摘要
The liquid–solid countercurrent fluidization process in an extraction column was numerically simulated based on the particle trajectory model of Eulerian–Lagrangian method. The simulation approach was validated by previous experiments. A power function correlation was proposed for dimensionless slip velocity Uslip/Utand hold-up fraction φ, and the operational zone in the countercurrent fluidization was determined. Simultaneous countercurrent fluidization of particles with different diameters was also simulated. The comparison shows that the simulation results are consistent with the calculation values from the multi-particle free sedimentation model based on noninterference assumption, verifying the reliability of the approach in present work.
The liquid–solid countercurrent fluidization process in an extraction column was numerically simulated based on the particle trajectory model of Eulerian–Lagrangian method. The simulation approach was validated by previous experiments. A power function correlation was proposed for dimensionless slip velocity Uslip/Utand hold-up fraction φ, and the operational zone in the countercurrent fluidization was determined. Simultaneous countercurrent fluidization of particles with different diameters was also simulated. The comparison shows that the simulation results are consistent with the calculation values from the multi-particle free sedimentation model based on noninterference assumption, verifying the reliability of the approach in present work.
基金
Supported by the National Natural Science Foundation of China(21306129 and 41201497)
the Natural Science Foundation of Tianjin(12JCQNJC05300 and 11JCYBJC05400)
