Particle?resolved simulations of four?way coupled, polydispersed, particle?laden flows

We present a collocated-grid framework for direct numerical simulations of polydisperse particles submerged in viscous fluid. The fluid-particle forces are coupled with the immersed boundary method (IBM) while particle-particle modeled combination contact and lubrication models, adapted collocated grids. Our is modified from staggered-grid IBM previous authors to by adapting fluid particle solvers. scales well on high-performance parallel computing platforms. It has been validated against various cases able reproduce experimental results. Tuning parameters have thoroughly calibrated ensure accuracy method. Finally, we demonstrate capability simulate both monodispersed bidispersed fluidized beds power law relationship between inflow velocity porosity.