Application of kolmogorov entropy in analysis of flow patterns in three-phase bubble column

Differential pressure fluctuation time series were collected at three-phase bubble column. A high-resolution digital camera used to record the flow patterns in various operating conditions. Pressure fluctuation time series were analyzed by kolmogorov entropy and correlation dimension. Relations between the chaotic parameter with superficial gas velocity were obtained. Regime transition was studied in three-phase bubble column. Experimental results show that three-phase bubble column was observed homogeneous flow, transition flow and heterogeneous clearly. Chaotic characteristics of three-phase bubble column are different under different flow patterns. Chaotic characteristics were strongest at the superficial gas velocity of 0.22 m/s. Correlation dimension and kolmogorov entropy curve correspond to two flow pattern transition gas velocities are 0.036~0.064 m/s, 0.18 m/s. Kolmogorov entropies are dividing for different flow patterns, and have definitely progressive significance.