Evaluation of numerical strategies for Large Eddy Simulation of particulate two-phase recirculating flows

Predicting particle dispersion in recirculating two-phase flows is a key issue for re-acting flows and a potential application of Large Eddy Simulation (LES) methods. In this study, Euler/Euler and Euler/Lagrange LES approaches are compared in the bluff body configuration from Borée et al. [1] where glass beads are injected into a complex recirculating flow. These tests are performed for non-reacting, non-evaporating sprays but are mandatory validations before computing realistic com-bustion chambers. Two different solvers (one explicit and compressible and the other implicit and incompressible) are also tested on the same configuration. Results show that the gas flow is well predicted by both solvers. The dispersed phase is also well predicted by both solvers but the Lagrangian approach predicts RMS values more accurately than the Eulerian approach. The effects of mesh, solvers and numerical schemes are discussed for each method