Controlling the Quality of Two-Way Euler/Lagrange Numerical Modeling of Bubbling and Spouted Fluidized Beds Dynamics

Manuel Bernard (1) , Éric Climent (2) , Anthony Wachs (3)

1 IFPEN - IFP Energies nouvelles
2 IMFT - Institut de mécanique des fluides de Toulouse
3 UBC Mathematics - Department of Mathematics [Vancouver]

We numerically simulate three-dimensional fluidized beds of monodisperse spheres using a two-way Euler/Lagrange method. Particles trajectories are tracked in a Lagrangian way, and particles collisions are computed by a soft sphere model. The fluid conservation equations are written in a classical Eulerian fashion and are locally averaged on cells 1 order of magnitude larger than particles. We detail the equations of the model and their numerical implementation. We study the influence of numerical parameters and simulation domain size on computed results in a biperiodic fluidized bed. We then validate the model against theoretical results for a bubbling fluidized bed and against experimental data for a single- and multi-nozzle spouted bed. Finally, we investigate the influence of the Coulomb friction coefficient magnitude on a single-nozzle spouted bed dynamics in order to emphasize the importance of tangential friction in such processes.

Mots clés: Spouted simulations; Fluidized bed

Domaines: Mécanique des fluides [physics.class-ph]; Génie chimique

Manuel Bernard, Éric Climent, Anthony Wachs. Controlling the Quality of Two-Way Euler/Lagrange Numerical Modeling of Bubbling and Spouted Fluidized Beds Dynamics. Industrial and engineering chemistry research, 2017, 56 (1), pp.368-386. ⟨10.1021/acs.iecr.6b03627⟩. ⟨hal-01585480⟩