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论文类型：期刊论文

发表时间：2010-12-01

发表刊物：JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME

收录刊物：SCIE、EI、Scopus

卷号：132

期号：12

ISSN号：0098-2202

关键字：annular flow; multiphase flow; population balance; size distribution

摘要：The liquid droplet size distribution in gas-liquid vertical upward annular flow is investigated through a CFD (computational fluid dynamics)-PBM (population balance model) coupled model in this paper Two-fluid Eulerian scheme is employed as the framework of this model and a population balance equation is used to obtain the dispersed liquid droplet diameter distribution, where three different coalescence and breakup kernels are investigated. The Sauter mean diameter d(32) is used as a bridge between a two-fluid model and a PBM. The simulation results suggest that the original Luo-Luo kernel and the mixed kernel A (Luo's coalescence kernel incorporated with Prince and Blanch's breakup kernel) can only give reasonable predictions for large diameter droplets. Mixed kernel B (Saffman and Turner's coalescence kernel incorporated with Lehr's breakup kernel) can accurately capture the particle size distribution (PSD) of liquid droplets covering all droplet sizes, and is appropriate for the description of liquid droplet size distribution in gas-liquid annular flow. [DOT: 10.1115/1.4003152]