Nonlinear interaction underlying flow structure transition of inclined oil–water two-phase countercurrent flow
School of Electrical and Information Engineering, Tianjin University, 300072, Tianjin, People’s Republic of China
Accepted: 10 May 2021
Published online: 19 May 2021
Inclined oil–water two-phase flow exhibits random, unstable spatiotemporal structure, associated with the countercurrent caused by gravity and components interacting. In this paper, the nonlinear analysis to give a deeper understanding of inclined oil–water two-phase flow has been conducted. Firstly, we obtained the multivariate measurement of different flow patterns by vertical multi-electrode array system. Then, based on the multivariate refined composite entropy and transfer entropy, a dynamic nonlinear analysis framework is proposed to characterize the inclined oil–water two-phase flow. The results suggest that the proposed framework can reveal the dynamic information hidden in the oil droplet swarms and countercurrent water motion.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021