Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
권호 표지
DOI QR코드

DOI QR Code

Two- and Three-dimensional Analysis on the Bubble Flow Characteristics Using CPFD Simulation

  • Lim, Jong Hun (School of Chemical Engineering, Sungkyunkwan University) ;
  • Lee, Dong Hyun (School of Chemical Engineering, Sungkyunkwan University)
  • Received : 2017.03.26
  • Accepted : 2017.07.01
  • Published : 2017.10.01
Download PDF
⟨ Previous Next ⟩

Abstract

Bubble flow characteristics in fluidized beds were analyzed by CPFD simulation. A fluidized bed, which had the size of $0.3m-ID{\times}2.4m-high$, was modeled by commercial CPFD $Barracuda^{(R)}$. Properties of bed material were $d_p=150{\mu}m$, ${\rho}_p=2,330kg/m^3$, and $U_{mf}=0.02m/s$. Gas was uniformly distributed and the range of superficial gas velocity was 0.07 to 0.16 m/s. Two other geometries were modeled. The first was a three-dimensional model, and the other was a two-dimensional model of $0.01m{\times}0.3m{\times}2.4m$. Bubble size and rising velocity were simulated by axial and radial position according to superficial gas velocity. In the case of three-dimensional model, simulated bubble rising velocity was different from correlations, because there was zigzag motion in bubble flow, and bubble detection was duplicated. To exclude zigzag motion of bubble flow, bubble rising velocity was simulated in the two-dimensional model and compared to the result from three-dimensional model.

Keywords

References

  1. Karimipour, S. and Pugsley, T., "A Critical Evaluation of Literature Correlations for Predicting Bubble Size and Velocity in Gas-solid Fluidized Beds," Powder Technology, 205(1), 1-14(2011). https://doi.org/10.1016/j.powtec.2010.09.016
  2. Snider, D. M., "An Incompressible Three-Dimensional Multiphase Particle-in-Cell Model for Dense Particle Flows," J. of Computational Physics, 170(2), 523-549(2001). https://doi.org/10.1006/jcph.2001.6747
  3. Cai, P., Schiavetti, M., Michele, G. D. and Grazzini, G. C., "Quantitative Estimation of Bubble Size in PFBC," Powder Technology, 80(2), 99-109(1994). https://doi.org/10.1016/0032-5910(94)02834-6
  4. Mori, S. and Wen, C.Y., "Estimation of Bubble Diameter in Gaseous Fluidized Beds," AIChE J., 21(1), 109-115(1975). https://doi.org/10.1002/aic.690210114
  5. Davidson J. F. and Harrison, D., Fluidized particles, Cambridge University Press, London (1963).
  6. Miwa, K., Mori, S., Kato, T. and Muchi, I., "Behavior of Bubbles in Gaseous Fluidized Bed," Int. Chem. Eng., 12, 187-194(1972).
  7. Lim, J. H., Lee, Y., Shin, J. H., Bae, K., Han, J. H. and Lee, D. H., "Hydrodynamic Characteristics of Gas-solid Fluidized Beds with Shroud Nozzle Distributors for Hydrochlorination of Metallurgical-grade Silicon," Powder Technology, 266, 312-320(2014). https://doi.org/10.1016/j.powtec.2014.06.031
  8. Lim, J. H., Shin, J. H., Bae, K., Kim, J. H., Lee, D. H., Han, J. H. and Lee, D. H., "Hydrodynamic Characteristics of Bubbles in Bubbling Fluidized Bed with Internals," Korean J. of Chem. Eng., 32(9), 1938-1944(2015). https://doi.org/10.1007/s11814-015-0131-x
  9. Lim, J. H., Bae, K., Shin, J. H., Kim, J. H., Lee, D. H., Han, J. H. and Lee, D. H., "Effect of Particle-Particle Interaction on the Bed Pressure Drop and Bubble Flow by Computational Particle-Fluid Dynamics Simulation of Bubbling Fluidized Beds with Shroud Nozzle," Powder Technology, 288, 315-323(2016). https://doi.org/10.1016/j.powtec.2015.11.017
  10. Lim, J. H., Bae, K., Shin, J. H., Lee, D. H., Han, J. H. and Lee, D. H., "CPFD Simulation of Bubble Flow in a Bubbling Fluidized Bed with Shroud Nozzle Distributor and Vertical Internal," Korean Chemical Engineering Research, 54(5), 678-686(2016). https://doi.org/10.9713/kcer.2016.54.5.678

Cited by

  1. 기포유동층 고분자 중합 반응기에서의 슬러그 특성 vol.58, pp.4, 2020, https://doi.org/10.9713/kcer.2020.58.4.651