Taitel-Dukler Flow Pattern & Pressure Drop for Horizontal Pipelines
Understand two-phase flow regimes, liquid holdup, and multiphase pressure drop
It predicts the flow regime (Taitel-Dukler 1976 map) and the two-phase pressure drop and liquid holdup for horizontal and near-horizontal pipes. Pressure drop uses the Lockhart-Martinelli two-phase multiplier on the liquid-alone gradient; the regime map and holdup are Taitel-Dukler-based. (It does not implement the separate Dukler 1964 friction-factor-ratio correlation.)
The Taitel-Dukler model is a mechanistic flow pattern prediction method that classifies horizontal two-phase flow into stratified, intermittent, annular, dispersed bubble, and stratified wavy regimes based on dimensionless parameters.
The Lockhart-Martinelli parameter (X) is the ratio of single-phase liquid pressure drop to single-phase gas pressure drop. It is used in the Dukler correlation to determine two-phase friction multipliers and liquid holdup.
Dukler correlation is preferred for horizontal and near-horizontal pipelines where stratified and slug flow dominate. Beggs-Brill is better suited for inclined and vertical pipes where inclination effects are significant.