Liquid holdup measurement for gas-liquid stratified flows by means of resistive probes and image processing

Abstract Flow patterns exert a fundamental influence on the behaviour of multiphase flows, and they must be brought into play when dealing with their modelling. This is usually done by means summarizing quantities as phase holdups interfacial area concentration. Many techniques have been designed during years to measure them, among which use probes relying electrical resistance one simplest less expensive. While having these points strength, resistive are intrusive devices. work therefore devoted comparison between liquid height (and derived quantities) measurements – for stratified stratified-wavy air-water flows performed using conventional probe an image-based technique. Validation latter was computer-generated flow images. Then, experimental campaign carried out superficial velocities in range 0.03 ÷ 0.06 m/s gas 0.77 2.31 m/s. Results showed that two methods give answers within very few percent difference, more than satisfactory this field. The results also good agreement some most credited literature models correlations.