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Analysis and Simulation of the Motion of Particles near the Heat Exchange Surface Immersed in a Fluidized Bed

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Abstract

The immersion of a heat exchanger into a fluidized bed changes the hydrodynamic structure of the bed, which, according to this study, has a decisive influence on the heat transfer process. A near-surface zone with a local vertical circulation of particles and a porosity that is higher than that in the rest of the bed volume is formed near the immersed body with an increase in the velocity of the gas blown through the bed. As is shown in this study, the deterioration of the exchange of particles between this zone and the rest of the bed volume leads to a decrease in the intensity of external heat transfer with an increase in the gas velocity. A model is proposed that makes it possible to calculate the width of the near-surface zone and the time of residence of fluidized bed particles in it.

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Funding

This work was supported by the Russian Foundation for Basic Research within project no. 19-58-04004.

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Authors and Affiliations

  1. Tambov State Technical University, Tambov, Russia

    O. Yu. Milovanov, R. L. Is’emin, D. V. Klimov & V. S. Kokh-Tatarenko

  2. Joint Institute of High Temperatures, Russian Academy of Sciences, Moscow, Russia

    O. M. Larina

Authors
  1. O. Yu. Milovanov
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  2. R. L. Is’emin
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  3. D. V. Klimov
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  4. V. S. Kokh-Tatarenko
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Correspondence to O. Yu. Milovanov.

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Translated by O. Kadkin

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Milovanov, O.Y., Is’emin, R.L., Klimov, D.V. et al. Analysis and Simulation of the Motion of Particles near the Heat Exchange Surface Immersed in a Fluidized Bed. Theor Found Chem Eng 55, 41–52 (2021). https://doi.org/10.1134/S0040579520060172

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