| The objective of this study is to develop a simplified dedicated Computational Fluid Dynamics (CFD) model and computer program for rotational two-phase flow in Gas-Liquid Cylindrical Cyclone (GLCC) separators.; The rotational two-phase flow model is axisymmetric, considering the radial, axial and circumferential velocity components, applicable to steady-state and isothermal flow conditions. The model is based on the Drift Flux formulation, utilizing a closure relationship for the slip velocity in both the axial and radial directions. A two-layer turbulence model is developed to calculate the turbulent eddy viscosity within the GLCC. A boundary condition is proposed for the flow behavior which is not-fully developed at the outlets of the GLCC. A control volume formulation is utilized in the numerical solution scheme to solve the model governing equations.; Comparisons between the prediction of the proposed model with both experimental data and simulations by an available commercial CFD code have been conducted for verification purposes. The comparisons carried out for single-phase laminar flow, single-phase turbulent flow and two-phase turbulent flow, demonstrated the accuracy of the proposed method and the scheme solution.; The developed model can provide details of the complex tangential and axial velocity and void fraction distributions. This information is essential in the development of reliable design tools for the GLCC. An example for the application of the proposed model and code for the GLCC design is also presented. This includes the prediction of the onset of gas carry-under and liquid-blowout operational envelopes, which define the proper conditions for efficient operation of the GLCC separator. No experimental data, mechanistic model predictions or CFD simulations are available for the operational envelope for gas carry-under, at the present time. This indicates the potential design capabilities of the proposed model. |
