Multi-scale cross entropy analysis for inclined oil-water two-phase countercurrent flow patterns

作者：Zhu Lei; Jin Ning De^*; Gao Zhong Ke; Zong Yan Bo

来源：Chemical Engineering Science, 2011, 66(23): 6099-6108.

DOI：10.1016/j.ces.2011.08.034

• Multiphase flow
• Conductance sensor
• Entropy
• Complex fluids
• Nonlinear dynamics
• Multi-scale analysis

The flow of an oil-water two-phase fluid in an inclined pipe exhibits fundamentally different behaviors to that of a vertical two-phase flow, especially the flow commonly presents complex countercurrent flow structure due to the influence of gravity. The understanding of inclined oil-water flow is of important significance for flow measurement and production optimization. We using multi-scale cross entropy (MSCE) analysis investigate the nonlinear dynamics of inclined water-dominated oil-water two-phase flow patterns which are Dispersion oil-in-water-Pseudoslugs (D O/W PS), Dispersion oil-in-water-Countercurrent (D O/W CT) and Transitional Flow (TF). We find that the rate of low-scale cross entropy can effectively identify flow patterns, and the high-scale cross entropy can represent their long-range dynamics. The research results show that the multi-scale cross entropy analysis can be a helpful tool for revealing nonlinear dynamics of inclined oil-water two-phase flow in terms of microscopic and macroscopic views.

• 出版日期2011-12-1
• 单位天津大学