Particle mixing rates using the two-fluid model

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

In this work, a new methodology is introduced to calculate the solids mixing rate in dense gas-fluidized beds using the two-fluid model. The implementation of this methodology into an existing two-fluid model code was carefully verified. The solids phase continuity equation was satisfied using our method, and the sensitivity of the computational results to the time step, computational cell size, and discretization scheme was investigated to determine the optimal simulation settings. Using these simulation settings, the degree of solids mixing was observed to rapidly (exponentially) increase with increasing operating pressure and linearly decrease with increasing bed diameter. Our novel methodology can be applied to analyze mixing processes in large lab-scale beds as an alternative to existing time-consuming simulation techniques such as computational fluid dynamics combined with the discrete element model.

Original languageEnglish
Pages (from-to)13-26
JournalParticuology
Volume36
Early online date20 Jun 2017
DOIs
Publication statusPublished - 1 Feb 2018

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two fluid models
beds
methodology
Fluids
simulation
continuity equation
computational fluid dynamics
Fluidized beds
solid phases
Computational fluid dynamics
Gases
sensitivity
cells
gases

Keywords

  • Gas-solid fluidized bed
  • Pressure
  • Scale up
  • Simulation
  • Solids mixing
  • Two-fluid model

Cite this

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title = "Particle mixing rates using the two-fluid model",
abstract = "In this work, a new methodology is introduced to calculate the solids mixing rate in dense gas-fluidized beds using the two-fluid model. The implementation of this methodology into an existing two-fluid model code was carefully verified. The solids phase continuity equation was satisfied using our method, and the sensitivity of the computational results to the time step, computational cell size, and discretization scheme was investigated to determine the optimal simulation settings. Using these simulation settings, the degree of solids mixing was observed to rapidly (exponentially) increase with increasing operating pressure and linearly decrease with increasing bed diameter. Our novel methodology can be applied to analyze mixing processes in large lab-scale beds as an alternative to existing time-consuming simulation techniques such as computational fluid dynamics combined with the discrete element model.",
keywords = "Gas-solid fluidized bed, Pressure, Scale up, Simulation, Solids mixing, Two-fluid model",
author = "M. Banaei and N.G. Deen and {van Sint Annaland}, M. and J.A.M. Kuipers",
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Particle mixing rates using the two-fluid model. / Banaei, M.; Deen, N.G.; van Sint Annaland, M.; Kuipers, J.A.M.

In: Particuology, Vol. 36, 01.02.2018, p. 13-26.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Particle mixing rates using the two-fluid model

AU - Banaei, M.

AU - Deen, N.G.

AU - van Sint Annaland, M.

AU - Kuipers, J.A.M.

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N2 - In this work, a new methodology is introduced to calculate the solids mixing rate in dense gas-fluidized beds using the two-fluid model. The implementation of this methodology into an existing two-fluid model code was carefully verified. The solids phase continuity equation was satisfied using our method, and the sensitivity of the computational results to the time step, computational cell size, and discretization scheme was investigated to determine the optimal simulation settings. Using these simulation settings, the degree of solids mixing was observed to rapidly (exponentially) increase with increasing operating pressure and linearly decrease with increasing bed diameter. Our novel methodology can be applied to analyze mixing processes in large lab-scale beds as an alternative to existing time-consuming simulation techniques such as computational fluid dynamics combined with the discrete element model.

AB - In this work, a new methodology is introduced to calculate the solids mixing rate in dense gas-fluidized beds using the two-fluid model. The implementation of this methodology into an existing two-fluid model code was carefully verified. The solids phase continuity equation was satisfied using our method, and the sensitivity of the computational results to the time step, computational cell size, and discretization scheme was investigated to determine the optimal simulation settings. Using these simulation settings, the degree of solids mixing was observed to rapidly (exponentially) increase with increasing operating pressure and linearly decrease with increasing bed diameter. Our novel methodology can be applied to analyze mixing processes in large lab-scale beds as an alternative to existing time-consuming simulation techniques such as computational fluid dynamics combined with the discrete element model.

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KW - Pressure

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