Characteristics of Particle Dispersion in a Jet in Cross-Flow Based on Computational Fluid Dynamics

Abstract-in order to investigate the mechanism of particle dispersion in a jet issuing into a transverse flow, computational fluid dynamics (CFD) were employed to simulate a particle laden jet in cross-flow with the velocity ratio of 2.68. The Reynolds number based on the jet diameter is 14,047, whereas the particle Reynolds number based on the particle diameter (5 ¿m-50 ¿m) varies between 15.2 and 152, indicating that the Stokes number for particles lies between 1.72 × 10⁰ and 1.72 × 10². Results found that particle concentration based trajectories differed a lot from those defined by gas velocity. The counter-rotating vortex pair (CVP) has a significant effect on the preferential accumulation of particles in the near field, and is affected by the particles with large Stokes number. Particle dispersion in the far field was controlled by a unique mechanism, showing that the distance between the locations of high particle concentration and the injection wall was much shorter than the expected distance.