Hi,

Could anyone elaborate the modifications on the original Beggs & Brills correlation/ procedure for two phase flow, as done by Payne etc. or maybe share the original paper instead:-

Payne G. A., Palmer C. M., Brill J. P., & Beggs H. D., (1979) “Evaluation of inclined-pipe, two-phase liquid holdup and pressure-loss correlations using experimental data”.
Journal of Petroleum Technology, September 1979, 1198-1208.

Thanks in advance....