期刊
INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW
卷 31, 期 1, 页码 93-100出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.ijheatfluidflow.2009.10.001
关键词
LES; Mixing layer; Two-phase flows; Self-similarity; Preferential particle concentration
资金
- European Community [AST5-CT-2006-030828]
Large Eddy simulation (LES) is applied to a droplet laden turbulent mixing layer and the influence of shear, on the transport and preferential concentration of the dispersed phase is discussed. A Lagrangian formulation has been adopted for the particle dispersion coupled with an Eulerian description for the carrier gas. A stochastic model has been used to account for influence of the sub-grid scale motions of the continuous phase on the particle motion. Simulations conducted neglecting this sub-grid dispersion model show that the liquid dispersion is under predicted. However, when the sub-grid model is included the results show good agreement when compared with the experimental findings, demonstrating that the characteristics of the flow are well captured. A sensitivity analysis on the effect of the dispersion constants has been conducted, suggesting that increasing the contribution of the stochastic term, leads to a higher accumulation of smaller particles at the edge of the mixing layer. (C) 2009 Elsevier Inc. All rights reserved.
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