Numerical simulation and verification of the minimum fluidization velocity in a liquid-solid fluidized bed
ZHANG Xindi
ZHANG Weiyi
LI Zhaoting
ZHAO Jie
LIU Azhen
LI Hanyong
Abstract：In order to use the numerical simulation method of computational particle fluid dynamics(CPFD)instead of the experimental method,a single-tube liquid-solid two-phase fluidized bed experimental system was established.The minimum fluidization velocity of 5 kinds of particles was measured experimentally.The CPFD method was used to simulate the single-tube liquid-solid fluidized bed model.The experimental and simulated values of the minimum fluidization velocity of five kinds of particles were compared,and the error analysis was carried out to verify the correctness of the numerical simulation method.The results show that the minimum fluidization velocity of the five kinds of experimental particles are 0.021 6,0.036 7,0.029 3,0.055 5 and 0.084 5 m/s,respectively.The maximum relative error between the two formulas and the experimental value is less than 10%,and the average relative error is less than 5%,which prove the reliability of the experimental results.The minimum fluidization velocity correction values of the five kinds of simulated particles are 0.024,0.044,0.041,0.069 and 0.062 m/s,respectively.The errors of the minimum fluidization velocity between the simulated correction values of particles S1,S2,S4 and S5 and the experimental values of particles E1,E2,E4 and E5 are respectively 11.1%,19.9%,24.3%and 26.6%,which are all positive deviations and within the allowable range of engineering,proving that CPFD numerical simulation method is reliable.The minimum fluidization velocity increases with the increase of solid particle density and particle size.
Keywords：computational particle fluid dynamicsnumericals imulationliquid-solid two-phase flowfluidized bedthe minimum fluidization velocity
Publication Date：2023-02-25
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：10( 80-89 )