Pressure Drop in Horizontal and Vertical Cocurrent Gas-Liquid Flow

Measurement and prediction of pressure drop in two-phase flow

“…The data obtained together with that of Spedding and Nguyed5 were used to check the reliability of suggested pressure prediction models. In order to avoid problems with the statistical method of presenting the data detailed earlier, average error was calculated for any prediction using eqn (2).…”

Airlift bioreactors: Analysis of local two‐phase hydrodynamics

“…For the flows of interest in this study, Lockhart-Martinelli multipliers increase the single-phase values by approximately 10070, thus significantly underestimating the effects observed in these experiments. Several investigators have developed improvements to the Lockhart-Martinelli approach by considering acceleration effects (Love, 1974), gravity effects (Hughmark, 1963), and systems having a greater range of flow rate and physicochemical properties (Baroczy, 1966;Chisholm, 1966). Even incorporating these improvements by various investigators, the friction factor values for two-phase flow change only minimally from the single-phase values relative to the order of magnitude differences observed experimentally in this study.…”

Empirical Formulas for Calculation of Negative Pressure Difference in Vacuum Pipelines

“…Chenoweth and Martin [28], Hughmark [29,30] and Hughmark and Pressburg [31] carried out investigations on a pressure drop in vertical and horizontal pipelines during a two-phase flow of liquids and gases. The scope of their investigations encompassed not only water and air but also petroleum and air, gasoline and air, oil mixture and air, naphtha and air, gas oil and air, water and water foam, salt solutions and air.…”