Numerical simulation of a 3-D gas-solid fluidized bed: Comparison of TFM and CPFD numerical approaches and experimental validation

• Two numerical approaches (CPFD and TFM) are compared in a 3-D fluidized bed. Results of both models with pressure void fraction measurements. CPFD approach predicts lower frequencies the spectra. smaller bubbles velocities than TFM. is less sensitive to threshold value This paper presents results simulation freely bubbling bed, based on Eulerian–Lagrangian approach, using software Barracuda (CPFD-Barracuda). The main obtained were assessed terms frequency analysis, bubble pierced length, size, passage velocity. also experimental data bed optical probes, more common Eulerian-Eulerian implemented commercial Fluent (TFM-Fluent). show that CPFD-Barracuda satisfactorily global behaviour beds low computational cost, although it computes sizes TFM-Fluent experiments. Additionally, spectra particle volume resemble those from experiments simulations, but larger contribution frequencies. peaks close whereas solid seem be underestimated by CPFD-Barracuda. indicate chosen distinguish contours notably influences characteristics, especially for TFM-Fluent, this value.