JIN Ningde, NIE Xiangbin, REN Yingyu, et al. CHARACTERIZATION OF OIL/WATER TWO-PHASE FLOW PATTERNS IN VERTICAL UPWARD PIPES BASED ON KOLMOGOROV ENTROPY TIME SERIES ANALYSIS[J]. CIESC Journal, 2003, (7): 936-941.
JIN Ningde, NIE Xiangbin, REN Yingyu, et al. CHARACTERIZATION OF OIL/WATER TWO-PHASE FLOW PATTERNS IN VERTICAL UPWARD PIPES BASED ON KOLMOGOROV ENTROPY TIME SERIES ANALYSIS[J]. CIESC Journal, 2003, (7): 936-941.DOI:
A new computation method of Kolmogorov entropy based on the concept of general entropy was used to extract the complexity of time series in order to characterize the oil/water two phase flow patterns
and was proved reliable by an example of the Mackey-Glass Equation.The characterization results of Kolmogorov entropy for the experimental fluctuating signals of conductance are analyzed
and the sensitivity of the Kolmogorov entropy to flow pattern variations is confirmed. Also the results correspond to the complex power spectrum characteristics and characterization results of the fractal and chaos which was presented in the authors’ previous study. It shows that Kolmogorov entropy is a sensitive “indicator” of oil/water two phase flow pattern variations.