Korean Chemical Engineering Research

  • 제61권2호
  • /
  • Pages.312-321
  • /
  • 2023
  • /
  • 0304-128X(pISSN)
  • /
  • 2233-9558(eISSN)
한국화학공학회 (The Korean Institute of Chemical Engineers)
권호 표지
DOI QR코드

DOI QR Code

Effects of Geometry and Operating Fluid on the Expansion Behavior of Liquid-Solid Fluidized Beds

  • 투고 : 2022.10.08
  • 심사 : 2023.03.08
  • 발행 : 2023.05.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Fluidized beds have been widely used in industrial applications, which in most of them, the operating fluid is non-Newtonian. In this study, the combination of the lattice Boltzmann method (LBM) and the smoothed profile method has been developed for non-Newtonian power-law fluids. The validation of the obtained model were investigated by experimental correlations. This model has been used for numerical studying of changing the operating fluid and geometrical parameters on the expansion behavior in liquid-solid beds with both Newtonian and non-Newtonian fluids. Investigations were performed for seven different geometries, one Newtonian, and two non-Newtonian fluids. The power-law index was in the range of 0.8 to 1, and the results for the Newtonian fluidized beds show more porosity than the non-Newtonian ones. Furthermore, increasing the power-law index resulted in enhancing the bed porosity. On the other hand, bed porosity was decreased by increasing the initial bed height and the density of the solid particles. Finally, the porosity ratio in the bed was decreased by increasing the solid particle diameter.

키워드

참고문헌

  1. Weber, E., Crown Ethers. Ullmann's Encyclopedia of Industrial Chemistry, 2000. 
  2. Mehrabi Gohari, E., et al., "Hydrodynamic Simulation of a Liquid-solid Fluidized Bed Using Lattice Boltzmann and Smoothed Profile Methods," Asia-Pacific J. Chemical Engineering, 12(2), 196-211(2017).  https://doi.org/10.1002/apj.2065
  3. Lali, A., et al., "Behaviour of Solid Particles in Viscous Nonnewtonian Solutions: Settling Velocity, Wall Effects and Bed Expansion in Solid-liquid Fluidized Beds," Powder Technology, 57(1), 39-50(1989).  https://doi.org/10.1016/0032-5910(89)80102-0
  4. Yu, Y., C. Wen, and R. Bailie, "Power-law Fluids Flow Through Multiparticle System," The Canadian Journal of Chemical Engineering, 46(3), 149-154(1968).  https://doi.org/10.1002/cjce.5450460302
  5. Mishra, P., Singh, D. and Mishra, I., "Momentum Transfer to Newtonian and Non-newtonian Fluids Flowing Through Packed and Fluidized Beds," Chemical Engineering Science, 30(4), 397-405(1975).  https://doi.org/10.1016/0009-2509(75)85004-4
  6. Brea, F., Edwards, M. and Wilkinson, W., "The Flow of Nonnewtonian Slurries Through Fixed and Fluidised Beds," Chemical Engineering Science, 31(5), 329-336(1976).  https://doi.org/10.1016/0009-2509(76)80001-2
  7. Kumar, S. and Upadhyay, S., "Mass and Momentum Transfer to Newtonian and Non-newtonian Fluids in Fixed and Fluidized Beds," Industrial & Engineering Chemistry Fundamentals, 20(3), 186-195(1981).  https://doi.org/10.1021/i100003a002
  8. Kawase, Y. and Ulbrecht, J., "Mass and Momentum Transfer with Non-newtonian Fluids in Fluidized Beds," Chemical Engineering Communications, 32(1-5), 263-288(1985).  https://doi.org/10.1080/00986448508911651
  9. Benedict, R. F., Kumaresan, G. and Velan, M., "Bed Expansion and Pressure Drop Studies in a Liquid-solid Inverse Fluidised Bed Reactor," Bioprocess Engineering, 19(2), 137-142(1998).  https://doi.org/10.1007/s004490050494
  10. Lakshmi, A. V., et al., "Minimum Fluidization Velocity and Friction Factor in a Liquid-solid Inverse Fluidized Bed Reactor," Bioprocess Engineering, 22(5), 461-466(2000).  https://doi.org/10.1007/s004490050759
  11. Richardson, J. and Zaki, W., "This Week's Citation Classic," Trans. Inst. Chem. Eng., 32, 35-53(1954). 
  12. Christopher, R. H. and Middleman, S., "Power-law Flow Through a Packed Tube," Industrial & Engineering Chemistry Fundamentals, 4(4), 422-426(1965).  https://doi.org/10.1021/i160016a011
  13. Machac, I., Ulbrichova, I., Elson, T. P. and Cheesman, D. J., "Fall of Spherical Particles Through Non-newtonian Suspensions," Chemical Engineering Science, 50(20), 3323-3327(1995).  https://doi.org/10.1016/0009-2509(95)00168-5
  14. Ergun, S. and Orning, A. A., "Fluid Flow Through Randomly Packed Columns and Fluidized Beds," Industrial & Engineering Chemistry, 41(6), 1179-1184(1949).  https://doi.org/10.1021/ie50474a011
  15. Mehrabi Gohari, E., Sefid, M. and Jahanshahi Javaran, E., "Numerical Simulation of the Hydrodynamics of An Inverse Liquid-solid Fluidized Bed Using Combined Lattice Boltzmann and Smoothed Profile Methods," Journal of Dispersion Science and Technology, 38(10), 1471-1482(2017).  https://doi.org/10.1080/01932691.2016.1253482
  16. Boyd, J., Buick, J. and Green, S., "A Second-order Accurate Lattice Boltzmann Non-newtonian Flow Model," Journal of Physics A: Mathematical and General, 39(46), 14241(2006). 
  17. Chhabra, R. P., Comiti, J. and Machac, I., "Flow of Non-newtonian Fluids in Fixed and Fluidised Beds," Chemical Engineering Science, 56(1), 1-27(2001). https://doi.org/10.1016/S0009-2509(00)00207-4