Search
Close this search box.

Sofiane Benyahia, Augusto Neri, 'Numerical study of deaeration of aeratable particles', Powder Technology, Volume 445, 120038, 2024 https://doi.org/10.1016/j.powtec.2024.120038. (https://www.sciencedirect.com/science/article/pii/S003259102400682X)

Abstract: This study investigates, through numerical multiphase flow simulations, the deaeration (or defluidization) of aeratable glass particles of about 80 μm diameter near minimum fluidization and bubbling conditions. First, the effects of plenum (also called windbox) are studied by using an idealized gas inlet condition with no windbox, then an empty and filled windbox are compared with experimental results at minimum fluidization velocity (Umf). Simulation results obtained using the discrete particle method (DEM) and the continuum two-fluid method (TFM) are compared with available experimental data for gas pore pressure decay during defluidization from minimum fluidization conditions. Second, the quantitative effects of cohesion and the presence of small clusters are included in the physical model to better understand the experimental results for deaeration from near minimum bubbling velocity (Umb).
Keywords: Defluidization; Deaerartion; CFD; Pyroclastic flows; Discrete element method; Two fluid method