Slug Flow Regime Map
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Slug Flow Regime Map Calculator

Taitel-Dukler 1976 Two-Phase Flow Pattern Prediction

Predict two-phase flow regime for horizontal or slightly-inclined gas-liquid pipelines per Taitel & Dukler (AIChE J 1976). Computes superficial velocities, Lockhart-Martinelli X, and Taitel-Dukler F/K/T dimensionless groups, then classifies the regime as stratified-smooth, stratified-wavy, intermittent (slug/plug), annular, or dispersed-bubble. Includes severe-slugging risk screen for terrain-induced slugging.

Pipe Geometry

in
degrees
0° horizontal; +up, −down. Taitel-Dukler valid |θ| ≤ 10°
ft
ft
For severe slugging risk (riser systems)

Liquid Phase

BLPD
lb/ft³
Oil ~50; condensate ~45; water 62.4
cP
dyne/cm
Oil ~25; water 72

Gas Phase & Conditions

MMSCFD
psig
°F
—
cP
—

📚 Learn the Theory

Taitel-Dukler derivation, F/K/T groups, regime physics, severe slugging, design implications.

Read Engineering Guide →

Taitel-Dukler Dimensionless Groups

Superficial velocity:

vSL = QL / A | vSG = QG / A

Lockhart-Martinelli (turbulent-turbulent):

X2 = (dP/dL)L,sup / (dP/dL)G,sup

Froude-like F:

F = √(ρG / (ρL − ρG)) · vSG / √(D · g · cos θ)

K (wave-stability):

K = F · √(ReSL) = F · vSL · D / νL · ?

Strictly K = F²·vSL/νL·D; written compactly above.

T (turbulence parameter):

T = √[ (dP/dL)L,sup / ( (ρL − ρG) · g · cos θ ) ]

Regime boundaries (approximate):

F < ~0.5 + hL-stability check → Stratified
K > 20 (in stratified zone) → Stratified Wavy
F > Fcrit(X) → Intermittent
X < ~1.6 in intermittent zone → Annular
T > Tcrit(X) → Dispersed Bubble

Related Calculators

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Beggs-Brill

Pressure drop & holdup for inclined two-phase flow.
🛢️

Hagedorn-Brown

Vertical two-phase flow.
🔧

Slug Catcher

Size a slug catcher once intermittent regime confirmed.
⚠️

Erosional Velocity

API 14E check on the mixture.