PIV and CFD-DEM simulation of gas jet fluidization of a 1mm ceramic particle bed*

Experiments were conducted at PSRI in 2016 studying high-speed horizontal gas jets penetrating into a marginally fluidized bed of semicircular cross-section. Previous efforts have focused on the largest particles of the dataset, 6mm and 3mm diameter, which are more appealing as numerical validation data due to manageable particle counts. In this work, we focus on ceramic beads 1mm in diameter. The experimental data from this material had not yet been fully characterized because the bed contains approximately 7 million particles, making parametric study with a discrete particle model computationally expensive. However, the recent development of MFIX-Exa, a massively parallel, AMReX-enabled CFD-DEM code, as made such simulations much more reasonable. We present the results of the PIV analysis of the velocity field and compare to simulations adjusting the drag calibration method, the jet resolution method, and the fluid continuity approximation.