Theory 17/Pipeline Engineering
Slugging Is a Velocity Ratio
The claim
Severe slugging in a multiphase pipeline begins when the ratio of gas to liquid superficial velocity crosses a threshold, not when liquid holdup alone is high.
01Mechanism
Slugs form when gas accumulates behind a liquid blockage and releases; the velocity ratio sets whether that cycle sustains.
02Predictions
- P1Onset should track the ratio.
- P2Holdup alone should mispredict.
03Refutation
Onset tracking liquid holdup would remove the ratio.