Five-Point Electro Conductivity Probe Technique

6 Five-Point Electro Conductivity Probe Technique 

The five-point electro conductivity probe technique (FPECPT) has been used to measure time averaged bubble size (volume) distribution, absolute bubble velocity and gas volume fraction in gas-liquid dispersions like the two-phase bubble columns and vertical pipe flows. Other similar conductivity probes have also been used [88, 135]. 

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The first Five-Point Electro Conductivity Probe Technique (FPECPT) was developed by Burgess and Calderbank [30]. In this technique, the bubble size and velocity estimation were based on the assumption that the bubble is always moving up vertically. An advanced version of the Five-Point Electro Conductivity Probe Technique (FPCPT) probe was designed by Steinemann and Buchholz [188]. The bubble size and velocity estimation were not based on the assumption that the bubble is always moving up vertically but computed from the geometry of the probe design and the signals from the bubbles. 

Fig. 13.10 The Five-Point Electro Conductivity Probe Technique (FPECPT). a Probe design of Steinemann and Buchholz [188], b Definition of Bubble movement parameters [122], c Sketch of pulse sequence [122]...

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