Analysis of unsteady Lagrangian and Eulerian characteristics of a liquid fluidized bed by Direct Numerical Simulation

Stéphane Vincent (1, 2) , Jean-Luc Estivalezes (3, 4) , J.C. Brändle de Motta (3, 4) , Olivier Simonin (3) , Olivier Masbernat (2)

1 I2M - Institut de Mécanique et d'Ingénierie de Bordeaux
2 LGC - Laboratoire de Génie Chimique
3 IMFT - Institut de mécanique des fluides de Toulouse
4 ONERA - The French Aerospace Lab [Toulouse]

The characterization of fluidized beds is still a challenging task for macroscopic modeling issues and industrial applications. The macroscopic models require to be fed with parameters or laws that are not well understood or even impossible to estimate as soon as the solid fraction is larger than 0.1. The aim of the present work is to investigate Direct Numerical Simulation [1] of unsteady particle flows in order to solve all the time and space scale of the flow and the particle and to allow for the estimate of unknown macroscopic or stochastic characteristics of the flow. In the DNS, the particles are fully resolved, i.e. the particle diameter is larger than the grid size and to the smallest hydrodynamic scale. A benchmark experimental fluidized bed [2] is simulated and analyzed in terms of macroscopic and Lagrangian characteristics. Comparisons of numerical solutions to measurements are achieved with success.

Mots clés: DNS OF FLUIDIZED BED; RESOLVED SCALE PARTICLE; VISCOUS PENALTY METHOD

Domaines: Modélisation et simulation

Stéphane Vincent, Jean-Luc Estivalezes, J.C. Brändle de Motta, Olivier Simonin, Olivier Masbernat. Analysis of unsteady Lagrangian and Eulerian characteristics of a liquid fluidized bed by Direct Numerical Simulation. 3rd International Conference on Turbulence and Interactions, Jun 2012, LA SALINES LES BAINS, France. ⟨hal-01065041⟩