Bifurcation analysis of bubble dynamics in fluidized beds

Journal Article · Mon Jan 01 00:00:00 EST 2007 · Chaos

DOI:https://doi.org/10.1063/1.2712309· OSTI ID:931959

Blomgren, Peter ^[1]; Palacios, Antonio ^[1]; Zhu, Bing ^[1]; Daw, C Stuart ^[2]; FINNEY, Charles E A ^[2]; Halow, John ^[3]; Pannala, Sreekanth ^[2]

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1. San Diego State University
2. ORNL
3. Waynesburg University

We use a low-dimensional, agent-based bubble model to study the changes in the global dynamics of fluidized beds in response to changes in the frequency of the rising bubbles. The computationally based bifurcation analysis shows that at low frequencies, the global dynamics is attracted towards a fixed point since the bubbles interact very little with one another. As the frequency of injection increases, however, the global dynamics undergoes a series of bifurcations to new behaviors that include highly periodic orbits, chaotic attractors, and intermittent behavior between periodic orbits and chaotic sets. Using methods from time-series analysis, we are able to approximate nonlinear models that allow for long-term predictions and the possibility of developing control algorithms.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: FE USDOE - Office of Fossil Energy (FE)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 931959
• Journal Information: Chaos, Vol. 17, Issue 1
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
97
ALGORITHMS
BIFURCATION
BUBBLES
FLUIDIZED BEDS
TIME-SERIES ANALYSIS
DYNAMICS
FLOW MODELS