DISPERSION OF PARTICLES IN ANISOTROPIC TURBULENT FLOWS

A Lagrangian approach is used to simulate particle dispersion in aniso tropic turbulent flows. Discrete particles are tracked in three dimens ions, influenced by the fluid's turbulent velocity fluctuations. The f luctuations are temporally and directionally correlated through a stat istical sampling method reflecting the anisotropy of the flow field. T hey are calculated at the discrete particle's position through a spati al correlation which takes into consideration the anisotropy of the Re ynolds stresses. The method is first tested as to the performance of t he temporal and directional correlation features and is then combined with a Eulerian scheme and an algebraic Reynolds stress model for the prediction of the carrier phase. The final form of the model is used t o predict a two-phase turbulent round jet and a two-phase inert flow f rom a quarl burner, with swirl. In parallel to these, the method is co mpared to a previous particle-tracking method based on an isotropic hy pothesis.