State of the Art on Two-Phase Non-Miscible Liquid/Gas Flow Transport Analysis in Radial Centrifugal Pumps-Part A: General Considerations on Two-Phase Liquid/Gas Flows in Centrifugal Pumps

Gas–liquid mixtures are present in numerous industrial applications, such as the process industry, oil production and transport with natural gas, deep-sea extraction, irrigation. Any pump may have to carry multiphase flows. However, document is related non-miscible liquid/gas flow analysis centrifugal pumps because which topic can be a more challenging task compared axial mixed machines due specific body force buoyancy actions large density differences between phases. The first introduces main usual gas–liquid two-phase definitions simplifications. A dimensional variables parameters that used for pumps. Basic physical aspects of motion an impeller channel explained, rapid description patterns radial described. Finally, review simplified empirical semi-empirical analytical models proposed their limitations.