.... This objective is achieved by proposing a liquid viscosity-dependent sheltering coefficient model into the Taitel and Dukler (1976) stratified-smooth/stratified-wavy transition model. Further objective is to propose a new slug/annular transition criterion in horizontal and slightly inclined two-phase flow...

... dependent criterion is proposed for the existence of mist flow. Two models are proposed for the existence of plug flow. The first plug model is an exact criterion for the existence of bubble flow. The second plug model is based on experimental data published in literature. A new criterion for the existence...

.... Irregular and breaking waves have been observed for high gas flow rates. Comparisons with wave formation criterion (Jeffrey, 1925) suggest that the sheltering coefficient is a function of the liquid viscosity. Finally, none of the criteria for stratified to non-stratified flow presents a fair agreement...

... was predicted very well. However, an additional horizontal length was needed in the simulations to obtain slugging. This additional requirement is in-line with known shortcomings of multiphase models identified in literature. Aside this criterion, also a minimum hydraulic jump was required. The current drift...

... for a given well-reservoir combination. multiphase 7 upstream oil & gas reservoir surveillance prediction loading process reservoir criterion artificial lift system gas well deliquification production control bottomhole pressure pressure drop reservoir property liquid loading process...