Effect of Clearance between Two Sensor-Probes on Measured Values of Bubble Properties in a Bubble Column
The effect of probe clearance on the rising velocity and chord length of bubbles in a bubble column was examined in measurements with the two-channel U-shaped optical fiber probe method. The probe clearances ranged from 0.2 to 1.5 cm. A few restrictions required in the signal processing to obtain the reasonable data. With increasing probe clearance, the observed values of the bubble velocities slightly increase; however, those of the bubble chord lengths drastically increase to 160% in the coalesced bubble regime, though they are almost constant in the dispersed bubble regime. A simple theory is proposed considering the probability of bubbles contacting with the probes, and used to successfully explain the experimental results.
- Journal of chemical engineering of Japan
Journal of chemical engineering of Japan 32(1), 162-165, 1999-02
The Society of Chemical Engineers, Japan