Gas‐liquid two‐phase flow behavior in terrain‐inclined pipelines for wet natural gas transportation

Abstract

The liquid slug formation in a hilly-terrain pipeline is simulated using the Volume of Fluid model and RNG k-ε turbulence model. The numerical model is validated by the experimental data of the horizontal slug flow. The influence of pipe diameter on liquid slug formation is discussed in detail. The results show that the pipe is blocked by the liquid slug at the moment of slug formed. The pipe pressure suddenly increases, and then decreases gradually in the process of liquid slug formation and motion. The pipe diameter has little effect on liquid slug formation, while the pipe pressure drop and liquid holdup change small.