Numerical Simulation of a Natural Gas Cylindrical Cyclone Separator Using Computational Fluid Dynamics

Among the surface facilities used in an oil field, there are the gas-liquid separators. In this paper, the study of gas-liquid separation in a cylindrical cyclone separator (GLCC) using Computational Fluids Dynamics (CFD) was carried out. The multiphase mixture model and the k-e Realizable turbulence model in an air-water mixture with different geometries of the separator varying the inlet angle from 27 to 36 and 45 degrees were used. Later, variables as the volumetric fraction, velocity and pressure drop in the separator were studied. Finally, a natural gas mixture from a colombian oil field, was simulated using species transport model. The results showed that a 36 degrees inlet is the most suitable for the separation process due to its capacity to form a high intensity swirl without produce liquid carry over. Also, it was found that the centrifugal separator could be a suitable alternative compared with conventional gravitational gas-liquid separators.