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Effect of Impeller Design on Power Characteristics and Newtonian Fluids Mixing Efficiency in a Mechanically Agitated Vessel at Low Reynolds Numbers

Author

Listed:
  • Marek Jaszczur

    (Faculty of Energy and Fuels, AGH University of Science and Technology, 30059 Krakow, Poland)

  • Anna Młynarczykowska

    (Faculty Mining and Geoengineering, AGH University of Science and Technology, 30059 Krakow, Poland)

  • Luana Demurtas

    (Department of Ingegneria Civile, Ambientale e Architettura, University of Cagliari, 09123 Calgari, Italy)

Abstract

The mixing process is a widespread phenomenon, which plays an essential role among a large number of industrial processes. The effectiveness of mixing depends on the state of mixed phases, temperature, viscosity and density of liquids, mutual solubility of mixed fluids, type of stirrer, and, what is the most critical property, the shape of the impeller. In the present research, the objective was to investigate the Newtonian fluids flow motion as well as all essential parameters for the mechanically agitated vessel with a new impeller type. The velocity field, the power number, and the pumping capacity values were determined using computer simulation and experimental measurements. The basis for the assessment of the intensity degree and the efficiency of mixing had to do with the analysis of the distribution of velocity vectors and the power number. An experimental and numerical study was carried out for various stirred process parameters and for fluids whose viscosity ranged from low to very high in order to determine optimal conditions for the mixing process.

Suggested Citation

  • Marek Jaszczur & Anna Młynarczykowska & Luana Demurtas, 2020. "Effect of Impeller Design on Power Characteristics and Newtonian Fluids Mixing Efficiency in a Mechanically Agitated Vessel at Low Reynolds Numbers," Energies, MDPI, vol. 13(3), pages 1-19, February.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:3:p:640-:d:315897
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    Citations

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    Cited by:

    1. Magdalena Piasecka & Beata Maciejewska & Paweł Łabędzki, 2020. "Heat Transfer Coefficient Determination during FC-72 Flow in a Minichannel Heat Sink Using the Trefftz Functions and ADINA Software," Energies, MDPI, vol. 13(24), pages 1-25, December.
    2. Sangare, Diakaridia & Bostyn, Stéphane & Moscosa-Santillan, Mario & Gökalp, Iskender, 2021. "Hydrodynamics, heat transfer and kinetics reaction of CFD modeling of a batch stirred reactor under hydrothermal carbonization conditions," Energy, Elsevier, vol. 219(C).
    3. Magdalena Piasecka & Sylwia Hożejowska & Beata Maciejewska & Anna Pawińska, 2021. "Time-Dependent Heat Transfer Calculations with Trefftz and Picard Methods for Flow Boiling in a Mini-Channel Heat Sink," Energies, MDPI, vol. 14(7), pages 1-24, March.

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