Pressure drop in low liquid loading flows

A system for improving flow of a multiphase mixture in a fluid transport system by determining pressure drop of low-liquid loading flows, the system comprising

• one or more processors;
• and
• a memory system comprising one or more non-transitory computer-readable media storing instructions that, when executed by at least one of the one or more processors, cause the computing system to perform operations, the operations comprising:
• obtaining one or more physical dimensions of a pipe configured to transport a multiphase flow;
• obtaining one or more physical parameters of the multiphase flow in the pipe;
• determining an effective roughness of a liquid film of the multiphase flow on an interior wall of the pipe using the one or more physical dimensions of the pipe, and using the one or more physical parameters of the multiphase flow;
• determining a pressure drop in the pipe using the effective roughness of the liquid film;
• and
• determining one or more operating parameters of the fluid transport system based on the pressure drop in the pipe.

A non-transitory computer-readable medium storing instructions that, when executed by one or more processors of a computing system, cause the computing system to perform operations, the operations comprising:

• obtaining one or more physical dimensions of a pipe configured to transport a multiphase flow;
• obtaining one or more physical parameters of the multiphase flow in the pipe;
• determining an effective roughness of a liquid film of the multiphase flow on an interior wall of the pipe using the one or more physical dimensions of the pipe, and using the one or more physical parameters of the multiphase flow;
• determining a pressure drop in the pipe using the effective roughness of the liquid film;
• and
• determining one or more operating parameters of the fluid transport system based on the pressure drop in the pipe.