Effect of co-flow velocity ratio on evolution of poly-disperse particles in coaxial turbulent jets: A large-eddy simulation study

摘要: In the present work, particle-laden coaxial turbulent jet flow is studied using large-eddy simulation (LES). An Eulerian–Lagrangian framework used to study interaction between continuous phase (air) and discrete (glass bead particles). The solver validated, single-phase simulations, with reference data from experiments. A good match observed results data, for centerline velocity decay radial profiles of axial velocity. Simulations are performed three co-flow ratios 0, 1, 1.5. pertaining particle characteristics presented different size-classes. effect ratio on size–velocity correlation statistics both phases an emphasis understanding differences in dispersion due around central jet. It that negative potential core region, it becomes positive as one moves downstream. For heavy particles, distance required attain same air increases increase ratio. size-conditioned number density along directions jets showed some interesting trends could be explained based Stokes effect. Significant particles realized when corresponding (StL), defined large-scale eddies, order one. evolution characteristic size exhibited non-monotonic all ratios. Overall, work demonstrates application LES in-depth poly-disperse jets.