Abstract: Systems, methods, and computer-readable media that improve flow of a multiphase mixture in a fluid transport system by determining pressure drop of low-liquid loading flows are provided. The method includes obtaining physical dimensions of a pipe that transports a multiphase flow. The method also includes obtaining physical parameters of the multiphase flow in the pipe. The method further includes determining an effective toughness of a liquid film of the multiphase flow on an interior wall of the pipe using the physical dimensions of the pipe and the physical parameters of the multiphase flow. Additionally, the method includes determining a pressure drop in the pipe using the effective roughness of the liquid film. Moreover, the method includes determining operating parameters of the system based on the pressure drop in the pipe.

Abstract: Methods and systems for modelling annular multiphase fluid flows in a structure are disclosed. In one example, a method is disclosed that includes determining a liquid velocity distribution for a liquid component the multiphase fluid flow; determining a gas velocity distribution for a gas component of the multiphase fluid flow; determining a film roughness between the liquid and gas components at least in part by balancing gravity forces and turbulent stresses so that asymmetry in the fluid flow increases as a deviation of the structure from a first direction; and generating a fluid flow model based in part on the liquid and gas velocity distributions and the film roughness.

Abstract: Systems, methods, and computer-readable media that improve flow of a multiphase mixture in a fluid transport system by determining pressure drop of low-liquid loading flows are provided. The method includes obtaining physical dimensions of a pipe that transports a multiphase flow. The method also includes obtaining physical parameters of the multiphase flow in the pipe. The method further includes determining an effective toughness of a liquid film of the multiphase flow on an interior wall of the pipe using the physical dimensions of the pipe and the physical parameters of the multiphase flow. Additionally, the method includes determining a pressure drop in the pipe using the effective roughness of the liquid film. Moreover, the method includes determining operating parameters of the system based on the pressure drop in the pipe.