Abstract
The formation of air bubbles from a injection nozzle submerged in a water/glycerol solution inside a cylindrical tube is investigated by the methodology of the nonlinear time series analysis. It was found from the bifurcation diagram of bubble interval that the period doubling bifurcation occurred by the increase in gas flow rate. Correlation dimensions were estimated from the nozzle pressure fluctuation, and the results indicate that the bifurcation from periodic orbit to chaos occurred in high air flow rate region. It was shown that the correlation dimension could detect the transition of the pressure fluctuation dynamics that could not be detected by mean values and standard deviations.
