Are continuum predictions of clustering chaotic?
- Univ. of Colorado, Boulder, CO (United States). Dept. of Chemical and Biological Engineering
Gas-solid multiphase flows are prone to develop an instability known as clustering. Two-fluid models, which treat the particulate phase as a continuum, are known to reproduce the qualitative features of this instability, producing highly-dynamic, spatiotemporal patterns. However, it is unknown whether such simulations are truly aperiodic or a type of complex periodic behavior. By showing that the system possesses a sensitive dependence on initial conditions and a positive largest Lyapunov exponent, λ1 ≈ 1/τ, we provide a tentative answer: continuum predictions of clustering are chaotic. We further demonstrate that the chaotic behavior is dimensionally dependent, a conclusion which unifies previous results and strongly suggests that the chaotic behavior is not a direct consequence of the fundamental kinematic instability, but requires a secondary (inherently multidimensional) instability.
- Research Organization:
- Univ. of Colorado, Boulder, CO (United States)
- Sponsoring Organization:
- USDOE Office of Fossil Energy (FE); USDOE
- Grant/Contract Number:
- FE0026298
- OSTI ID:
- 1465353
- Alternate ID(s):
- OSTI ID: 1349369; OSTI ID: 1832978
- Journal Information:
- Chaos: An Interdisciplinary Journal of Nonlinear Science, Vol. 27, Issue 3; ISSN 1054-1500
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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