Computation of particle dispersion in turbulent liquid flows using an efficient Lagrangian trajectory model

✍ Scribed by X.-Q. Chen; J. C. F. Pereira

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 349 KB
• Volume: 26
• Category: Article
• ISSN: 0271-2091
• DOI: 10.1002/(sici)1097-0363(19980215)26:3<345::aid-fld636>3.0.co;2-g

✦ Synopsis

The dispersion of solid particles in a turbulent liquid flow impinging on a centrebody through an axisymmetric sudden expansion was investigated numerically using a Eulerian -Lagrangian model. Detailed experimental measurements at the inlet were used to specify the inlet conditions for two-phase flow computations. The anisotropy of liquid turbulence was accounted for using a second-moment Reynold stress transport model. A recently developed stochastic -probabilistic model was used to enhance the computational efficiency of Lagrangian trajectory computations. Numerical results of the stochastic-probabilistic model using 650 particle trajectories were compared with those of the conventional stochastic discrete-delta-function model using 18 000 particle trajectories. In addition, results of the two models were compared with experimental measurements.