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Direct numerical simulation of a three-dimensional particle laden plane mixing layer considering inter-particle collisions
- Source :
-
Chemical Engineering Science . Dec2011, Vol. 66 Issue 23, p6232-6243. 12p. - Publication Year :
- 2011
-
Abstract
- Abstract: To investigate the behavior of inter-particle collision and its effects on multiphase flow, the direct numerical simulation of a three-dimensional gas–solid two-phase plane mixing layer is conducted. The flow is assumed to be temporally evolving and incompressible. The particle trajectories are traced by the one-way or two-way coupled Lagrangian method separately. The deterministic hard-sphere model is used to describe the inter-particle collision. Calculations are performed for a particle Stokes numbers of 3. The results show that the preferential concentration phenomenon of particles is found after the beginning of the rolling up of the large-scale vortex structures due to the influence of the vortex. It is also found that the inter-particle collision occurs frequently in the local regions with higher particle concentration of the flow field. The evolution of inter-particle collision can be divided into 3 stages under the influence of the growth of the vortex and the particle dispersion. The results under the two-way coupling show that the particle distribution is more uniform. The modifications of the mixed fluid thickness, the Reynolds stresses, and the mean stream-wise velocity of two phases due to inter-particle collision are quantitatively investigated. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00092509
- Volume :
- 66
- Issue :
- 23
- Database :
- Academic Search Index
- Journal :
- Chemical Engineering Science
- Publication Type :
- Academic Journal
- Accession number :
- 66232862
- Full Text :
- https://doi.org/10.1016/j.ces.2011.08.052