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Computation of particle dispersion in turbulent liquid flows using an efficient Lagrangian trajectory model
Author(s) -
Chen X.Q.,
Pereira J. C. F.
Publication year - 1998
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/(sici)1097-0363(19980215)26:3<345::aid-fld636>3.0.co;2-g
Subject(s) - turbulence , eulerian path , computation , mechanics , trajectory , flow (mathematics) , statistical physics , stochastic modelling , physics , computational fluid dynamics , mathematics , classical mechanics , lagrangian , algorithm , statistics , astronomy
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. © 1998 John Wiley & Sons, Ltd.