundation Project of Chongqing
Award Identifier / Grant number: (CSTB2022NSCQ-MSX0400)
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Research ethics: Not applicable.
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Informed consent: Not applicable.
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Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Competing interests: The author(s) state no conflict of interest.
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Research funding: The study was supported by the National Natural Science Foundation Project of China (22208037), Natural Science Foundation Project of Chongqing (CSTB2022NSCQ-MSX0400), Science and Technology Research Program of Chongqing Municipal Education Commission (KJQN202200805), Chongqing Technology and Business University college students innovation and entrepreneurship training program (S202311799023).
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Data availability: Not applicable.
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Articles in the same Issue
- Frontmatter
- Articles
- Study on mixing characteristics of viscoplastic fluid in a rigid-flexible impeller stirred tank
- Emission and performance investigation of mango seed oil biodiesel supplied with n-pentanol and n-hexanol additives and optimization of fuel blends using modified deep neural network
- Study of chlorophyll dye from peppermint (mentha spicata) used as a sensitizer in TiO2 solar cells
- Dry reforming of methane over Ni–Mg–Al and Ni–Ca–Al type hydrotalcite-like catalysts: effects of synthesis route and Ru incorporation
- CFD-DEM simulation of chemical looping hydrogen generation in a moving bed reactor
- Conceptual design of a fixed bed N2O decomposition reactor with a heat pipe heat exchanger
- Investigation of polymers pyrolysis in a solid-gas conical spouted bed: CFD simulation
- CFD simulation study of internal mixing and flow of a modified airlift bioreactor
- Mechanism analysis and mixing characterization of variable-speed mechanical mixing enhancement
- Enhanced sonocatalytic degradation of Acid Red 27 with Fe2O3 catalyst: a kinetic study
