Signal analysis approach in two phase flow patterns detection through millichannels

In this paper, efforts have been made to identify the flow regimes and their transitions using pressure signals and optical probe signals in millichannels of diameter 4.2 mm. Observations are first made through high-speed videography, and then voltage signals from the optical probe and pressure transmitter are used to identify the different flow regimes. A statistical approach, the probability density function (PDF), has been used to analyze the signal data and draw conclusions about the flow regimes. Results show both methods are very effective in detecting flow regimes in non-transparent pipes. Both the pressure and optical probe methods show high potential for flow pattern recognition.