On the Numerical Study of Bubbly Flow Created by Ventilated Cavity

Min Xiang; S.C.P. Cheung; Ji Yuan Tu; Wei Hua Zhang; Yang Fei

doi:10.4028/www.scientific.net/AMM.29-32.143

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 29-32On the Numerical Study of Bubbly Flow Created by...

On the Numerical Study of Bubbly Flow Created by Ventilated Cavity

Abstract:

The aim of the study was to develop a numerical model to reproduce the bubbly flow field created by ventilated cavity which includes three different regions. The model was established based on the Eulerian-Eulerian two-fluid model coupled with a population balance approach which is solved by the Homogeneous Multiple-Size-Group (MUSIG) model to predict bubble size distribution. Base on the model, the simulation was carried out at the experimental condition of Su et al. (1995). Firstly three regions were successfully captured proved by the spatial voidage distribution and streamline shape. Then distributions of void fraction and Sauter mean bubble diameter at various sections below the cavity corresponding to three regions respectively were plotted against experimental data. A close agreement was observed in the void fraction distribution which indicates that qualitative details of the structure of the two-phase flow field below the cavity was successfully produced. The Sauter mean bubble diameter in the pipe flow region was under-predicted for about 10%. In conclusion, the proposed model was validated in predicting the multi-region flow field below the ventilated cavity which will provide a valuable insight in designing and controlling of the two phase systems with the detailed flow field information obtained.

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Applied Mechanics and Materials (Volumes 29-32)

Pages:

143-148

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.29-32.143

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Online since:

August 2010

Authors:

Min Xiang, S.C.P. Cheung, Ji Yuan Tu, Wei Hua Zhang, Yang Fei

Keywords:

Bubbly Flow, Computational Fluid Dynamics (CFD), MUSIG, Population Balance Method, Ventilated Cavity

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