Particle drag force modeling in mechanically agitated polydisperse slurry

For solid-liquid flow modeling, the accurate predictability of drag force acting on a particle is crucial to obtaining realistic a believable results and the development of reliable digital twins of industrial solid-liquid reactors. Current models used for monodisperse suspensions show errors of 20-30%. The basis of the proposed project is the development and perfection of the model of drag force acting on a particle during the suspension flow in a mechanically stirred vessel. The distributions of the slip velocity and length scale, and integral and local characteristics of the slurry flow (NSP, NCD, cloud height, particle concentration, particle layer distribution at the bottom, heat transfer coefficient) will be determined experimentally, which will be used to calibrate the model for both monodisperse and polydisperse suspensions. The advanced Lattice Boltzmann method (LBM) implemented in commercial software will be used for the flow simulation and particle tracking. The extension of LBM for industrial-scale tanks will also be investigated.