Application of Chaos Theory in Identification of Two-Phase Flow Patterns and Transitions in a Small, Horizontal, Rectangular Channel

[+] Author and Article Information
Y. Cai, M. W. Wambsganss, J. A. Jendrzejczyk

Energy Technology Division, Argonne National Laboratory, Argonne, IL 60439

J. Fluids Eng 118(2), 383-390 (Jun 01, 1996) (8 pages) doi:10.1115/1.2817390 History: Received August 26, 1994; Revised August 24, 1995; Online December 04, 2007


Various measurement tools that are used in chaos theory were applied to analyze two-phase pressure signals with the objective of identifying and interpreting flow pattern transitions for two-phase flows in a small, horizontal rectangular channel. These measurement tools included power spectral density function, autocorrelation junction, pseudo-phase-plane trajectory, Lyapunov exponents, and fractal dimensions. It was demonstrated that the randomlike pressure fluctuations characteristic of two-phase flow in small rectangular channels are chaotic, and governed by a high-order deterministic system. The correlation dimension is potentially a new approach for identifying certain two-phase flow patterns and transitions.

Copyright © 1996 by The American Society of Mechanical Engineers
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