Circumference liquid film measurement method with single high-speed camera

For gas-liquid two-phase annular flow, one single high-speed camera was used to measure the circumference liquid film. In order to increase the cross-sectional view field angle of circumference liquid film, a novel virtual binocular stereo vision sensor with wide field view angle is proposed and optimized, which contains just a single high-speed camera and two reflector sets. Using optimized virtual stereo sensor and planar laser induced fluorescence (PLIF) technique, vertical annular falling film was measured. Liquid film thickness distribution has been achieved, then using the digital image processing we can measure the liquid film thickness and analyze the film flow characteristics of the circumferential pipe section.