A study of the available correlations for predicting void fraction in cocurrent gas-liquid flow in conduits

The existing correlations for predicting void fraction in all orientations and regimes of cocurrent two-phase gas-liquid flow are surveyed, compared, and systematically classified. Guidelines for the selection of a correlation for a particular application are presented. Sources of data and physical models describing void fraction in cocurrent two-phase flow are listed. This information is presented as an aid to the potential user of the available correlations, and to the researcher who wishes to investigate specific areas of cocurrent two-phase flow where knowledge is lacking or incomplete.