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Investigation of flow development of co-current gas-liquid vertical slug flow

Kaji, R.; Azzopardi, B. J.; Lucas, D.


Void fraction, Taylor bubble/liquid slug length, and slug frequency are parameters essential to understand the structure of slug flow. In the present study, these parameters were extracted from the time series of cross-sectionally averaged void fraction obtained from two vertical facilities having similar internal pipe diameter but significantly different axial lengths; 51.2mm/3.5m and 52.3mm/9m. To investigate the effect of flow development on slug characteristics measurements were carried out at several axial locations from the mixing section for both facilities. For slug frequency, a new correlation including the effect of the axial length has been proposed and assessed using previously published data.

Keywords: slug flow; vertical pipe; flow structure; flow development; frequency


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